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EC number: 295-511-0 | CAS number: 92061-97-7 A complex combination of hydrocarbons produced as the residual fraction from the distillation of the products from a catalytic cracking process. It consists predominantly of hydrocarbons having carbon numbers predominantly greater than C11 and boiling above approximately 200°C (392°F).
Results presented as the photoirritation index = (24 + 72 mean for erythema and oedema after treatment with test substance and UV irradiation) - (24 + 72 mean for erythema and oedema after UV irradiation without treatment with test substance).
Mean photoirritation index = 2.8
Time course for findings:
In a photoirritation study, 0.3 mL of the test material (F-136, heavy thermocracked distillate; CAS# 64741-81-7) was dermally administered (undiluted) to the clipped dorsal skin of 5 New Zealand White rabbits and covered under occlusive dressing for a period of 1 hour. The animals were subsequently observed for a period of 3 days.
The mean photoirritation index was determined to be 2.8.
It was concluded that the heavy thermocracked distillate has a moderate potential to evoke photoirritation.
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