From: Mr. X (24.39.121.42)
Subject: !!! Toxixity of formaldehyde in BKT !!!
Date: June 7, 2007 at 6:41 am PST

Formaldehyde is a toxic cheminal,which contains in BKT and
it's a illegal accoeding to FDA in the USA.

Formaldehyde is classified as a probable human carcinogen by
the U.S. Environmental Protection Agency, and as having
sufficient evidence that formaldehyde causes nasopharyngeal
cancer in humans by the International Agency for Research on
Cancer

Health effects
Formaldehyde can be toxic. At concentrations above 0.1 ppm in
air, formaldehyde can irritate the eyes and mucous membranes,
resulting in watery eyes. If inhaled, formaldehyde at this
concentration may cause headaches, a burning sensation in the
throat, and difficulty breathing, as well as triggering or
aggravating asthma symptoms.[3] The United States
Environmental Protection Agency USEPA allows no more than
0.016 ppm formaldehyde in the air in new buildings
constructed for that agency[4]

Large formaldehyde exposures, for example from drinking
formaldehyde solutions, are potentially deadly. Formaldehyde
is converted to formic acid in the body, leading to a rise in
blood acidity (acidosis), rapid, shallow breathing, blurred
vision or complete blindness, hypothermia, and, in the most
severe cases, coma or death. People who have ingested
formaldehyde require immediate medical attention.

In the body, formaldehyde can cause proteins to irreversibly
bind to DNA. Laboratory animals exposed to large doses of
inhaled formaldehyde over their lifetimes have developed more
cancers of the nose and throat than are usual, as have
workers in particle-board sawmills.

In extreme situations such as accidents, formaldehyde may be
present at high concentrations in the air, representing a
considerable immediate danger. Concentrations equal to or
greater than 20 ppm can cause serious pulmonary oedema and
eventually death. In the case of direct skin contact,
formaldehyde may produce skin lesions such as irritation,
irritant contact dermatitis and allergic contact dermatitis.
The symptoms are itching, tingling and redness. Skin
sensitization is likely to appear after contact with aqueous
solutions of formaldehyde at concentrations equal to or
greater than 2%, or even solids or resins containing free
formaldehyde. When someone is sensitized, skin allergy
(erythema) symptoms may occur at every contact with solutions
of increasingly lower concentration (starting at 0.5%
formaldehyde). These effects are easily avoidable by
protecting exposed skin for example, by wearing gloves.

Following exposure to contaminated air, the first effect is
irritation of the mucous membranes of the eye and upper
respiratory tract (nose and throat). The related symptoms are
tingling, redness or burns to the nose and throat, nasal
discharge and watery eyes. These symptoms are generally
negligible to slight for formaldehyde concentrations below 1
ppm. They can become bothersome and even intolerable at
higher concentrations mainly when they exceed 2 to 3 ppm.

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• Re: !!! Toxixity of formaldehyde in BKT !!! Alexis 9/12/07 (0)

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