DL-Lysine

DL-Lysine (CAS 70-54-2) is the racemic form of the amino acid lysine, comprising equal parts of the D- and L-enantiomers. It is also referred to as (RS)-Lysine or (±)-Lysine and carries no assigned E-code. Unlike L-Lysine, the DL form is used primarily in non-nutritional applications where stereoselectivity is not required.

In personal care formulations, DL-Lysine functions as a hair and skin conditioner by interacting with keratin structures and supporting moisture retention through its humectant properties. It also serves as a pH buffer in cosmetic and pharmaceutical systems, where its amine groups neutralize acidic components and stabilize formulations against pH drift.

DL-Lysine is available in solid form and supplied to cosmetic, food-grade, and pharmaceutical specifications including REACH compliance for European markets. Procurement teams should confirm enantiomeric purity requirements before ordering, as this grade is distinct from Ph.Eur.-listed L-Lysine. HS code 29224110 applies for import classification.