Coal in Tar Shampoo
Skin conditions such as atopic dermatitis are often treated with products that contain 2-5% refined grade coal tar. Coal tar is considered a carcinogen under the Proposition 65 listing of “soot, tars and mineral oils.” The State of California has developed a draft “no significant risk level” (NSRL) for coal tars based on animal studies that do not take into account available human data. Cardno ChemRisk experts developed an NSRL for coal tars based on epidemiological data. Two benchmark dose methods were used to calculate lifetime dermal doses of coal tar from shampoo use associated with a 1 in 100,000 risk. These dose estimates were extrapolated to develop an alternative NSRL for coal tar.
Artificial finger nail adhesive products contain diethylhexylphthalate (DEHP), toluene, and butylated hydroxyanisole (BHA) to which professional and consumer users of these products may be exposed. Cardno ChemRisk was asked to conduct an exposure assessment for all routes of exposure, including inhalation, ingestion and dermal exposure to understand the potential for health risks. Exposures to both consumers applying their own nails and professional nail stylists applying nails to customers were considered. The amount of exposure resulting from inhaling the fumes, incidental ingestion through hand to mouth contact, and absorbing the chemicals through the skin were made and compared to Proposition 65 standards, the California Safe Cosmetics Act, and the Food and Drug Administration (FDA) requirements, which regulate cosmetic products.