5-Hydroxy-l-tryptophan

5-Hydroxy-L-Tryptophan (CAS 4350-09-8) is a naturally occurring amino acid and direct biochemical precursor to serotonin, commercially known under trade names including Quietim, Tript-OH, Levothym, and Triptene, and abbreviated as L-5-HTP. It carries no assigned E-code and is classified within the amino acids and peptides category.

In personal care formulations, L-5-HTP functions as a skin and hair conditioner by supporting cellular moisture retention and acting as a humectant that draws water to the stratum corneum. Its antioxidant activity stems from the indole hydroxyl group, which scavenges free radicals and helps protect formulations and biological tissues from oxidative degradation.

This material is supplied as a solid powder compliant with REACH registration requirements and is available in pharmaceutical-grade specifications aligned with Ph.Eur. monograph standards. Procurement quantities range from laboratory-scale packaging to bulk formats. Buyers should confirm grade suitability against FCC or pharmacopoeial specifications for their target application. HS code: 29339990.