Brian,
I didn't know either, so I looked it up.
Tocopheryl acetate (C31H52)3) is the acetate of vitamin E and it is indeed
an ester.
Isopropyl myristate (C17H34O2) is another ester used to kill head lice and
is used in mouth washes (quite a combo!).
Aminomethyl propanol (C4H11NO) also known as 2-amino-2-methyl-1-propanol. I
prefer the latter, the IUPAC official name. I can actually figure out what
it is without having to look it up. Anyways this one is an emulsifier and a
neutral pH buffer.
Why did I bother looking this stuff up? Because I am always interested in
what people end up putting in their Blackberries - coffee, Gatorade, coffee
with sugar, hot chocolate, coffee with cream, hot chocolate, coffee with
cream and sugar (see a trend?), Coca Cola, salt water and, get this, extra
virgin olive oil. No, I do not do biologicals. Seriously, I don't have the
protocols in place to deal with them to protect my staff.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: Monday, April 27, 2009 10:07 AM
To: [log in to unmask]
Subject: Re: [TN] Hand Sanitizer and PCB Assembly
Plus, I haven't a clue what Tocopheryl Acetate is, but it sounds as if
it might have an ionic bond somewhere in the molecule (it could also be
an ester).
Brian
Karen Tellefsen wrote:
> Purell:
>
> Ingredients:
> Active Ingredients: Contains: Ethyl Alcohol (62%)
>
> Inactive Ingredients: Water, Glycerin, Isopropyl Myristate, Propylene
> Glycol, Tocopheryl Acetate, Aminomethyl Propanol, Carbomer, Fragrance
> (parfum)
>
>
> The glycerin and propylene glycol would concern me, they're both
> hydrophillic. The ethanol in the active ingredient, maybe a mixture of
> 60% ethanol 35% water 5% isopropanol ( to make it undrinkable, but safe
> enough for topical use) would be better around circuit boards. It would
> tend to dry the users' hands, but would not help to contaminate circuit
> boards.
>
> I've always found hand sanitizer superfluous, just washing ones hands with
> soap and water kills most germs.
>
>
> Karen Tellefsen - Electrical Testing
> [log in to unmask]
> 908-791-3069
>
>
>
>
> Carl Proescholdt
> <[log in to unmask]>
> Sent by: TechNet To
> <[log in to unmask]> [log in to unmask]
> cc
>
> 04/27/2009 09:24 Subject
> AM [TN] Hand Sanitizer and PCB
> Assembly
>
> Please respond to
> TechNet E-Mail
> Forum
> <[log in to unmask]>
> ; Please respond
> to
> Carl Proescholdt
> <[log in to unmask]>
>
>
>
>
>
>
> With the recent news cycle and the concern over the flu virus, several
> people in the workforce have been asking if using a hand sanitizer such as
> Purell brand would be acceptable to use. From what I can see in the MSDS,
> the main component is alcohol, but not all ingredients are listed.
>
> I realize the best approach for actual board contact is a good hand
washing
> and gloves, but even if we put this stuff in the breakroom, and ask that
> people wash and re-glove before returning to the production area, I am
> afraid of contaminants reaching the production floor. Also, if we don't
> provide something, I suspect people will start carrying it in and using it
> themselves. Has anyone else turned up anything to suggest that it
wouldn't
> be OK to use this type product in an assembly environment? Any specific
> brand recommendations?
>
> If only we could just build boards...Happy Monday!
>
> Carl Proescholdt
> dca manufacturing corp
>
>
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