★How quickly does 1 3 Dihydroxypropanone develop color on the skin? How long does it last?
1 3 Dihydroxypropanone typically starts showing a light tan within 2-4 hours, reaches full color in 8-12 hours, and lasts about 3-7 days depending on skin exfoliation rate. It does not wash off with water or soap, but naturally fades as dead skin cells shed.
★Is 1 3 Dihydroxypropanone stable in water-based formulations? What pH range is best?
DHA is stable in water-based systems within a narrow pH range of 3.5 to 5.0 (ideal 4.0-4.5). Above pH 5.5, DHA rapidly degrades, causing color loss and unpleasant odor. Below pH 3.0, it may hydrolyze. Always add DHA during the cooling phase (<40°C) to avoid heat degradation.
★What is the purity of your 1 3 Dihydroxypropanone?
The purity of our cosmetic-grade 1 3 Dihydroxypropanone is up to 99% min, with low impurity content and stable batch-to-batch consistency.
★What products is 1 3 Dihydroxypropanone mainly used in?
Mainly used in sunless tanning lotions, sprays, mousses, gels, self-tanning serums, body bronzers and salon spray tanning solutions.
★Is 1 3 Dihydroxypropanone water-soluble or oil-soluble?
DHA is water-soluble, easy to add in water-phase formulas, and has good compatibility with most water-based cosmetic ingredients.
★Do you provide samples?
Yes, samples are available for evaluation and formulation testing.
★Is 1 3 Dihydroxypropanone approved for cosmetics in the EU, USA, and China?
EU: Listed in CosIng (CAS 96-26-4) with no concentration restriction, but typical use 2-10%.
USA: FDA allows DHA as a self-tanning agent; however, it is not approved for inhalation (e.g., spray tan booths must protect eyes, lips, and avoid inhalation).
China (NMPA): Included in IECIC 2021 (approved ingredient). We can provide all required documents (COA, TDS, MSDS) for China registration.
1 3 dihydroxypropanone, also called glycerone, is a common active ingredient in sunless tanning creams or sprays. As a single carbohydrate, dihydroxyacetone is extracted from sugar beet or sugar cane, or produced through the fermentation process of glycerol.
