Composition and Toxicity Concerns
Modern sindoor mainly uses vermilion, which is an orange-red pigment. Vermilion is the purified and powdered form of cinnabar, which is the chief form in which mercury sulfide naturally occurs. As with other compounds of mercury, sindoor is toxic and must be handled carefully. Sometimes, red lead (lead tetroxide, also known as minium) is also added to sindoor. Red lead is also toxic and a known carcinogen for laboratory animals, though its carcinogenicity to humans has not been established. Traditional sindoor was made with turmeric and alum or lime, or from other herbal ingredients. Unlike red lead and vermilion, these are not poisonous. In early 2008, allegations of high lead content led the U.S. Food and Drug Administration to recall batches of Sindoor from several manufacturers.
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