Can anybody give me a sense of how ACGIH can support many of our needs?
Jim Wasil
Cochair CERM2020
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
On Behalf Of Jim Stewart
Sent: Friday, October 18, 2019 12:40 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] LD50 Source Data
RTECS: The Registry of Toxic Effects of Chemical Substances is a toxicology database is compiled, maintained by NIOSH is a great source.The link to
the NIOSH site where RTECS is discussed is:
If you access RTECS there will be a charge because NIOSH has retailers working with them who actually provide access. If you want RTECS information for a specific compound/element I recommend the "NIOSH Pocket Guide" because there is an
entry in the chemical's record containing a direct link to that particular RTECS record for that chemical and it is free when accessed in this manner. The link to the methylene chloride record in the "Pocket Guide" is:
There are other sources of values such as the LD50 like HSDB, DART and others available on TOXNET (free).
James H. Stewart, Ph.D., CIH, CSP
Does anyone know where to find the studies/source data for LD50 values listed in SDSs? I'm specifically looking for studies/data on the reproductive/developmental hazards of methylene
chloride and N-methyl-2-pyrrolidone (CAS # 872-50-4). Is there a database somewhere or does each manufacturer keep its source data in-house?
Thanks!
Nora Dunkel
Chemical Safety Officer
Webster University
314 246 2244
661 348 1445
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