Sodium lauroyl silk amino acids (inci)

"Sodium" refers to the element sodium. The name component "lauroyl" means that the ingredient contains lauric acid (dodecanoic acid) as a fatty acid component (usually introduced via an acylation reaction).
Sarcosinates are N-acyl derivatives of sarcosine (N-methylglycine, an amino acid).

Sodium lauroyl silk amino acids is a substance which is used in cosmetic preparations where it acts as an antistatic agent (reduces static charges by neutralizing the electric charge on the surface of e.g. hair), surfactant (washing-active substance), skin care product (keeps the skin in a good condition) and as a cleansing agent for skin and hair.