Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "mikezcnc" <eemikez@c...> wrote:
> IPA is carcinogenic, Stefan. I'm glad your post allowed me to raise 
> this issue. 
> 
> Mike
> 
>
http://www.osha.gov/SLTC/healthguidelines/isopropylalcohol/recognition.html

Not to minimize the dangers, which do exist, but the website you gave
has this to say:

"Mice exposed by inhalation to 3,000 ppm isopropyl alcohol for 5
days/week, 3 to 7 hours/day for 5 to 8 months did not develop tumors,
and isopropyl alcohol skin painting and subcutaneous injection studies
in mice also failed to demonstrate tumorigenic activity [Clayton and
Clayton 1982]."

And further:

"Epidemiological studies suggested an association between isopropyl
alcohol and paranasal sinus cancer; however, subsequent analysis
suggests that the "strong-acid" process used to manufacture isopropyl
alcohol may be responsible for these cancers [ACGIH 1991]. The
International Agency for Research on Cancer has concluded that the
evidence for the carcinogenicity of this process is adequate but that
the evidence for isopropyl alcohol itself is inadequate [IARC 1987]"

Like anything else, use caution, plenty of ventilation. IPA is
absorbed through the skin and as always breathing it goes straight
into the blood.

Steve