H-Ser(Trt)-OH is used in pharmaceutical and research laboratories as a key building block in solid-phase peptide synthesis (SPPS) for the preparation of complex peptides peptide-based drugs and for structureactivity relationship (SAR) studies in medicinal chemistry.

Its purpose is to temporarily protect the serine side-chain hydroxyl group during peptide chain assembly preventing unwanted side reactions during solid-phase or solution-phase peptide synthesis.

H-Ser(Trt)-OH is a protected derivative of the amino acid serine where the side-chain hydroxyl group is protected with a trityl (Trt) group. It is typically used as an intermediate in peptide synthesis.