Cbz-l-aspartic acid

Cbz-l-aspartic acid is a N‑benzyloxycarbonyl protected form of the L‑isomer of aspartic acid, supplied as a white crystalline powder. The product is listed with a CAS number 1152-61-0 and conforms to pharmaceutical‑grade manufacturing standards. Each shipment is packed in 25 kg fiber drums, and the supplier categorises the material under pharmaceutical grade.

In peptide synthesis the Cbz protecting group provides stability during coupling steps and can be removed by hydrogenolysis, making this intermediate valuable for solid‑phase and solution‑phase protocols. Typical commercial batches achieve a purity of at least 98 % as verified by HPLC, and the molecular weight is approximately 311.33 g mol‑1. The compound shows moderate solubility in polar aprotic solvents such as DMF and DMSO, and it is generally supplied as a dry powder stored under ambient conditions.

Buyers are usually research laboratories, contract manufacturing organisations and pharmaceutical developers that require a reliable source of protected amino acids for medicinal chemistry projects. The supplier states FOB and CIF terms and offers standard 25 kg drums, but exact minimum order quantities and lead times are not disclosed and should be confirmed directly. Prospective importers should verify the pharmaceutical‑grade certification, request a Certificate of Analysis and agree on Incoterms and payment conditions before finalising the purchase.

Ningbo Create Biological Project Co., Ltd is located in the Guisi Industry Zone of Ningbo, Zhejiang Province, China, at Genyu Rd., postal code 315206. The company is classified as an imported‑tier supplier and carries a harbour‑level trust tier, indicating that it has passed basic verification checks on the platform.

The supplier’s profile shows a response rate of 0.00 and no recorded average response time, meaning enquiries may not be answered promptly. The listing highlights that the chemicals are produced to pharmaceutical grade standards and are shipped in 25 kg fiber drums, but no further operational details such as production capacity or employee numbers are provided.