1,3-Dihydroxyacetone, a sort of triose, is a white deliquescent crystalline powder with an awesome wonderful preference as well as a particular odor. It is the most basic ketose. No chiral facility, so no optical task. Generally exists as a dimer, as well as the dimer can be gradually dissolved in a mixture of 1 part of water and 15 parts of ethanol. Freshly prepared 1,3-Dihydroxyacetone can be quickly converted into monomer in solution, and the monomer is quickly soluble in water, ethanol, ether and also acetone. It can be removed from plants such as sugar beetroot and also sugarcane, and also can additionally be obtained by mild oxidation of glycerol (such as hydrogen peroxide as oxidant, catalyzed by ferrous salt), and the response will certainly additionally create glyceraldehyde. It is generally used as an ingredient in sun-free tanning items such as sun block.
1,3-Dihydroxyacetone, whose chemical name is 1,3-dihydroxy-2-propanone, is a common ingredient in cosmetics for skin moisturizing, self-tanning and hair coloring. Currently, DHA is not within the scope of EU Cosmetic Regulation (EC) No.1223/2009.
In 2008, the EU Scientific Committee on Consumer Safety (SCCS) received a set of application materials from enterprises to support the safety of DHA as a cosmetic ingredient. Its research data show that it is safe to use DHA with a concentration of no more than 10% as a self-tanning agent in cosmetics. In addition, it is safe to use DHA with a concentration of no more than 14% as a self-tanning agent in spray cosmetics.
In May 2019, SCCS received another application to evaluate the safety of DHA with a concentration not exceeding 6.25% when used as a hair dye in resident (non-oxidative) hair dye cosmetics.
According to the safety evaluation data provided by the company on toxicokinetics, skin irritation and sensitization, acute toxicity, reproductive toxicity, mutagenicity, and carcinogenicity, the EU Scientific Committee on Consumer Safety (SCCS) came to the following conclusions after evaluation: It is safe to use more than 6.25% DHA as a hair dye ingredient in resident (non-oxidative) hair dye cosmetics. Leave-in (non-oxidative) hair dye cosmetics with a concentration of DHA not exceeding 6.25% as hair dye ingredients are considered safe when used together with self-tanning lotions or face creams with a concentration not exceeding 10% DHA.