CHEMINFO, Registry Numbers

RN (registry number) is the CAS number assigned to each chemical substance. This number makes comprehensive retrieval of sources possible in an online database.

Books

It is difficult and inefficient to find the sources containing RN's in the PAC (online card catalog). Instead, check other selections in this section.

Databases

Chemname: A chemical name dictionary. Contains information about chemical substances. Provides RNs, molecular formulas, synonyms, and ring data. Available on the Dialog online database system as Chemsearch.
Chemline: A chemical dictionary available online. Includes approximately 500,000 chemicals indexed in the NLM databases. Contains and may be searched by registry numbers. Available on the National Library of Medicine database system. To search this database consult a Reference Librarian.
Registry File: A dictionary database containing data on chemical substances. Includes molecular formula, synonyms, structure, and registry numbers. Available on the STN online database system. To search this database consult a Reference Librarian.
Toxicology Data Network System (TOXNET): An online database consisting of several biblio- graphic and data files concerning toxic materials. Use of the registry number makes it possible to search and retrieve information from several files at the same time. Available on the NLM system of databases. To search this database consult a Reference Librarian.

Indexes

Chemical Abstracts. Index Guide.: A reference for searching Chemical Abstracts for chemical substances and topics. Links names used in the literature with the controlled terminology of the volume indexes. Includes RNs.

Journals

Inorganic Chemistry, 1962-to date. QD 1 I615 Periodicals and on microfiche (Science Microforms C-203): Covers bio-inorganic, catalytic, organometallic, solid state, synthetic chemistry and reaction dynamics. Includes registry numbers for the chemical discussed at the end of the articles.
Journal of Organic Chemistry, 1936-to date. QD 241 J6 Periodicals and on microfiche (Science Microforms C-205): Provides registry numbers for some of the substances discussed at the end of the articles.

Dictionaries

Dictionary of Organic Compounds. 6th ed. New York: Chapman and Hall, 1996. (9 volumes) QD 251 H45 1982 5th Floor Books: Covers organic compounds, natural products, solvents and reagents, tautomeric compounds. Has numerous indexes. The Registry Number Index lists RNs in ascending order, also giving chemical name and location number. Notes toxic and hazardous materials.
Encyclopedia of Chemical Technology. 4th ed. New York: Wiley, 1991-to date. (26 volumes) TP 9 E685 1991 Ref/Table 9: An authoritative work providing information on the most recent chemical technology. Contains CAS registry numbers and SI units. Also available online.
Medical Subject Headings: Supplementary Chemical Records. Washington, DC: GPO, 19-. R735 .M43e Reference: Contains records of approximately 21,000 chemicals, arranged alphabetically by name of the substance. Includes RNs.
Merck Index. 11th ed. Rahway, NJ: Merck, 1889-to date. RS 51 M4 1989 5th Floor Books: Describes chemicals, drugs, and biological substances. Provides data on the compound, its bibliographic history and structure. Contains a number of indexes, including CAS registry number index arranged by name and RNs.

Handbooks

Registry Handbook (Number Section). Columbus, OH: American Chemical Society, 19-.: Contains registry numbers of specific chemical substances, CA index names and molecular formulas. (Library does not have all volumes.)