For B2B partners requiring detailed technical documentation. A comprehensive, batch-specific Certificate of Analysis (COA) will be provided promptly upon request.

Parameter	Specification	Test Method
Identity
Product Name	L-Tryptophan	-
CAS No.	73-22-3	-
Appearance	White to off-white crystalline powder	Visual Inspection
Key Specifications
Assay (Purity)	≥ 99%	HPLC
Specific Rotation	-30.0° to -33.0°	Polarimetry
Loss on Drying	≤ 0.5%	TGA
Residue on Ignition	≤ 0.1%	Gravimetric Analysis
Identification	Conforms to Standard	IR
Safety & Quality
Heavy Metals
- Lead (Pb)	≤ 3.0 mg/kg	ICP-MS
- Arsenic (As)	≤ 2.0 mg/kg	ICP-MS
- Cadmium (Cd)	≤ 1.0 mg/kg	ICP-MS
- Mercury (Hg)	≤ 0.1 mg/kg	ICP-MS
Total Plate Count	≤ 1000 CFU/g	USP <61>
Yeast & Mold	≤ 100 CFU/g	USP <61>
E. Coli	Negative	USP <62>
Salmonella	Negative	USP <62>
Certifications	ISO 9001, GMP (Certificates available upon request)	Audit Certification

Note: The specifications above define our standard L-Tryptophan Powder product profile. We also provide customization options—such as adjustments to purity levels and particle size distribution—to meet specific formulation requirements. Contact us to request the full Certificate of Analysis (COA) for detailed, batch-specific data and supporting compliance documentation.

Request Quote

L-Tryptophan Powder

Request Quote