[ARC5] MEK, benzene, acetone for Q dope.

[J. Forster]

MSDSs are for Industrial Exposure...  40 hours per week for many years.
Not for occasional, casual use.

You can die from drinking water or eating carrots too.

-John

=====================



> All,
> Here is the Material Safety Data Sheet for the MEK. They always sound
> scary,
> but with the toxicity at greater than 2 gram per kilo you would have to
> drink about 3 ounces to get close to an acute  problem. The most danger is
> it is very flammable so think like gasoline; use in a well ventilated
> space
> away from ignition sources. Best outside unless it is snowing. A basement
> might pose a problem if you spilled a pint bottle.
> I am a voyeur on this site. My dad was W6FKQ and I got on your mailing
> list
> when I asked one member about some WW2 radio gear my dad had in the attic
> and in his rack in the basement. I have appreciated learning from all of
> you
> about some of the gear. There are a number of pieces in the attic, some
> new
> in the box, and one ARC-5 (sans tubes, but I probably have them in the few
> thousand tubes he tested and saved). I plan to get to divesting this gear
> and plan to start here as I know it will find a good appreciative home.
> I never got my ham license though my dad tried to interest me. I am a
> chemist and could not "see" what the electrons were doing vs what I mixed
> in
> a flask. Also, I could not make them explode.
> Regards,
> jim
>
>
> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]
> On
> Behalf Of J. Forster
> Sent: Monday, March 10, 2014 10:02 AM
> To: Leslie Smith
> Cc: ARC-5 List
> Subject: Re: [ARC5] MEK, benzene, acetone for Q dope.
>
> If you have a jar of MEK and leave it uncapped for a day, you have an
> empty
> jar.
>
> It does not 'rust' metals. I removes all oil films, and then the metal
> rusts.
>
> An occasional whiff of MEK is not hazardous, but it's stupid to stick your
> head in a tank of it's vapors. You'll probably get high, as with hundreds
> of
> other solvents.
>
> -John
>
> =================
>
>
>>   An observation, but without actual experience.
>>
>>   MEK is prone to rust ferric metals.
>>   I wouldn't breathe fumes from MEK (but I don't think any sensible
>>   person would do that).
>>   Benzene is a known carcinogen, but not liable to rust metal.
>>   Acetone should dissolve polystyrene "chips" but less hazardous than
>>   the other two.
>>
>>
>>   73 de Les Smith
>>   vk2bcu at operamail.com
>>
>>
>> On Sun, Mar 9, 2014, at 8:19, Kenneth G. Gordon wrote:
>>> On 8 Mar 2014 at 14:25, hwhall at compuserve.com wrote:
>>>
>>> > I had done some googling on plastics when thinking about coil
>>> > supports
>>> and the
>>> > polystyrene used in Q-Dope, plastic peanuts, and model airplanes
>>> > was
>>> about the
>>> > most completely RF-transparent common plastic that anyone had
>>> > reported
>>> on.
>>>
>>> The "Q" dope someone here suggested to me, 1/2 pint of MEK and as
>>> many plastic peanuts or styrofoam (same stuff, AFAIK) cups dissolved
>>> in it as it will take.
>>>
>>> Worked absolutely prefectly for me.
>>>
>>> The 1/2 pint of MEK took 16 large styrofoam cups and could have taken
>>> more, but as I said a while back, it was taking longer and longer to
>>> completely dissolve them, so I quit and used it as was.
>>>
>>> Nice stuff.
>>>
>>> Ken W7EKB
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>
>
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