Homebrew PCBs

Len,
Sorry, I misstated that.  The site I visited the other day (Google
search on Tarn-X) simply stated that were "none reported" for
carcinogens on the MSDS.  I did not actually read the MSDS at that
time, but I found today where it is available: download at <
http://www.jelmar.com/msds.asp >.  Jelmar is the registered company on
the MSDS.You have to provide some information, which I did not care to do.

I did find the MSDS for the Tarn-X product I bought at the following
web address, provided through Cornell University: <
http://msds.ehs.cornell.edu/msds/siri/files/bzd/bzdgd.html >. (I got
there by Googling "MSDS").

The Tarn-X I bought is labeled "Tarn-X" and subtitled "Tarnish
Remover".  The MSDS link is for Tarn-X Wipe & Rinse, which is also a
subtitle on the 12 oz. bottle I bought.  The label does have a
precaution on the front label: "Caution: Irritant. Harmful if
swallowed.  See back lael for other precautions".  The back label has
a direction to WEAR HOUSEHOLD GLOVES (their caps, not mine; I presume
they mean rubber gloves).  The back label also says "Caution: Contains
thiourea, sulphuric acid, corrosion inhibitors and detergent. AVOID
CONTACT WITH SKIN AND EYES."

It goes on to say if swallowed, do not induce vomiting, and to keep
out of the reach of children.  Here's what we're looking for in terms
of carcinogens:

"WARNING: This product contains thiourea, a chemical known in the
state of California to cause cancer."

Here is the relevant info from the MSDS on carcinogens:

Health Hazards Data 
=======================================================
Route Of Entry Inds - Inhalation: NO
Skin: NO
Ingestion: NO
Carcinogenicity Inds - NTP: YES
IARC: YES
OSHA: NO
Effects of Exposure: EYES: CAN CAUSE SLIGHT TO MODERATE IRRITATION.
Explanation Of Carcinogenicity: SEE INGREDIENTS.
Signs And Symptions Of Overexposure: EYES: CAN CAUSE SLIGHT TO MODERATE
  IRRITATION.
Medical Cond Aggravated By Exposure: NONE
First Aid: INHALATION: REMOVE TO FRESH AIR. EYES: FLUSH W/WATER.
INGESTION:
  GIVE LUKE WARM WATER (PINT), DON'T INDUCE VOMITING. OBTAIN MEDICAL
ATTENTION
  IN ALL CASES.

From the Ingredients section of the MSDS:

Cas: 62-56-6
RTECS #: YU2800000
Name: THIOUREA (SUSP ANIMAL CARC BY IARC GROUP 2B; SUSPECTED
CARCINOGEN BY NTP)
	 *96-1*
% Wt: 6-7
EPA Rpt Qty: 10 LBS
DOT Rpt Qty: 10 LBS

I will be more precise in the future to prevent misleading statements.

Regards,
Ted

--- In Homebrew_PCBs@yahoogroups.com, Len Warner <yahoo@...> wrote:
>
> On Thu, 20 Apr 2006 at 00:07, kilocycles mumbled:
> 
> >Hmmm, the posted MSDS
> 
> Posted where? There's no Tarn-X MSDS or link to it
> that I can find in a search of messages since Jan 26th.
> 
> >for Tarn-X
> 
> Which Tarn-X? Tarn-X is a brand, not a product.
---snip---
> Last time I Googled it to find out what you guys were talking about
> I came up with _three_ products with three different formulations.
---snip--- 
> I wish you would be more precise. Identify the product then go to the
> specific MSDS. Chemistry doesn't seem to be our forte. :-(
> 
> 
> Regards, LenW
---snip---