A word of warning. If you do use dichloromethane (aka methylene chloride,
methane dichloride, methylene dichloride) make sure that there are no
naked flames in the vicinity (eg when welding, heat treating and
particularly smoking) and that the area is well ventilated as the first
world war poison gas phosgene can be created and even low levels can cause
permanent lung damage which is cumulative. eg see:

https://www.dhs.wisconsin.gov/chemical/mthychlrde.htm
http://www.ncbi.nlm.nih.gov/pubmed/10976684
http://www.inchem.org/documents/hsg/hsg/hsg006.htm

and as can be seen about a third of the way down the wikipedia page its
conversion to phosgene and subsequent reaction with a copper reacion plate
was used by refrigerant plant engineers to test for leaks:
https://en.wikipedia.org/wiki/Phosgene

Just be aware and careful.

Alan

--


Using an ARMX6

Alan Dawes wrote:
A word of warning. If you do use dichloromethane (aka methylene chloride,
methane dichloride, methylene dichloride) make sure that there are no
naked flames in the vicinity (eg when welding, heat treating and
particularly smoking) and that the area is well ventilated as the first
world war poison gas phosgene can be created and even low levels can cause
permanent lung damage which is cumulative. eg see:

https://www.dhs.wisconsin.gov/chemical/mthychlrde.htm
http://www.ncbi.nlm.nih.gov/pubmed/10976684
http://www.inchem.org/documents/hsg/hsg/hsg006.htm

and as can be seen about a third of the way down the wikipedia page its
conversion to phosgene and subsequent reaction with a copper reacion plate
was used by refrigerant plant engineers to test for leaks:
https://en.wikipedia.org/wiki/Phosgene

Just be aware and careful.

Alan


When I was a lad, and we'd all meet up and fix our old motorbikes in a
friends garage, we'd use dichloromethane and trichloromethane to clean
the bits because his dad could get loads of it as he worked at the local
ICI. In winter, we'd have a Primus stove blazing away in an attempt to
warm the place up, and it was clear from the smell that something
unpleasant was being created.

These days, I even notice something similar, but less irritating, if
I've been painting, and then turn on a gas hob in the kitchen.