From: Ernest Lippert <ernielippert**At_Symbol_Here**TOAST.NET>
Subject: Re: [DCHAS-L] Vaseline and oxygen
Date: October 21, 2012 2:04:36 PM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <25a45.75e97adc.3db53fad**At_Symbol_Here**cs.com>


Monona,
Don't we need some experimental data on the reactivity of Vaseline vs O2 pressure and temperature? In the "old days" we would generate such data - perhaps even in the absence of a grant! Doesn't anybody "out there" generate basic data for the fun of it? It seems to me that such an investigation could be easily carried out as a class project in a chemical engineering department? Am I wrong?
Regards,
Ernie Lippert

On Sun, Oct 21, 2012 at 8:08 AM, <ACTSNYC**At_Symbol_Here**cs.com> wrote:
Oh come on, class. This is not like you to look at only one side of the equation and give a pass to substitute chemicals that are untested for the property in question.

- Aloe Barbadensis leaf juice;
- Water;
- Glycerin;
- Emu oil;
- Rice Bran oil;
- Dimethicone;
- DEA oleth-3-phosphate;
- Carbomer;
- Triethanolamine;
- Phenoxyethyl parsaben;
- Undecylenoyl PEG-5 paraben;
- Alantoin sodium;
- Hydroxymethyl glycinate;
- Tocopherol acetate (vitamin E);
- DL panthenol;
- Retinyl palmitate (vitamin A).

A lot the these are oils and natural hydrocarbons. Once the water and some of the lower molecular weight chemicals absorb into the skin and/or evaporate, it is the protective residue that remains on the skin that provides the benefit. And cosmetic companies want this to remain for a while or the stuff won't work.

And during the evaporation of lower molecular weight hydrocarbons from the skin, what are the risks?

Without knowing the composition and combustion characteristics of the evaporation products and the residue left on the skin you are whistling in the dark. Cripes, "emu oil?"

Let's not vet anything based on it's being derived from something other than petroleum without some data. No where is it written that Mother Nature loves us.

Monona






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