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AGENT Evidence for carcinogenicity Overall evaluation of carcinogenicity to humans
Human Animal
Glasswool I L 3
Glass filaments I I 3
Rockwool  I L 3
Slagwool I (no info given) L 3
Refractory ceramic fibers I S 2B
Special-purpose glass fibers I (no info given) S 2B

S = Sufficient Evidence
L = Limited Evidence
I = Inadequate Evidence
Group 2B = Possible Carcinogenic to Humans
Group 3 = Cannot be evaluated as to its Carcinogenicity to Humans

*This table is extracted from Section 5.5 of "Man-made Vitreous Fibres." International Agency for Research on Cancer (IARC) 81(2002)..