4 Jan
2003
4 Jan
'03
9:21 a.m.
On Jan 4, 12:36, Philip Pemberton wrote:
Actually it's somewhat harder to ignite than petrol, and harder than
acetone. Petrol contains a number of fractions some of which are more
volatile than MEK. From memory (because I don't have any figures handy)
about 5%-10% of petrol is a fraction with BP around 20C-30C, and about 25%
with BP in the range 30C-50C. Boiling Point of acetone is 56C, MEK is 80C.
Petrol is rated as "extremely flammable", as are diethyl ether and
petroleum ether; acetone, MEK, and IPA are all "highly flammable", as are
ethanol and methanol. And if you want the TLV, it's 500ppm (that's without
the nasty additives).
Acetic acid: TLV 10ppm
TLV (threshold limit value) is a time-weighted average concentration to
which a worker can be exposed day after day without adverse effect.
pete(a)dunnington.u-net.com wrote:
> MEK is indeed methyl ethyl ketone, aka butanone.
[...]
Just out of interest, how does it compare with
acetone?
Acetone: TLV 1000ppm
Butanone: TLV 200ppm
IPA: TLV 300ppm
BUT please note these figures vary from authority to authority because of
differing regulations in different countries, and are sometimes revised in
the light of research or experience. The figures I've given are from the
Chemical Society in the UK, and US values may differ. Also, TLV says
nothing about what the effects of excessive exposure might be, nor about
other hazards (fire, caustic effects, etc).
Like IPA,
acetone (nail
varnish remover), methylated sprit, etc, it's fairly flammable.
Er, fairly
flammable? From the reports I've read, it's worse than petrol
(unleaded, LRP, take your pick). BTW, the
acetic acid given off
by curing RTV is rated as 10-50 times more toxic than MEK :-)
Hmm... I've just found a page that lists some solvents
and their uses -
http://www.seahawkpaints.com/solvents.html
It lists Xylene as being usable for epoxy and polyurethane resin removal.
Hmm... Shame the only source of xylene I have is the stuff mixed with
varnish in my Electrolube "CPL" lacquer pen.
You can get it from some trade paint suppliers as it's used as a thinner
for some epoxy paints. And of course from any industrial or laboratory
chemical supplier, of which there are several in Yorkshire.
--
Pete Peter Turnbull
Network Manager
University of York
5 Jan
5 Jan
12:38 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
Quothe pete(a)dunnington.u-net.com, from writings of Sat, Jan 04, 2003 at 11:23:13PM +0000:
On Jan 4, 12:36, Philip Pemberton wrote:
Acetone: TLV 1000ppm
Speaking of Acetone, I noticed that an old metal container of it that
I have keeps swelling up and creasing the metal a bit after it's
reclosed, and vapors hiss out of it when it's opened. The container
is slightly rusty, and probably only about six or seven years old. Is
this anything to be concerned about?
--
Copyright (C) 2002 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.
12:43 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
Use a plastic or a glass bottle. If there is a sparc next time you open it
it may fry your eyebrows and/or hair!.
Ed
Quothe pete(a)dunnington.u-net.com, from writings of
Sat, Jan 04, 2003 at
11:23:13PM +0000:
On Jan 4, 12:36, Philip Pemberton wrote:
Acetone: TLV 1000ppm
Speaking of Acetone, I noticed that an old metal container of it that
I have keeps swelling up and creasing the metal a bit after it's
reclosed, and vapors hiss out of it when it's opened. The container
is slightly rusty, and probably only about six or seven years old. Is
this anything to be concerned about?
--
Copyright (C) 2002 R. D. Davis The difference between humans & other
animals:
All Rights Reserved an unnatural belief that we're above Nature
&
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify
such
http://www.rddavis.org beliefs and to justify much human cruelty.
2:19 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
----- Original Message -----
From: <quapla(a)xs4all.nl>
To: <cctalk(a)classiccmp.org>
Sent: Sunday, January 05, 2003 9:45 AM
Subject: Re: Acetone container swelling; safe to keep? (was: Looking 4...)
Use a plastic or a glass bottle. If there is a sparc next time you open it
it may fry your eyebrows and/or hair!.
Er, an on-topic Sparc wouldn't run that hot, would it? I'd be more
concerned if it was beside an Alpha-- my DEC 3000-800 will heat our basement
noticably!
Ed
Bob
> Quothe pete(a)dunnington.u-net.com, from writings of Sat, Jan 04, 2003 at
> 11:23:13PM +0000:
>
>> On Jan 4, 12:36, Philip Pemberton wrote:
>> Acetone: TLV 1000ppm
>
> Speaking of Acetone, I noticed that an old metal container of it that
> I have keeps swelling up and creasing the metal a bit after it's
> reclosed, and vapors hiss out of it when it's opened. The container
> is slightly rusty, and probably only about six or seven years old. Is
> this anything to be concerned about?
>
> --
> Copyright (C) 2002 R. D. Davis The difference between humans & other
> animals:
> All Rights Reserved an unnatural belief that we're above
Nature
> &
> rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to
justify
> such
> http://www.rddavis.org beliefs and to justify much human
cruelty.
>
5:18 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
Er, an on-topic Sparc wouldn't run that hot, would
it? I'd be more
Well, an Ultra-Sparc III at 1050MHz may consume about 200 Watts
or more....
A reasonable amount of heat I think :=)
Usually I let my 11/70 run for about an hour, then my hobby room is
warm enough to work in.
concerned if it was beside an Alpha-- my DEC 3000-800
will heat our
basement noticably!
Ed
6 Jan
6 Jan
2:55 a.m.
New subject: Power consumption (was: Re: Acetone container swelling; safe to keep? (was: Looking 4...))
On 2003.01.05 20:21 quapla(a)xs4all.nl wrote:
Well, an Ultra-Sparc III at 1050MHz may consume about
200 Watts or
more....
The CPU only or the complete system?
Usually I let my 11/70 run for about an hour, then my
hobby room is
warm enough to work in.
Once again time to point to the "Top 10 Signs why You
are a VAX Geek."
http://world.std.com/~bdc/projects/vaxen/vaxgeektop10.html
Cite:
7. Your electricity bill is more than your monthly rent payment.
5. You don't have an SO, but it's okay because your computer keeps
you warm at night.
2. Your house is pleasantly warm in the dead of winter, even with the
air
conditioning turned all the way up.
> concerned if it was beside an Alpha-- my DEC
3000-800 will heat our
> basement noticably!
I measured the power consumption of my Alpha DEC 3000-600:
230 W. Even
my newish 500 MHz Alpha and the Indigo2 (on topic since 1.1. ;-) ) are
only at about 140..150 W.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
4:50 a.m.
New subject: Power consumption (was: Re: Acetone container swelling; safe to keep? (was: Looking 4...))
I measured the power consumption of my Alpha DEC
3000-600: 230 W. Even
my newish 500 MHz Alpha and the Indigo2 (on topic since 1.1. ;-) ) are
only at about 140..150 W.
I've noticed that my Alphastation 500/500 generates more heat
than my Alphaserver 4100, and the 4100 has two power supplies
and four 466MHz CPUs.
I couldn't believe it at first (I added the AS500 and the room
got a lot warmer) so I shut them both down, let the room cool
off, then brought the AS500 up. The room quickly got warm. I
then shut the AS500 down, let the room cool off, then brought
up the 4100. The room stayed cool.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
5 Jan
5 Jan
6:54 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
Robert,
Speaking of Acetone, I noticed that an old metal
container of it that
I have keeps swelling up and creasing the metal a bit
The container
is ... probably only about six or seven years old. Is
this anything to be concerned about?
If you have a natural gas heater, hot water heater, or stove, with
a pilot light, you might have the makings for an explosion and fire
if that can of acetone can springs a leak and the vapors are ignited
by a pilot light. You might even be able to get an ignition spark off a
heater's wall thermostat.
I had a gasoline can made in the style of a military jerry can that
expanded and contracted too many times such that the metal fatigued
and it did spring a leak and the gasoline leaked out in the back of an
enclosed pickup truck camper shell, soaking the carpeting inside. Had
there been a source of ignition at the time, that truck would have burned
to the ground.
A new quart of acetone is only about $5 to $8 if I remember correctly.
Doesn't even compare to what it would cost you if your house burns down.
At 10:08 AM 1/5/03 -0500, you wrote:
Quothe pete(a)dunnington.u-net.com, from writings of Sat,
Jan 04, 2003 at
11:23:13PM +0000:
On Jan 4, 12:36, Philip Pemberton wrote:
Acetone: TLV 1000ppm
Speaking of Acetone, I noticed that an old metal container of it that
I have keeps swelling up and creasing the metal a bit after it's
reclosed, and vapors hiss out of it when it's opened. The container
is slightly rusty, and probably only about six or seven years old. Is
this anything to be concerned about?
--
Copyright (C) 2002 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify
such
http://www.rddavis.org beliefs and to justify much human cruelty. 
7:16 a.m.
New subject: Acetone container swelling; safe to keep? (was: Looking 4...)
R. D. Davis wrote:
Speaking of Acetone, I noticed that an old metal
container of it that
I have keeps swelling up and creasing the metal a bit after it's
reclosed, and vapors hiss out of it when it's opened. The container
is slightly rusty, and probably only about six or seven years old. Is
this anything to be concerned about?
If it's just a bit of surface rust, I wouldn't worry about it.
The container swells a little when some of the acetone evaporates.
Store it somehere out of harms way. The garage on a shelf is usually
safe, unless maybe your a welder, or it's heated. I kept my laquer
thinner in my linen closet in my apartment :-) I had most of my other
cleaning products in there too..... more so than linens :-) It was
right next to the furnace closet, but all caps were on tight, and I used
various cleaning products often enough, so that I easily kept track of
what was there, and that it was still in good condition.
Chad Fernandez
Michigan, USA
8022
days inactive
8024
days old
8 comments
8 participants
participants (8)
-
dittman＠dittman.net -
fernande＠internet1.net -
jkunz＠unixag-kl.fh-kl.de -
mail.list＠analog-and-digital-solutions.com -
pete＠dunnington.u-net.com -
quapla＠xs4all.nl -
rdd＠rddavis.org -
rschaefe＠gcfn.org