From: Monona Rossol <0000012821515289-dmarc-request**At_Symbol_Here**>
Subject: Re: [DCHAS-L] Fiber dye disposal?
Date: Wed, 6 Jul 2016 16:19:15 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 155c1dd51da-5ded-166a5**At_Symbol_Here**
In-Reply-To <8BDAC66C-69B6-4E7B-A500-85F590EE2D09**At_Symbol_Here**>

Dyes, as you know, can be thought of as having two chemical parts, the "use class" part which determines how the dye grabs the textiles.  This part can be any of 14 types with the "reactive" class as one of them.

The other part of the dye imparts color.  The chromophore portion can be just about any of the dye chemical classes--azo, anthraquinone, aniline, and on and on..  So without a Colour Index name  or some other identification, there is no way you can know what you have there.

I find chemists often do not know about the Colour Index identification system.  But it is about the most reliable unless the dye is so new it hasn't been assigned a name and number.  Look on the SDSs for identifiers such as "C.I. Reactive Red 75."    Then I can look them up for you and maybe even get a peek at their structure.

It is the dyes that make me so aware of the inadequacy of EPA's regulations since many of these dyes break down into chemicals known to cause cancer.  That's why the E.U. Dye Directive is so brilliant.  With about 3000 commercially available dyes, testing them all out of the question.  So they just look to the structure, and if it can be metabolized to any of 22 carcinogens, the dye is banned for use next to the skin.

If Dharma is NOT identifying the dyes, the art department should be switching to a supplier that does. How do you assess risk and choose precautions when you don't know what the chemical is?

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: Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
Sent: Wed, Jul 6, 2016 2:02 pm
Subject: [DCHAS-L] Fiber dye disposal?

I wonder if anyone has looked into the disposal of fiber dyes used in student activities events?

The particular brand I'm interested in is from Dharma Trading Company and their SDS's are remarkably uninformative. The SDSs states
Waste Disposal Methods: Should not be released into the environment. Dispose of in accordance with local regulations. This material, as supplied, is not a hazardous waste according to state and federal regulations (40 CFR 261).

The local sewage authority would like to know if there are metals in the dyes, but the company representative only knows what's on the SDS that came with the powder they bought from their supplier, so I would like to have a source of corroborative information for the SDS before I respond to the city.. Any suggestions for other sources of information would be appreciated.

Thanks for any information on this.

- Ralph

Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College


Previous post   |  Top of Page   |   Next post

The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.