Draft Consumer Chronic Inhalation Risk Calculator for HHCB

EPA has published a draft Consumer Chronic Inhalation Risk Calculator specifically for HHCB (1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyran), a synthetic musks fragrance used in personal care products, detergents, and air fresheners. The calculator is designed to assess chronic inhalation exposure risks to consumers using products containing HHCB over extended periods.

Affected parties including chemical manufacturers, consumer product formulators, and fragrance industry stakeholders should review the draft calculator parameters and submit substantive comments. Once finalized, this tool may be used in EPA risk evaluations under TSCA, potentially affecting HHCB's regulatory status and permissible use levels in consumer products.