Photographers' Formulary 10g Thiourea (Thiocarbamide)

Thiourea is used In gold toning baths, Clearing yellow stains from prints & In Mordant solutions for dye toning. Note: Thiourea is neither toxic nor corrosive but, unfortunately, it is a potential carcinogen. Use rubber gloves when mixing or handling this compound or its solutions. Wash the work area, trays and all mixing utensils with water followed by soap and water. Should a solution containing thiourea be spilled on the skin, wash immediately with water followed by soap and water.