Import Boc-D-Arg(Tos)-Oh Etoac — Buy in wholesale FOB from Supplier in China

BOC-D-ARG(TOS)-OH ETOAC is a protected arginine derivative used in solid-phase peptide synthesis, supplied as the ethyl acetate salt by Wuhan Yuancheng Gongchuang Technology Co., Ltd from Zhuzhou, Hunan Province, China. The CAS Registry Number is 114622-81-0, with molecular formula C11H25ClN4O5 and molecular weight 328.793 g/mol. The supplier lists assay at 99% and packages the material in 25 kg drums. This compound carries a tert-butoxycarbonyl (Boc) group on the alpha-amino position and a tosyl (Tos) protection on the guanidinium side chain, with D-arginine stereochemistry, making it suitable for synthesising D-amino acid containing peptides.

The material is an ethyl acetate (EtOAc) salt form, which typically offers improved handling characteristics and solubility in organic solvents compared to hydrochloride or free-base analogues. The Boc protecting group is acid-labile, removable with trifluoroacetic acid (TFA) or similar acidic conditions during standard peptide deprotection protocols. The tosyl group on the arginine side chain provides robust protection of the guanidinium moiety during coupling reactions, requiring harsher conditions for removal, typically HF or TFMSA in peptide synthesis workflows. Standard purity for pharmaceutical-grade peptide building blocks is typically 98-99% by HPLC, with residual solvent content controlled to ICH Q3C guidelines.

Primary buyers include contract research organisations (CROs), custom peptide synthesis houses, and pharmaceutical companies developing D-amino acid containing therapeutics, including D-peptide drug candidates and mirror-image phage display libraries. The compound also finds use in academic research exploring protease-resistant peptide analogues. Importers should confirm storage conditions, typically -20°C for long-term stability, and verify the specific polymorph or crystal form of the ethyl acetate salt, as this can affect solubility and coupling efficiency. The supplier's location in Zhuzhou, Hunan, places it within China's established fine chemical manufacturing corridor, with access to Wuhan and Changsha logistics hubs.

Wuhan Yuancheng Gongchuang Technology Co., Ltd is headquartered at No.496 Zhongshan Road, Zhuzhou, Hunan Province, China, postal code 412000. The supplier holds a harbor trust tier on the platform, with a recorded response rate of 0.00% and zero average response hours, indicating no historical quote response data is available. The address places the company in Zhuzhou, a city in central China known for its chemical and industrial manufacturing base, approximately 50 kilometres from Changsha, the provincial capital. No verified export licence, ISO certification, or GMP compliance status is stated in the available profile data.

The listing presents BOC-D-ARG(TOS)-OH ETOAC as a catalogue chemical with standard assay and packaging specifications. Buyers should note that the supplier profile does not disclose manufacturing facility details, R&D capabilities, quality control infrastructure, or domestic regulatory filings. The absence of response history means direct enquiry is essential to assess communication reliability, technical support availability, and willingness to provide batch-specific certificates of analysis. Importers are advised to request a current CoA, MSDS, and details of the synthetic route before committing to purchase.