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

[Peter Gottlieb]

You cannot say for certain no harm will come from casual exposure. It is simply not known, and there is tremendous variation among different people. 


Peter

> On Mar 10, 2014, at 8:56 AM, "J. Forster" <jfor at quikus.com> wrote:
> 
> 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
>>>> ______________________________________________________________
>>>> ARC5 mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:ARC5 at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net Please help support this
>>>> email list: http://www.qsl.net/donate.html
>>> 
>>> --
>>> http://www.fastmail.fm - A no graphics, no pop-ups email service
>>> 
>>> ______________________________________________________________
>>> ARC5 mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:ARC5 at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net Please help support this email
>>> list: http://www.qsl.net/donate.html
>> 
>> 
>> ______________________________________________________________
>> ARC5 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:ARC5 at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> 
> 
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html