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

Mon Mar 10 13:53:02 EDT 2014

Some folks are also afraid of their shadow and others live in a knee 
knocking world of "what if". They also dont contribute much of use to human 
advancement.

 I seriously doubt that some casual, meaning seldom and with good 
ventilation, exposure has resulted in a competently documented case of 
injury.

----- Original Message ----- 
From: "Peter Gottlieb" <hpnpilot at gmail.com>
To: <jfor at quikus.com>
Cc: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Monday, March 10, 2014 12:44 PM
Subject: Re: [ARC5] MEK, benzene, acetone for Q dope.

> You're a medical expert now?  Look up the effects, including liver damage.
>
>
> Peter
>
>> On Mar 10, 2014, at 9:28 AM, "J. Forster" <jfor at quikus.com> wrote:
>>
>> Well, if what you say is true, where are the acres of dead plumbers? PVC
>> cement and cleaner is mostly MEK. They slosh it on rags to clean joints.
>>
>> Or the hospitals full of boat and car body builders. MEK is used to thin
>> epoxy in large quantities.
>>
>> -John
>>
>> ================
>>
>>
>>> 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
>>>>>>> ______________________________________________________________
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>>>>>
>>>>> ______________________________________________________________
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