NIOSH RTECS file

The only reported toxicity data on zinc fluoride in the NIOSH RTECS file is a LD q of 280 mg/kg for subcutaneous adniinistration in frogs. 

The RTECS data base can be searched in a number of ways, including NIOSH number, CAS Registry number, type of animal tested, route of dosage, LD50. LC50, etc. The NIOSH RTECS file is also linked to the SSS so that structure-activity correlation work can be performed. 

The command to do this is EXIM, which is short for EXact/IMbed switch. The search shown in Figure 11 reveals that there are 2715 compounds in the NIOSH RTECS file that contain at least this ring pattern. To filter such potentially broad responses further, one can use CIDS keys searches and other such constraints as shown below. 

In other cases, the Information comes from another Government Agency which retains responsibility for the file, its contents and its maintenance. An example of such a file is the NIOSH RTECS. 

NIOSH. 1984. Current awareness file. Registry of Toxic Effects of Chemical Substanees (RTECS). Cincinnati, OH U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health. 

RTECS Also available on microfiche and in book form (Registry of Toxic Effects of Chemical Substances List) is an annual compilation of unvalidated toxicity data prepared by the National Institute for Occupational Safety and Health (NIOSH). There is no back file. RTECS contains toxicity data for approximately 40,000 substances. Threshold limit values. 

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