This chemical is commonly used in peptide synthesis as a protecting group for cysteine residues. The trityl (Trt) groups shield the thiol functionality of cysteine, preventing unwanted side reactions during peptide chain assembly. The diethylamine (DEA) component aids in the solubility of the compound, making it easier to handle in organic solvents. It is particularly useful in solid-phase peptide synthesis (SPPS), where selective deprotection of the trityl groups can be achieved under mild acidic conditions, allowing for precise control over the peptide assembly process. Its application is critical in producing peptides with high purity and correct disulfide bond formation, which is essential for biological activity in therapeutic peptides and proteins.