On November 30, 2023, the South Korean Ministry of Food and Drug Safety (MFDS) issued a partial amendment to the Regulations on Cosmetics Safety Standards, etc., including the addition of some ingredients of hair dye to the list of raw materials that cannot be used in cosmetics and the addition of the chemical substance identification number (CAS No.) to improve the convenience of identifying raw materials that cannot be used in cosmetics. 

The main content of the revision is as follows. 

• Added seven hair dye ingredients such as 2-amino-4-nitrophenol to the raw materials that cannot be used in cosmetics and lowering the concentration limit when two hair dye ingredients such as hydrochloric acid 2,4-diaminophenol are used in cosmetics. 

• Added the Chemical Identification Number (CAS No.) and the chemical name of raw materials that cannot be used as cosmetics ingredients and raw materials whose use need to be restricted. 

• "Methoxypropylaminocyclohexenylidene ethoxyethylcyanoacetate," which has been reviewed as a sunscreen, is added in accordance with the Regulations on Designation of Cosmetic Raw Materials and Review of Changes (notified by the Food and Drug Administration).