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Table 3 Cosmetic ingredients and cancer risk

From: Associations between environmental factors and incidence of cutaneous melanoma. Review

Cosmetic substance Risk
DEA (diethanolamine)
TEA (triethanolamine)
can result in formation of carcinogenic nitrosamines
Bronopol (2-bromo-2-nitropropane-1,3-diol) may break down into formaldehyde and also cause the formation of nitrosamines
1,2-Dioxane in surfactants/detergents contaminated with carcinogenic 1,4-dioxane
Artificial colours (as Blue 1 and Green 3) Carcinogenic
Hair dyes dark colours ingredients are carcinogenic
Cosmetic lanolin can be contaminated with carcinogenic pesticides such as DDT, dieldrin, and lindane, in addition to other neurotoxic pesticides
Talc Carcinogenic
Silica may be contaminated with carcinogenic crystalline quartz