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EC number: 272-554-3
CAS number: 68877-27-0
third well-performed maximisation test, conducted according to the same
guidelines and with the same experimental design, another analytical
grade zinc oxide was tested (Zincweiß Pharma A; purity 99.9%). The only
difference with the previous studies described for zinc oxide of purity
99.69% was the intradermal induction concentration, which was 2% as for
Zincweiß Pharma A this was considered the highest concentration that
could reproducibly be injected. In this test no skin reactions were
evident in both experimental and control animals, hence a 0%
sensitisation rate for Zincweiß Pharma A. White staining of the treated
skin by the test substance was observed in some animals 24 and 48 hours
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