Acute Absorbtion into the body leads to the formation of methaemoglobin which in sufficient concentration causes cyanosia. Onset may be delayed 2 to 4 hours or longer.
Exposure can cause stomach pains, vomiting, diarrhoea, nausea, dizziness and headache.
Harmful if absorbed through skin. May cause skin irritation. Laboratory experiments have shown mutagenic effects. Wash out mouth with water provided person is conscious. Call a doctor.