DCHAS-L Discussion List Archive
From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Common industrial lab safety practices 1906-1930?
Date: Sat, 10 Jun 2017 21:18:46 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 15c94bb5d9f-2a77-511f**At_Symbol_Here**webprd-m08.mail.aol.com
In-Reply-To
The structure of real indigo, whether natural or synthetic, does not resemble a benzidine dye. It looks more like a two halves of an anthraquinone with double bonded oxygens and --NH2 groups on the para positions. And it certainly is not regulated as a benzidine. In the Colour Index it comes at the end of the very large anthraquinone class section with C.I. number being 73000 when synthetic and 75780 when it is natural.
The true diazo benzidine dye Colour Index constitution numbers are in the range of 20000 to 29999 and up to 38000 if you add in the o-toluidine, diansidine, and triazo structures.
But back then, they may have been manufacturing a benzidine dye that looked like indigo. In the 50s and 60s, the large portion of the commercial dyes were benzidine.
Monona Rossol, M.S., M.F.A., Industrial Hygienist
President: Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
181 Thompson St., #23
New York, NY 10012 212-777-0062
-----Original Message-----
From: Michael <mabuczynski**At_Symbol_Here**HOTMAIL.COM>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Sat, Jun 10, 2017 7:26 pm
Subject: Re: [DCHAS-L] Common industrial lab safety practices 1906-1930?
My father in law was employed as an electrician at Allied Chemicals Buffalo Color in the 50s and 60s. They were the only site that made indigo dye for denim fabric. Benzidene based dye. He retired at 65 and barely made it to 69 when he died of cancer at
multiple organ sites. They could not determine the first site
Peter,
You might look at the orginal version of Alice Hamilton.M.D.'s (I think 1928) called "Exploring the Dangerous Trades". I'll bet you could find a re-issed version on Amazon.
She was actually the "mother" of Occupational Medicine in the US, the first Woman to be on the faculty of the Harvard School of Public Health, and came from Indiana (not too far from where I gew up and went to medical school). A fascinating read about
the time when workers and employers seemed to accept that work just wore out workers and this was acceptable (NOT!).
I believe there was some discussion of the munitions and dye industries in there. It's been some time since I read it in full.
Then her collaboration with Elizabeth Hardy (who began what we know know of berrylium toxicty) and thier early publications might yield some insights.
2 cents worth.
Alan
Alan H. Hall, M.D.
Medical Toxicologist
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