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

Mon Mar 10 13:29:49 EDT 2014

The EPA recently classifies CO2 as a "pollutant" and is currently trying
to regulate it, based on that opinion. It is before the courts.

CO2 is a product of mammalian (and probably other) metabolism. So, the EPA
is attempting to regulate a waste product of normal metabolism. That is
IDIOTIC.

Pee and poo are also metabolic waste products. How soon will those be
regulated too?

And so is methane from cows. There have been attempts to regulate that as
a 'greenhouse' gas.

The point is that much governmental regulation is nonsense.

The world is full of 'Chicken Littles', often purposely distorting to
serve their political agendas. "Global Warming" or "Climate Change" or
whatever it is called this week is a prime example.

Back to the OP, IMO the risks from occasional exposure to small quantities
of MEK is a non-issue.

YMOV,

-John

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

> Huh?  CO2?  Sorry, you lost me.
>
> Personally I don't worry about a little exposure, but I encourage others
> to do their own risk assessment and not try to give advice on things I
> don't really know about, especially regarding health.
>
>
> Peter
>
>> On Mar 10, 2014, at 9:57 AM, "J. Forster" <jfor at quikus.com> wrote:
>>
>> If regarding CO2 as a 'pollutant', hence regulating it, is the best
>> 'medical opinion' by that measure I am.
>>
>> And, if you worry about occasional MEK exposure, you should never eat
>> tomatos, or probably anything else,...  they have scores of naturally
>> ocurring carcinogens.
>>
>> -John
>>
>> =============
>>
>>
>>
>>
>>
>>
>>
>>
>>> 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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>>>>>>>
>>>>>>> ______________________________________________________________
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>>>>>>
>>>>>>
>>>>>> ______________________________________________________________
>>>>>> ARC5 mailing list
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>>>>>>
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>
>