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Re: Substitutes for TCE in Stainless Steel Piping


NMP does appear to work as a TCE substitute for many applications. But the problem with n-methyl pyrrolidone is that the toxicological effects haven't really been studied thoroughly, though it's a known developmental toxin. And IPA is, of course, a fire hazard (a class two fire hazard, I believe).

Here are some resources I found in our library: ("Greenlist" at    www.turi.org)

NMP Added to the Prop 65 List Source:
Chemical Week, Aug. 22, 2001, Vol 163, no. 29, p. 41
Published by A Chemical Week Associates Publications Publication Date:
2001 Media Type:
Journal or Magazine article Complete Abstract:
California EPA (Sacramento) has added the industrial solvent N-methylpyrrolidone to the list of chemicals that require warning labels under state's Proposition 65 rule. NPM producers, including BASF, International Speciality Products, and Lyondell Chemical, will have to warn coustmers beginning june 15, 2002 that NPM is "known to cause developmental toxicity". NPM is used to clean components in the electronics industry and machine parts.

Demonstration of n-methyl pyrrolidone (NMP) as a Pollution Prevention Alternative to Paint Stripping with Methylene Chloride
Journal of Cleaner Production, 1999, vol. 7, no. 5, pp. 331-339 (Journal or Magazine article) 1999
The objective of this paper is to demonstrate that NMP is a viable pollution prevention alternative to methylene chloride. Maine Corps Logistics Base was the host site for the demonstration. MCLB's primary function is maintenance of military ground support vehicles,

Comparison of N-Methyl Pyrrolidone and MEK Solvents for Coating Industries Horan, D.C. Leaonard,K.M. International Journal of Environmentally Conscious Design and Manufacturing, Vol.6, No.1, 1997, Page 19-28 (Journal or Magazine article)

N-Methyl Pyrrolidone: Chemical Profile Olukemi Ajayi Elizabeth Harriman (Technical Paper) 1996
This report focuses on the chemical profile of N-Methyl Pyrrolidone (NMP) which includes its chemical and physical properties, its likely sources of presence in the environment, health hazards, methods of manufacture and uses, and also the exposure standards and

I can help you locate these resources if you can't find them. Let me know.

Good luck.
Todd MacFadden

At 03:20 PM 12/16/2002, you wrote:
Looking for an alternative to TCE for cleaning/flushing oil and grease from
steel piping (components of a compressed air system). IPA and NMP have been
suggested. Any good comprehensive sources that cover the pros and cons of IPA
and NMP?

thank you,
Debby Valin
P2 Coordinator

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Todd MacFadden
Training Specialist
Toxics Use Reduction Institute
One University Ave
Lowell, MA 01854

978.934.3050 (fax)


Because not everyone can live upstream.