Does it look like this - see: http://www.americanscientist.org/issues/pub/a-short-history-of-hydrogen-sulfide/
From: Demer, Frank R - (demer)
Sent: Monday, November 05, 2012 11:23 AM
To: 'DCHAS-L'
Subject: RE: [DCHAS-L] help w/ mystery scale on exterior of copper pipes
My guess - the scale is copper sulfide from copper reacting with hydrogen sulfide.
Frank R. Demer, MS, CIH, CSP
Health Safety Officer
Industrial Hygiene and Safety
University of Arizona
Department of Risk Management Services
Phone: 520.621.3585
Fax: 520.621.3706
Email: demer**At_Symbol_Here**email.arizona.edu
Mailing Address: P.O. Box 210300, Tucson, AZ 85721-0300
Street Address: 220 W. 6th St., Tucson, AZ 85701 (2nd floor, East Bldg.)
Web Address: risk.arizona.edu
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU]On Behalf Of scrooks**At_Symbol_Here**PPEPPRO.COM
Sent: Monday, November 05, 2012 10:02 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] help w/ mystery scale on exterior of copper pipes
I was recently asked to look at a dark blue scale appearing on the exterior of some copper piping and determine possible causes and if any human health risk is likely. I am asking here primarily for anyone who's possibly seen this blue scale appear in similar installation. I don't want to take anyone's time going deep as this is a paid consulting task and I do have access to other resources (and this one appears complicated.) This group has seen and experienced so much collectively though that I couldn't pass it up as a great sounding board. Then again, most on this list are being rewarded in some manner through the advice, ideas and answers obtained through the group so my shame isn't too unbearable.
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