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The underwriters laboratory flammability rating says acetone is more flammable. Don’t forget there are other solvents in gasoline especially in winter to make it more volatile so you can start your car easier.
Acetone is considered a ketone and some peoples bodies (diabetic) produce it when they have problems. You can actually smell it on their breath.
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, February 01, 2016 11:34 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Chemical Exposure.
The best source for understanding the hazards associated with various chemicals is the Material Safety Data Sheet (MSDS) for the material. These are based on guidelines and rules established by the Occupational Safety and Health Administration (OSHA). You can easily find these by Googling the MSDS for the chemical/material that you’re interested in. The MSDS for gasoline lists it as a class 1A flammable liquid. The MSDS for Acetone lists it as a class 1B flammable liquid. The difference between class 1A and class 1B flammability is the boiling temperature or volatility of the chemical. See https://www.osha.gov/dte/library/flammable_liquids/flammable_liquids.html . Materials with a lower boiling point (gasoline) generate more vapors at a given temperature than those with a higher boiling point (acetone). Vapors mixed with air (oxygen) are what create a highly flammable or explosive mixture.
So, per the MSDSs of these two, gasoline is more flammable than acetone.
However, the bottom line is both are highly flammable and you should be very careful in handling these.
Mike K5ESS
MSDS for gasoline https://bigcatrescue.org/wp-content/uploads/2014/04/Gasoline.pdf
MSDS for acetone http://physics.utsa.edu/memslab/MSDS/Acetone.pdf
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, February 01, 2016 4:20 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Chemical Exposure.
We all know how flammable gasoline is , there is a scale rating what is most flammable , with 1 being the most and 10 being the least. Gasoline comes in at number 6
Number one is acetone. A friend once told me it is so volatile if you threw a teaspoon of it up into the air it would not hit the ground. Best to work with that one and anything else you may breath outside if you can.
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, February 01, 2016 9:04 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Chemical Exposure.
I did chemistry up to tertiary level and my father was a Canadian
trained chemist...He is now blind in one eye and cannot smell AT ALL due
to constant exposure to these very same type of hi volatility chemicals.
My first job as a 'sales' engineer had me going to Paint companies to
promote filtration. The techs washed their paint smeared hands daily in
a concoction full of aromatic rings..benzene,xylene, toluene; acetone
was always there as well.
After working for a week with them I started to have problems smelling
things properly as well. I left that job.
My fellow hobbyists, you must be aware that frequent exposure to that
volatile stuff WILL penetrate your skin and breathing it in will get it
into your system. Don't compromise your long term wellness for a bit of
convenience. These chemicals are also a serious fire hazard and do not
mix well with nearby mechanical/electrical experiments creating little
sparks when prototyping or metal working. Even the internal arcing from
a Dremel drill can ignite a nearby open acetone bottle or solvent damp
paper towel. It may not happen the first 50 times you do it, but it can
happen anytime and once is enough to take out your lab.
I always wear safety glasses when dremeling, once when cutting off a
6-32 screw the cut piece shot straight into the safety glasses and
ricocheted off before I could even blink. Once in many years, but that
once would have cost me an eye without due care.
Use HP generic toner and one pass hot lamination guys...no fuss, no
muss... no long term risks.
This is how I do it...down to better than 10 mil accuracy.
https://hackaday.io/project/7938-pcb-smt-maker-lab-home
Ancel