Tobacco Documents Online

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RTECS 1 INTRODUCTION In September 1977, NLM added the 1976 edition of the data retrieval file known as the Registry of Toxic Effects of Chemical Substances (RTECS) to its family of online services. RTECS is structured around individual chemical records of substances with toxic action: The original collection of data that makes up the Registry of Toxic Ef;ects of Chemical Substances was known as the Toxic Substances List, compiled in 1971 by the National Institute tor Occupational Safety and Health (NIOSH) in response to the Occupational Safety and Health Act of 1970. The hard copy version of RTECS is updated annually with quarterly microfiche editions available. The current ONLINE version is based on the 1979 printed edition plus quarterly updates. It contains toxicity data for approximately 53,000 substances (4/82). RTECS is a single source document for basic toxicity Information. RTECS includes toxicity data from a variety of printed sources, threshold lirtiit values, aquatic toxicity ratings, air standards, NCI carcinogenic bioassay information, toxicological/carcinogenic review information, compound classification, and NIOSH Criterion Document availabilty. It is especially useful for retrieving information on a group of compounds or identifying a group of substances on the basis of a selected effect or criterion. Online RTECS gives the user the flexibility of interactive searching and retrieval which can allow focus on subsets of data and data tailored to specific needs. The telephone number for questions on the system, communication problems, program interpretation, etc., is (301) 496-6193 or (800) 638-8480 (toll free). The telephone number for technical assistance in RTECS search strategy, etc., is (301) 496-1131.

3 RTECS UNIT RECORD PRINT OPTIONS SEARCH PRINT S F T D MNEM. DATA ELEMENT MNEM. D U D L (SI) CHEMICAL IDENTIFICATION DATA: Secondary Source ID SI X X X X (N1) CAS Type 1 Name N1 X X X X (SY) Synonyms SY - - - X (NF) Name Fragments - - - - (RN) CAS Registry Number RN X X X X (CC) Classification Code CC - - • X (MF) Molecular Formula MF • - - X (FF) Formula Fragments - - - - Molecular Weight MW - - - X (WL) Wiswesser Line Notation WL - - - X (EM) Entry Month EM - - - X (IX) 'TOXICITY DATA AND SOURCES: Toxicity Data Index String TDKW - X X X (CW) Toxic Data Source SO - X X X STANDARDS, REGULATIONS, AND ADDITIONAL TOXICOLOGICAL DATA: (TW) Chemical Definition CDEF - , - X (TW) Aquatic Toxicity Rating AQ - X - X (TW) Toxicology & Cancer Review TR - X - X (TW) Standards & Regulations SR - X - X (TW) NIOSH Criteria Documents NC - X - X (TW) Status ST - X - X •Note, only the hit sources and/or their associated index strings print unless "COMPLETE" is added to the following print commands, "PRT FU", "PRT DL", "PRT TD", "PRT-TDKW", and "PRT SO".