tcplCode2CASN {tcpl}

Convert chemical code to CAS Registry Number

Description

tcplCode2CASN takes a code and converts it CAS Registry Number.

Usage

tcplCode2CASN(code)

Arguments

code

Character of length 1, a chemical code

Details

The function checks for the validity of the CAS Registry Number. Also, the ToxCast data includes chemicals for which there is no CASRN. The convention for these chemicals is to give them a CASRN as NOCAS_chid; the code for these compounds is CNOCASchid. The function handles the NOCAS compounds as they are stored in the database, as shown in the example below.

Value

A CAS Registry Number.

Examples

tcplCode2CASN("C80057")
tcplCode2CASN("C09812420") ## Invalid CASRN will give a warning
tcplCode2CASN("CNOCAS0015") ## The underscore is reinserted for NOCAS codes