Editing CAS Registry Number (section)

== Search engines ==
* CHEMINDEX Search via [[Canadian Centre for Occupational Health and Safety]]<ref name="cis">{{cite web|author=Canadian Centre for Occupational Health and Safety|author-link=Canadian Centre for Occupational Health and Safety|title=CHEMINDEX Search|url=http://ccinfoweb.ccohs.ca/chemindex/search.html|access-date=13 July 2009}}</ref>
* ChemIDplus Advanced via [[United States National Library of Medicine]]<ref name="adv">{{cite web|author=United States National Library of Medicine|author-link=United States National Library of Medicine|title=ChemIDplus Advanced|url=https://chem.nlm.nih.gov/chemidplus/|access-date=28 June 2021}}</ref>
* Common Chemistry<ref name="ss">{{cite web|author=American Chemical Society |author-link=American Chemical Society|title=Substance Search|url=http://www.commonchemistry.org/|access-date=8 July 2009}}</ref><ref>{{cite journal |last1=Jacobs |first1=Andrea |last2=Williams |first2=Dustin |last3=Hickey |first3=Katherine |last4=Patrick |first4=Nathan |last5=Williams |first5=Antony J. |last6=Chalk |first6=Stuart |last7=McEwen |first7=Leah |last8=Willighagen |first8=Egon |last9=Walker |first9=Martin |last10=Bolton |first10=Evan |last11=Sinclair |first11=Gabriel |last12=Sanford |first12=Adam |title=CAS Common Chemistry in 2021: Expanding Access to Trusted Chemical Information for the Scientific Community |journal=Journal of Chemical Information and Modeling |date=13 May 2022 |volume=62 |issue=11 |pages=2737–2743 |doi=10.1021/acs.jcim.2c00268 |pmid=35559614 |pmc=9199008 |s2cid=248778162 }}</ref> via Australian Inventory of Chemical Substances<ref name="adhg">{{cite web|author=National Industrial Chemicals Notification and Assessment Scheme|title=AICS Detailed Help / Guidance Notes|url=http://www.nicnas.gov.au/Industry/AICS/Search/AICS_Detailed_Help.asp#CAS_Number_Search|access-date=8 July 2009|url-status=dead|archive-url=https://web.archive.org/web/20090709011639/http://www.nicnas.gov.au/industry/AICS/Search/AICS_Detailed_Help.asp|archive-date=9 July 2009}}</ref>
* [[European chemical Substances Information System]]<ref name="eecs">{{cite web|author=European Commission Joint research Centre|title=ESIS : European chemical Substances Information System|url=http://esis.jrc.ec.europa.eu/|access-date=11 July 2009|url-status=dead|archive-url=https://web.archive.org/web/20140101220543/http://esis.jrc.ec.europa.eu/|archive-date=1 January 2014}}</ref> via the website of [[Royal Society of Chemistry]]<ref name="fcrn">{{cite web|author=Library & Information Centre|title=Finding a CAS Registry Number|url=http://www.rsc.org/Library/Features/Tips/CASNumbers.asp|access-date=11 July 2009}}</ref>
* HSNO Chemical Classification Information Database via [[Environmental Risk Management Authority]]<ref name="hcci">{{cite web|author=Environmental Risk Management Authority |author-link=Environmental Risk Management Authority|title=HSNO Chemical Classification Information Database|url=http://www.ermanz.govt.nz/Chemicals/ChemicalSearch.aspx|access-date=14 July 2009|url-status=dead |archive-url=https://web.archive.org/web/20090711220034/http://www.ermanz.govt.nz/Chemicals/ChemicalSearch.aspx |archive-date=11 July 2009}}</ref>
* Search Tool of Australian Inventory of Chemical Substances<ref name="ast">{{cite web|author=National Induscctrial Chemicals Notification and Assessment Scheme|title=AICS Search Tool|url=http://www.nicnas.gov.au/Industry/AICS/Search.asp|access-date=11 July 2009|url-status=dead|archive-url=https://web.archive.org/web/20090514095645/http://www.nicnas.gov.au/Industry/AICS/Search.asp|archive-date=14 May 2009}}</ref>
*USEPA CompTox Chemicals Dashboard<ref>{{Cite web|title=CompTox Chemicals Dashboard {{!}} Home|url=https://comptox.epa.gov/dashboard|access-date=2021-10-14|website=comptox.epa.gov}}</ref>