lucky123
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Registered: 5-3-2008
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Chemical resistant plastics?
I just have a question I was looking at ordering a graduated cylinder and saw pp plastic ones for a lot cheaper. I was wondering if these resistant
to all chemicals one might use them for: like perhaps acetone, nitric and sulfuric acid, or how about the methy ethyl ketone? Also just out of
curiousity I saw one site online were nitric acid was distilled using a piece of plastic resistant to hot hno3 vapors. What type of plastic would
this be? I have noticed oven bags are a very tough plastic and heat resistant too since they go into the oven. Are those bags mad of a chemically
resitant plastic?
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not_important
International Hazard
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Registered: 21-7-2006
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Web search chemical resistance plastics
http://www.buerkle.de/eng/d2-1.php
http://www.millerplastics.net/chemical_resistance_chart.html
http://www.harvel.com/tech-support-chem.asp
http://www.dynalabcorp.com/files/Use%20and%20Care%20of%20Pla...
http://www.eldonjames.com/html/chemical.html
http://www.genpore.com/pdf/chemical_resistance_chart.pdf
Many plastics are satisfactory for short term exposure, but not for storage. The polyolefins are effectively alkanes, resistant to alkalies and
non-oxidising inorganic acids, and some oxidising acids if not too hot. Solvent resistance tracks alkane soilubility fairly well, better for polar
solvents.
Fluorinated plastics are the best overall, but much more costly.
Oven bags are generally made of nylon (polyamide) or polyester, neither of which are resistant to strong alkali or acid, or to polar solvents. You
need to know the exact plastic to get further resistance information. Note that typical water and juice bottles are PETE, a polyester; simply storing
strong aqueous ammonia in one will result in fairly quick failure.
[Edited on 22-4-2008 by not_important]
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