Bisphenol A, from baby bottles to tin cans
Jun 1 2008, 08:55 PM
Joined: 1-April 07
Member No.: 875
This chemical has recently shown up in the news lately.
Bisphenol A, mimics the female hormone estrogen, it has been found to affect fish in parts per trillion.
It leaches out of certain plastics and the unnecessary epoxy linings in tin canned food.
"The study, Toxic Baby Bottles in Canada: Bisphenol A Leaching from Popular Brands of Polycarbonate Baby Bottles, found bisphenol A leaches at significant levels from plastic baby bottles when they are heated. Lab results found leaching of bisphenol A with a range of 5-8 ng/ml (parts per billion) among the bottles tested. Recent scientific research shows that bisphenol A can be harmful at doses below the levels found in the study."
So what does the gov't do?
"Canada is the first country in the world to complete a risk assessment of bisphenol A in consultation with industry and other stakeholders, and to initiate a 60 day public comment period on whether to ban the importation, sale and advertising of polycarbonate baby bottles which contain bisphenol A."
But the amount of BPA in the plastic of baby bottles is only 5-8 parts per billion.
Yet, it has been found in canned foods at levels as high as 17.9 parts per billion!:
"Recent tests showed the presence of BPA in tomato sauce at 18.2 parts per billion and at 17.9 parts per billion in apple juice, according to a report by the Globe and Mail. The study also found trace amounts in apple juice, beer, canned soup and vegetables."
Don't they use epoxy, on the inside of beer cans?
Ever felt like you were being unwittingly marinaded?
Use glass bottles, not cans.
Nov 30 2008, 04:27 PM
Group: Global Mod
Joined: 2-October 07
From: USA, a Federal corporation
Member No.: 2,294
On phenol groups:
A microbiology professor of mine once told me that the reason that "brown bottle" Lysol "fights germs and odors" is that the phenol interfered with one's olfactory cells.
A quick search indicates:
"Through time, the Lysol and Dettol brands have changed their compositions. Lysol in particular has had its name appended to other types of disinfectants (the “quats” or quaternary compounds). Today it is difficult to find out about brown-bottle Lysol. In the USA it cannot be listed as a disinfectant because it has not been submitted to the Environmental Protection Agency for testing. The taxidermists and the museum/library conservationists have noted the changes in Lysol (substitutes of different phenolic compounds, addition of alcohols, a change in proportion of ingredients and the switch to the quaternary Lysol) which evidently affect how the material cleans or instead dissolves skin and any attached hair or feathers."
"There have indeed been forms of LysolŪ contain o-phenyl phenol. A
1996 MSDS from Reckitt & Coleman Inc. for "Lysol Phenolic
Disinfectant Cleaner gives (for liquid, gallon bottle, a clear green
liquid, a form I don't think I've ever seen):
Isopropyl Alcohol (SARA 313) : 4.04%
O-Benzyl-P-Chlorophenol : 7.24%
2-Phenylphenol (SARA 313) : 2.23%
(2-Phenylphenol is a synonym for o-phenyl phenol).
FWIW, Conservation Information Network's Materials Database (MCIN),
which is no longer being maintained but is still searchable by
subscribers, has an entry only for the spray. The record seems not
to be dated, so could be more than 10 years old (MCIN started in
1987). It gives the contents for "Sterling Drug Ltd., Lysol
Disinfectant Spray, Scent II" as
Anhydrous Ethanol 67.724%
N-Alkyl N-Ethyl Morpholinium Ethyl Sulfates 0.035%
and says that it is "N[o]t in use in conservation at present"
Phenol and lab rats:
FWIW, BPA has 2 phenol groups from the Wiki (which appear to be a benzene with an (OH)- hydroxide radical attached). What do the teenagers use again, benzoyl peroxide?
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