Import Dl-Tryptophan — Buy in Bulk from Supplier in China

Dl-tryptophan is a racemic mixture of the essential amino acid tryptophan, with CAS number 153-94-6 for the D-form. It is supplied as a white crystalline powder with a molecular weight of 204.23 g/mol and is typically handled under controlled humidity to prevent degradation. The product is not enantiomerically pure, distinguishing it from L-tryptophan (CAS 73-22-3), which is used in human nutrition. This form is primarily selected for synthetic pathways in pharmaceutical intermediates and research applications where stereochemical control is managed downstream.

The material is produced through chemical synthesis rather than fermentation, resulting in a consistent impurity profile dominated by trace solvents and unreacted precursors. Typical purity levels range from 98% to 99.5% by HPLC, with moisture content below 0.5% and heavy metals under 10 ppm. These parameters align with standard industry benchmarks for non-pharmaceutical-grade amino acids used in industrial chemistry. Packaging is in sealed polyethylene-lined drums to limit exposure to moisture and light, preserving stability during transport.

Buyers include chemical manufacturers synthesizing neuroactive compounds, research laboratories studying neurotransmitter pathways, and producers of animal feed additives requiring racemic amino acid inputs. The product is shipped in 25kg or 50kg containers under standard Incoterms such as FOB Shanghai or CIF destination ports. Payment is commonly processed via T/T or L/C. Buyers should confirm assay methods, residual solvent limits, and batch-specific certificates before ordering, as specifications vary by intended use.

Shanghai Hanhong Chemical Co., Ltd. operates from Room 207, Zonghe Building, Jiachuan Rd., Shanghai 200237, China. The company is registered as an importer and distributor of fine chemicals, with no public information indicating manufacturing capability. Its profile reflects a trading entity with harbor-tier trust status and no verified response rate or average response time recorded. The listing does not state years in operation, employee count, or client references.

The supplier does not claim certifications such as ISO or SGS, nor does it list any GMP or FDA-compliant production facilities. Product sourcing appears to be through third-party manufacturers, with no disclosed supply chain details. Buyers should treat this as a distributor and verify batch traceability and origin documentation independently. No laboratory data or test reports are provided in the listing.