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id="toc-Recherche_bibliographique_avant_l'avènement_de_l'informatique-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nombre_de_substances_chimiques_recensées" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Nombre_de_substances_chimiques_recensées"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Nombre de substances chimiques recensées</span> </div> </a> <ul id="toc-Nombre_de_substances_chimiques_recensées-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes_et_références" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes_et_références"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Notes et références</span> </div> </a> <ul id="toc-Notes_et_références-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voir_aussi" class="vector-toc-list-item vector-toc-level-1 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class="vector-toc-numb">4.2</span> <span>Liens externes</span> </div> </a> <ul id="toc-Liens_externes-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Sommaire" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table des matières" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Basculer la table des matières" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Basculer la table des matières</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Chemical Abstracts Service</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Aller à un article dans une autre langue. Disponible en 23 langues." > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-23" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">23 langues</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AE%D8%AF%D9%85%D8%A9_%D8%A7%D9%84%D9%85%D8%B3%D8%AA%D8%AE%D9%84%D8%B5%D8%A7%D8%AA_%D8%A7%D9%84%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A6%D9%8A%D8%A9" title="خدمة المستخلصات الكيميائية – arabe" lang="ar" hreflang="ar" data-title="خدمة المستخلصات الكيميائية" data-language-autonym="العربية" data-language-local-name="arabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – bulgare" lang="bg" hreflang="bg" data-title="Chemical Abstracts Service" data-language-autonym="Български" data-language-local-name="bulgare" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – catalan" lang="ca" hreflang="ca" data-title="Chemical Abstracts Service" data-language-autonym="Català" data-language-local-name="catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – danois" lang="da" hreflang="da" data-title="Chemical Abstracts Service" data-language-autonym="Dansk" data-language-local-name="danois" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – allemand" lang="de" hreflang="de" data-title="Chemical Abstracts Service" data-language-autonym="Deutsch" data-language-local-name="allemand" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – anglais" lang="en" hreflang="en" data-title="Chemical Abstracts Service" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – espagnol" lang="es" hreflang="es" data-title="Chemical Abstracts Service" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AE%D8%AF%D9%85%D8%A7%D8%AA_%DA%86%DA%A9%DB%8C%D8%AF%D9%87%E2%80%8C%D9%87%D8%A7%DB%8C_%D8%B4%DB%8C%D9%85%DB%8C" title="خدمات چکیده‌های شیمی – persan" lang="fa" hreflang="fa" data-title="خدمات چکیده‌های شیمی" data-language-autonym="فارسی" data-language-local-name="persan" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – finnois" lang="fi" hreflang="fi" data-title="Chemical Abstracts Service" data-language-autonym="Suomi" data-language-local-name="finnois" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Seirbh%C3%ADs_na_gCoimrithe_Ceimiceacha" title="Seirbhís na gCoimrithe Ceimiceacha – irlandais" lang="ga" hreflang="ga" data-title="Seirbhís na gCoimrithe Ceimiceacha" data-language-autonym="Gaeilge" data-language-local-name="irlandais" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – hébreu" lang="he" hreflang="he" data-title="Chemical Abstracts Service" data-language-autonym="עברית" data-language-local-name="hébreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/SciFinder" title="SciFinder – croate" lang="hr" hreflang="hr" data-title="SciFinder" data-language-autonym="Hrvatski" data-language-local-name="croate" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – indonésien" lang="id" hreflang="id" data-title="Chemical Abstracts Service" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésien" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – italien" lang="it" hreflang="it" data-title="Chemical Abstracts Service" data-language-autonym="Italiano" data-language-local-name="italien" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Chemical_Abstracts" title="Chemical Abstracts – japonais" lang="ja" hreflang="ja" data-title="Chemical Abstracts" data-language-autonym="日本語" data-language-local-name="japonais" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%BC%80%EB%AF%B8%EC%BB%AC_%EC%95%A0%EB%B8%8C%EC%8A%A4%ED%8A%B8%EB%9E%99%ED%8A%B8_%EC%84%9C%EB%B9%84%EC%8A%A4" title="케미컬 애브스트랙트 서비스 – coréen" lang="ko" hreflang="ko" data-title="케미컬 애브스트랙트 서비스" data-language-autonym="한국어" data-language-local-name="coréen" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/CAS_nr" title="CAS nr – néerlandais" lang="nl" hreflang="nl" data-title="CAS nr" data-language-autonym="Nederlands" data-language-local-name="néerlandais" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – norvégien bokmål" lang="nb" hreflang="nb" data-title="Chemical Abstracts Service" data-language-autonym="Norsk bokmål" data-language-local-name="norvégien bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – polonais" lang="pl" hreflang="pl" data-title="Chemical Abstracts Service" data-language-autonym="Polski" data-language-local-name="polonais" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – portugais" lang="pt" hreflang="pt" data-title="Chemical Abstracts Service" data-language-autonym="Português" data-language-local-name="portugais" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – russe" lang="ru" hreflang="ru" data-title="Chemical Abstracts Service" data-language-autonym="Русский" data-language-local-name="russe" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Chemical_Abstracts_Service" title="Chemical Abstracts Service – ukrainien" lang="uk" hreflang="uk" data-title="Chemical Abstracts Service" data-language-autonym="Українська" data-language-local-name="ukrainien" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a 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class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Un article de Wikipédia, l'encyclopédie libre.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="fr" dir="ltr"><div class="bandeau-container metadata homonymie hatnote"><div class="bandeau-cell bandeau-icone" style="display:table-cell;padding-right:0.5em"><span class="noviewer" typeof="mw:File"><a href="/wiki/Aide:Homonymie" title="Aide:Homonymie"><img alt="Page d’aide sur l’homonymie" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/20px-Logo_disambig.svg.png" decoding="async" width="20" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/30px-Logo_disambig.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/40px-Logo_disambig.svg.png 2x" data-file-width="512" data-file-height="375" /></a></span></div><div class="bandeau-cell" style="display:table-cell;padding-right:0.5em"> <p>Pour les articles homonymes, voir <a href="/wiki/CAS" class="mw-disambig" title="CAS">CAS</a>. </p> </div></div> <div class="infobox_v3 infobox infobox--frwiki noarchive large"><div class="entete defaut" style="background-color:#323996;color:#FFF"><div>Chemical Abstracts Service</div></div><div><div class="images" style="padding:2px 0"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/Fichier:CAS_pelotonia.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/CAS_pelotonia.jpg/330px-CAS_pelotonia.jpg" decoding="async" width="260" height="195" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/CAS_pelotonia.jpg/500px-CAS_pelotonia.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fc/CAS_pelotonia.jpg/520px-CAS_pelotonia.jpg 2x" data-file-width="640" data-file-height="480" /></a></span></div><div class="legend">Bureaux de CAS.</div></div><table><caption style="color:#FFF;text-align:center;background-color:#323996">Histoire</caption><tbody><tr class=""><th scope="row">Fondation</th><td class=""><div> <span class="wd_p571"><time datetime="1907" data-sort-value="1907" class="date-lien"><a href="/wiki/1907" title="1907">1907</a></time><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P571" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr></tbody></table><table><caption style="color:#FFF;text-align:center;background-color:#323996">Cadre</caption><tbody><tr class=""><th scope="row">Sigle</th><td class=""><div> <span class="wd_p1813"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <span class="lang-en" lang="en">CAS</span><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P1813" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Type</th><td class=""><div> <span class="wd_p31"><a href="/wiki/Maison_d%27%C3%A9dition" title="Maison d'édition">Maison d'édition</a>, <a href="/wiki/Syst%C3%A8me_d%27information" title="Système d'information">système d'information</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P31" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Siège</th><td class=""><div> <span class="wd_p159"><a href="/wiki/Columbus_(Ohio)" title="Columbus (Ohio)">Columbus</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P159" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Pays</th><td class=""><div> <span class="wd_p17"><span class="flagicon"><span class="mw-image-border noviewer" typeof="mw:File"><a href="/wiki/Fichier:Flag_of_the_United_States.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Flag_of_the_United_States.svg/20px-Flag_of_the_United_States.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Flag_of_the_United_States.svg/30px-Flag_of_the_United_States.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Flag_of_the_United_States.svg/40px-Flag_of_the_United_States.svg.png 2x" data-file-width="1235" data-file-height="650" /></a></span></span> <a href="/wiki/%C3%89tats-Unis" title="États-Unis">États-Unis</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P17" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr></tbody></table><table><caption style="color:#FFF;text-align:center;background-color:#323996">Organisation</caption><tbody><tr class=""><th scope="row">Organisation mère</th><td class=""><div> <span class="wd_p749"><a href="/wiki/American_Chemical_Society" title="American Chemical Society">Société américaine de chimie</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P749" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr><tr class=""><th scope="row">Site web</th><td class=""><div> <span class="wd_p856"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://www.cas.org">www.cas.org</a><span class="noprint wikidata-linkback skin-invert"><span class="mw-valign-baseline noviewer" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q911173?uselang=fr#P856" title="Voir et modifier les données sur Wikidata"><img alt="Voir et modifier les données sur Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></span></span></div></td></tr></tbody></table><p class="navbar noprint bordered navigation-not-searchable" style="border-top:1px solid#323996"><span class="plainlinks" style="text-align:left"><a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=0">modifier</a> - <a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=0">modifier le code</a> - <a href="https://www.wikidata.org/wiki/Q911173" class="extiw" title="d:Q911173">modifier Wikidata</a></span><span style="text-align:right"><span typeof="mw:File"><a href="/wiki/Mod%C3%A8le:Infobox_Organisation2" title="Documentation du modèle"><img alt="Documentation du modèle" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/12px-Info_Simple.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/18px-Info_Simple.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/24px-Info_Simple.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></span></p></div> <p><b><span class="lang-en" lang="en">Chemical Abstracts Service</span></b> (CAS) est une division de l'<span class="lang-en" lang="en"><a href="/wiki/American_Chemical_Society" title="American Chemical Society">American Chemical Society</a></span> (ACS) qui produit un index (les <i><b><span class="lang-en" lang="en">Chemical Abstracts</span></b></i>, littéralement les <i>résumés de chimie</i>) de la littérature scientifique concernant la <a href="/wiki/Chimie" title="Chimie">chimie</a> et les domaines apparentés. Les <i><span class="lang-en" lang="en">Chemical Abstracts</span></i>, publiés dès <a href="/wiki/1907" title="1907">1907</a>, sont l'index le plus long dans la littérature. </p><p>Pour tous les journaux de chimie ou d'intérêt pour la chimie, chaque article est lu et résumé en quelques lignes en anglais et les <a href="/wiki/Compos%C3%A9_chimique" title="Composé chimique">composés chimiques</a> sont répertoriés, et ce depuis n'importe quelle langue. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Recherche_bibliographique_avant_l'avènement_de_l'informatique"><span id="Recherche_bibliographique_avant_l.27av.C3.A8nement_de_l.27informatique"></span>Recherche bibliographique avant l'avènement de l'informatique</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=1" title="Modifier la section : Recherche bibliographique avant l'avènement de l'informatique" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=1" title="Modifier le code source de la section : Recherche bibliographique avant l'avènement de l'informatique"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Depuis 1907 jusqu'au début des années 1990, une recherche bibliographique en chimie se devait de passer par le <i><span class="lang-en" lang="en">Chemical Abstracts</span></i> mais, pour des questions de coût et d'équipement, l'accès informatique à la base de données CAS ne s'est popularisé que pendant la deuxième moitié de la <span class="nowrap">décennie 1990</span>. </p><p>CAS entretient également le <a href="/w/index.php?title=Registre_CAS&action=edit&redlink=1" class="new" title="Registre CAS (page inexistante)">registre CAS</a>, une base de données de substances chimiques significatives. Chaque substance de cette base de données reçoit un <a href="/wiki/Num%C3%A9ro_CAS" title="Numéro CAS">numéro CAS</a>, et ces nombres sont souvent utilisés pour décrire de manière unique les substances chimiques. Les substances reçoivent de plus un <a href="/w/index.php?title=Nom_d%27index_CA&action=edit&redlink=1" class="new" title="Nom d'index CA (page inexistante)">nom d'index CA</a> unique qui est construit en suivant des règles de <a href="/wiki/Nomenclature_syst%C3%A9matique" title="Nomenclature systématique">nomenclature</a> très strictes. Dans le but de faciliter la recherche de composés apparentés, le groupement fonctionnel le plus important de la substance est nommé en premier, suivi des modifications ; il y a quelques autres différences entre les noms d'index CA et la <a href="/wiki/Nomenclature_de_l%27UICPA" title="Nomenclature de l'UICPA">nomenclature de l'UICPA</a>. </p><p>Les diverses bases de données créées par le CAS sont la propriété de CAS et vendues à des entreprises ou des bibliothèques universitaires. CAS est situé à <a href="/wiki/Columbus_(Ohio)" title="Columbus (Ohio)">Columbus</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Nombre_de_substances_chimiques_recensées"><span id="Nombre_de_substances_chimiques_recens.C3.A9es"></span>Nombre de substances chimiques recensées</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=2" title="Modifier la section : Nombre de substances chimiques recensées" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=2" title="Modifier le code source de la section : Nombre de substances chimiques recensées"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En <time class="nowrap" datetime="2017-01" data-sort-value="2017-01">janvier 2017</time>, le registre répertorie 126 183 668 substances différentes, organiques ou non organiques<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>. En <time class="nowrap" datetime="2018-05" data-sort-value="2018-05">mai 2018</time> ce nombre était de <span class="nowrap">142 millions</span> de substances chimiques<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. </p> <div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=3" title="Modifier la section : Notes et références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=3" title="Modifier le code source de la section : Notes et références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small decimal" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a> </span><span class="reference-text"><a href="/wiki/Laurent_Testot" title="Laurent Testot">Laurent Testot</a>, <i>Cataclysmes - Une histoire environnementale de l'humanité</i>, éd. Payot, <abbr class="abbr" title="page">p.</abbr> 403.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a> </span><span class="reference-text"><span class="ouvrage"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> « <a rel="nofollow" class="external text" href="https://www.cas.org/about/cas-content"><cite style="font-style:normal;" lang="en">CAS Content</cite></a> », sur <span class="italique">CAS</span> <small style="line-height:1em;">(consulté le <time class="nowrap" datetime="2023-11-18" data-sort-value="2023-11-18">18 novembre 2023</time>)</small></span>.</span> </li> </ol></div> </div> <div class="mw-heading mw-heading2"><h2 id="Voir_aussi">Voir aussi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=4" title="Modifier la section : Voir aussi" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=4" title="Modifier le code source de la section : Voir aussi"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Articles_connexes">Articles connexes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=5" title="Modifier la section : Articles connexes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=5" title="Modifier le code source de la section : Articles connexes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Num%C3%A9ro_CAS" title="Numéro CAS">Numéro CAS</a> (information détaillée)</li> <li><a href="/wiki/Base_de_donn%C3%A9es_chimiques" title="Base de données chimiques">Base de données chimiques</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="Liens_externes">Liens externes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chemical_Abstracts_Service&veaction=edit&section=6" title="Modifier la section : Liens externes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Chemical_Abstracts_Service&action=edit&section=6" title="Modifier le code source de la section : Liens externes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="ouvrage" id="site_officiel" style="font-style: normal;"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="https://www.cas.org/">Site officiel</a></cite></li></ul> <div class="navbox-container" style="clear:both;"> <table class="navbox collapsible noprint autocollapse" style="background:white"> <tbody><tr><th class="navbox-title" colspan="3" style=""><div style="float:left; width:6em; text-align:left"><div class="noprint plainlinks nowrap tnavbar" style="padding:0; font-size:xx-small; color:var(--color-emphasized, #000000);"><a href="/wiki/Mod%C3%A8le:Palette_Columbus" title="Modèle:Palette Columbus"><abbr class="abbr" title="Voir ce modèle.">v</abbr></a> · <a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Mod%C3%A8le:Palette_Columbus&action=edit"><abbr class="abbr" title="Modifier ce modèle. 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