CAS Source Index (CASSI) Search Tool
Quickly identify or confirm journal titles and ISO Standard Abbreviations for publications indexed by CAS since 1907, including journals, conference proceedings, technical reports, etc. Search by Title, Abbreviation, CODEN, ISBN, or ISSN.
Note that there is a limit of 50 answers per search. It compliments the print CASSI [Z5523 A524] which includes library holdings, etc.