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From: AMuzi <am@yellowjersey.org>
Newsgroups: rec.bicycles.tech
Subject: Re: Caught in rain
Date: Wed, 7 May 2025 20:18:23 -0500
Organization: Yellow Jersey, Ltd.
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On 5/7/2025 8:15 PM, Jeff Liebermann wrote:
> On Wed, 7 May 2025 19:46:09 -0500, AMuzi <am@yellowjersey.org> wrote:
> 
>> On 5/7/2025 6:49 PM, Jeff Liebermann wrote:
>>> On Wed, 7 May 2025 07:24:50 -0400, Zen Cycle <funkmaster@hotmail.com>
>>> wrote:
>>>
>>>> I rinse mine for a few minutes in a coffee can with brake cleaner
>>>> (https://www.grainger.com/product/CRC-Brake-Cleaner-Solvent-35WT64)
>>>
>>> Almost pure dry cleaning solvent:
>>>
>>> <https://www.grainger.com/sds/pdf/259633.pdf>
>>>     Chemical name:  tetrachloroethylene
>>>     Common name and synonyms:  perchloroethylene
>>>     CAS number:  127-18-4
>>>     %  90 - 100%
>>>
>>> "EPA Proposes Ban on All Consumer and Many Commercial Uses of
>>> Perchloroethylene to Protect Public Health"
>>> <https://www.epa.gov/newsreleases/epa-proposes-ban-all-consumer-and-many-commercial-uses-perchloroethylene-protect>
>>>
>>> "Risk Management for Perchloroethylene (PCE)"  (Dec 2024)
>>> <https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-management-perchloroethylene-pce>
>>> "EPA has set a 10-year phaseout for the use of PCE in dry cleaning to
>>> eliminate the risk to people who work or spend considerable time at
>>> dry cleaning facilities."
>>>
>>
>> We used trichloroethane for cleaning for years, small drums
>> to fill Milwaukee Sprayers:
> 
> Please be careful with the chemical names.  The chemical Zen Cycle
> uses is tetrachloroethylene.  The chemical that you're talking about
> is trichloroethylene, which is a very different chemical.
> 
>  From 1971 to 1973, I spent some time on a PCB (printed circuit board)
> and hybrid IC (integrated circuit) soldering production line.  We
> would wash off the rosin flux with trichloroethylene (and
> trichlorethane) with no gloves and breathing protection.  In about
> 1995, we had a reunion and compared notes.  We discovered that nearly
> everyone that had worked on the production line had some form of liver
> damage.  I was the only one who didn't have liver damage, possibly
> because I spent less time near the soldering machines.
> 
>> https://sureshotsprayer.com/products/model-a-sprayer-a1102
>>
>> Which brings a good question:
>> https://ecolink.com/info/trichloroethylene-vs-trichloroethane/
>>
>> Trichloroethane is excellent for cleaning and as a bonus it
>> won't burn. Not readily at least.  Our vendor said it was
>> discontinued due to regulation years ago.
>>
>> Since government intervention, we now use brake cleaner.
>> Typically:
>>
>> https://zep.com/products/zep-brake-wash-non-chlorinated-parts-cleaner-20-gallon-50550?_pos=3&_psq=brake+wash&_ss=e&_v=1.0
>>
>> or
>> https://shop.advanceautoparts.com/p/carquest-brake-cleaner-brake-parts-cleaner-non-chlorinated-high-voc-quick-evaporation-leaves-no-residue-5-gallon-w5086/10998756-P?selectedStore=1830&searchTerm=brake+cleaner
>>
>> MSDS:
>> https://www.aapmsds.com/msds.aspx?id=19422969-8f5c-4a99-a2d3-d5ae5bc1233a
>>
>> which is more expensive and a virtual flamethrower in a
>> sprayer; shoots fire a meter and a half at 100  psi (which
>> can be seen as entertainment). In regular daily use, brake
>> cleaner is a fire hazard and attention need be paid to that.

Right you are. I'm not well versed in chemistry and linked 
the differences in the two.

-- 
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971