On Mon, 22 Oct 2018 16:35:54 -0400, Phil Hobbs
wrote:

On 10/21/18 11:42 PM, Jeff Liebermann wrote:
On Sun, 21 Oct 2018 21:30:37 -0500, Fox's Mercantile
wrote:

On 10/21/18 7:44 PM, Jeff Liebermann wrote:
The recommendation of using WD-40 is controversial.

I refuse to use WD-40 for anything on equipment other than
removing adhesive residue.

I use Goof-Off, which is 25% to 50% mineral spirits. My thinking is
anything that stinks that bad must be powerful stuff.

Goof-off has n-methyl 2-pyrrolidone (NMP) in it, and that stuff goes
through your skin super fast. It's not especially dangerous as organic
solvents go, but still it's best to wear gloves.

Sorta, kinda, maybe. Goof-Off is the brand name, which includes a
variety of products:
https://goofoffproducts.com/products/
I should have been more specific. I use Goof Off Gunk and Adhesive
Remover:
https://goofoffproducts.com/product/...remover-12-oz/
I use it for removing labels, not for cleaning switch contacts.

The MSDS shows no sign of NMP but does contain oleic acid, ethanol,
ethylene glycol (anti-freeze), ether, limonene, and benzyl alcohol.
https://goofoffproducts.com/wp-content/uploads/2017/08/GunkAdhesiveRemoverMSDS.pdf
One of these is probably as bad as NMP because when I use it without
gloves, my hand still reek from the stuff and feel oily hours later,
even if I wash my hands several times. I've also ruined at least two
computer keyboards when the solvents removed the white lettering from
the keycaps, even though I thought I had thoroughly washed my hands.

Goof-Off does make one product with NMP. Their Pro Stength Super Glue
Remover contains NMP:
https://goofoffproducts.com/product/pro-strength-super-glue-remover-4-oz/
https://goofoffproducts.com/wp-content/uploads/2017/08/ProStrengthSuperGlueRemoverMSDS.pdf
There might be other Goof-Off products that use NMP, but I didn't feel
like going through all the MSDS documents.

An EPA report on NMP use, mfg, distribution, processing, disposal,
etc. See Pg 3 through 13 for other products that contain NMP:
https://www.epa.gov/sites/production/files/2017-02/documents/nmp.pdf

As you mention, it doesn't appear to be very toxic:
https://en.wikipedia.org/wiki/N-Methyl-2-pyrrolidone
https://www.epa.gov/sites/production/files/2015-04/documents/methyl.pdf

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558