Stable. Substances to be avoided include strong acids and strong bases, tartaric acid, oxalic acid. Blackened by contact with ozone, hydrogen sulfide, sulfur. Powder is highly flammable.
暴露限值
TLV-TWA (metal dusts and fumes) 0.1
mg/m3 (ACGIH), 0.01 mg/m3 (MSHA and
OSHA), soluble compounds 0.01 mg/m3
(AIGIH).