California is moving forward with significant new regulations on fragrance ingredients in cosmetic products. Assembly Bill 60, also known as the MUSK Reduction Act, has passed the state legislature and is awaiting the Governor’s signature. The bill targets several synthetic musk components, adding them to the State’s list of prohibited and restricted substances in cosmetics.

Companies with products on the market in California should take note, as the new rules will come into effect on January 1, 2027.

Here is a breakdown of the fragrance ingredients impacted by the bill:

Prohibited Ingredients

Beginning in 2027, the following ingredients will be completely banned from use in cosmetic products sold in California:

  • musk ambrette (CAS no. 83-66-9)
  • musk tibetene (CAS no.145-39-1)
  • musk moskene (CAS no. 116-66-5)
  • musk xylene (CAS no. 81-15-2)

Restricted Ingredient

The bill also places strict concentration limits on musk ketones, which will vary by product type:

  • musk ketone (CAS no. 81-14-1)
  • maximum 1.4% in fine fragrance products
  • maximum 0.56% in eau de toilette
  • 0% in oral products
  • 0.042% in all other products

Next Steps for the Industry: With a compliance deadline of January 1, 2027, manufacturers and formulators are advised to begin reviewing their product portfolios now. This will allow ample to identify any affected products and undertake necessary reformulations to ensure continued compliance in the California market.