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Allergy to computer

17.01.2001

As Swedish ecologists have discovered, the chemical compound triphenyl phosphate, which is part of the plastic of monitor cases, can cause allergies in a person working at a computer or just being in a room with a computer turned on - especially in a small room.

Triphenyl phosphate is introduced into plastics as a plasticizer and fire retardant (flame retardant). In some people, this compound causes allergies, usually in the form of itchy skin, difficulty breathing through the nose, and headaches. As studies have shown, when heated during normal operation to 50 - 55 degrees Celsius, the monitor case begins to release triphenyl phosphate vapor into the air. The content of this additive in the case plastic varies in different brands of monitors, but almost all manufacturers use it.

Appreciable concentrations of the compound were found in the air within half a meter of the screen of ten of the 18 new monitors tested. These secretions decrease sharply after eight days of continuous monitor use (the plasticizer gradually evaporates), but remain 10 times above background levels even after 183 days, which is about two years of normal computer use. Another possible source of allergy for computer workers has been found in the mouse pad. True, not in every way.

The well-known environmental organization Greenpeace is recalling 500 souvenir rugs that it sent out a few months ago to its supporters. Mats made from natural rubber harvested from the Amazon rainforest contain spores of a fungus that can cause allergies in a sensitive person. Now two universities - English and Brazilian - are working on a way to destroy harmful spores in hevea juice.

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