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EC number: 231-143-9
CAS number: 7440-33-7
In a skin irritation study conducted on rabbits according to OECD 404,
tungsten metal was deemed to be not irritating. In an eye irritation
study conducted on rabbits according to OECD 405, tungsten metal powder
elicited transient very slight conjunctival irritation only.
Skin and eye irritation studies of sufficient quality and tested in
accordance with standard methodology indicated that tungsten metal was
not irritating to skin. The maximum eye irritation score reported was
1.0 for conjunctiva redness in all three animals at one hour; however,
no effects were observed at 24, 48 or 72 hours. The mean score for all
eye irritation endpoints as the average of 24, 48 and 72 hours was zero.
Therefore, classification is not warranted for the skin and eye
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