Lamp black is made from the soot of burning coal plus naphthalene that is then collected off of the tent material the lamps are burned in. All are human carcinogens, tertogens, and suspected mutagens. Inhalation of nickel dust may lead to lung and nasal cancer. It is not clear whether all nickel compounds cause cancer. Inhalation can cause upper respiratory irritation.
Acute ingestion causes intestinal disorders and irritation.
Chronic inhalation may cause lung cancer, perforation of the nasal septum, and respiratory allergies. Skin contact with lead chromate can cause allergies, irritation, and skin ulcers. Chronic inhalation may cause lung cancer, perforation of the nasal septum, respiratory irritation and allergies, and lead poisoning. All chrome hues, molybdate orange, cinnabar green, cinnabar green deep, geranium lake, Naples yellow - see previous entry lead chromate . All are human carcinogens, tertogens, and suspected mutagens.