Community > Posts By > NoParadoxForMe

 
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Fri 12/02/11 09:36 PM
Suprisingly, methylbenzene (toluene, isn't as bad as the simple or halogenated aromatics. I still find it counter-intuitive for alkanes to be toxic, as they don't have functional groups to be metabolized in the body.

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Wed 11/30/11 06:21 PM
Aromatics, usually those which don't contain hydrophilic groups such as sulphates or sulphonates tend to be carcinogenic. Alkanes are unreactive under normal conditions, other than through radical pathways.





google it, duh.
why do peeps ask questions on here
when their computer will find the answers?


Its called "conversation", and conversation motivated by a question like this is far, far more interesting to me than a conversation motivated by the question "Would you spank the person above you?"


NoParadox, thanks for asking your question. You got a 'friend' who inhales hexane for the slight pleasure it brings?
I agree. I had never heard of it, and this prompted me to learn something. That to me is enjoyable and all together what a science forum should be all about!

Uses

In industry, hexanes are used in the formulation of glues for shoes, leather products, and roofing. They are also used to extract cooking oils from seeds, for cleansing and degreasing all sorts of items, and in textile manufacturing.

A typical laboratory use of hexanes is to extract oil and grease contaminants from water and soil for analysis.[3] Since hexane cannot be easily deprotonated, it is used in the laboratory for reactions that involve very strong bases, such as the preparation of organolithiums, e.g. Butyllithiums are typically supplied as a hexane solution.

In many applications (especially pharmaceutical), the use of n-hexane is being phased out due to its long term toxicity, and often replaced by n-heptane, which will not form the toxic (hexane-2,5-dione) metabolite.
[edit] Production

Hexanes are chiefly obtained by the refining of crude oil. The exact composition of the fraction depends largely on the source of the oil (crude or reformed) and the constraints of the refining. The industrial product (usually around 50% by weight of the straight-chain isomer) is the fraction boiling at 65–70 °C.


I would say that based on the fact it is a hydrocarbon, and most hydrocarbons that have had long term testing have shown carcinogenic properties would be the main reason it has a warning.



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Wed 11/30/11 06:19 PM
Ah yes, Massagetrade was correct, it was more for sake of conversation. I work with the stuff on a daily basis, among many other things, and not having read many details about it, it was interesting to see people's answers. I'm not very biologically-oriented, so it's also interesting to see how an alkane could exhibit reactivity in the body.

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Sun 11/27/11 09:29 AM
Men want the same things most species of higher intelligence want, warmth, understanding, care, attention, and someone to take care of, for the most part, not including the players, cheaters, hacks, etc.

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Sun 11/27/11 09:26 AM
Why is hexane considered carcinogenic? The stock bottle has that label. What's the biological degradation pathway?