Risk Note Q
The classification as a carcinogen need not apply if it can be shown that the substance fulfils one of the following conditions:
- a short term biopersistence test by inhalation has shown that the fibres longer than 20 mm have a weighted half-life of less than 10 days, or
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a short term biopersistence test by intratracheal instillation has shown that the fibres longer than 20 mm have a weighted half-life of less than 40 days, or
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an appropriate intra-peritoneal test has shown no evidence of excess carcinogenicity, or
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absence of relevant pathogenicity or neoplastic changes in a suitable long term inhalation test.