L-Tyrosine

CAS No.: 60-18-4
Molecular formular: C₉H₁₁NO₃
Molecular weight: 181.19

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Shijiazhuang Jirong Pharmaceutical Co., Ltd.

Address: No.8 North of Huagong Road, Circular Chemical Industry Zone, Shijiazhuang, Hebei, China

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L-Tyrosine	AJI97	USP2025	EP11	JP18
Appearance	White crystals or crystalline powder	White crystals or crystalline powder	White or almost white, crystalline powder or colourless crystals	White crystals or a crystalline powder
ldentification	Conform	Conform	IR:Conform to CRS Spectrum	IR: Conform to CRS Spectrum
ldentification(UV)	/	/	/	Conform
State of solution (Transmittance)	Clear and colorless, ≥98.0%	/	/	/
Specific rotation	-11.3° ~ -12.1°	/	-12.3° ~ -11.0° (dried substance)	-10.5° ~ -12.5°
Optical rotation	/	-9.8º ~ -11.2º	/	/
Chloride	≤0.020%	≤0.04%	≤200ppm	≤0.021%
Sulfate	≤0.020%	≤0.04%	≤300ppm	≤0.028%
Ammonium	≤0.02%	/	≤0.02%	≤0.02%
Iron	≤10ppm	≤30ppm	≤10ppm	≤10ppm
Heavy metals	≤10ppm	/	/	≤10ppm
Arsenic	≤1ppm	/	/	/
Other amino acids	Conform	/	/	/
Loss on drying	≤0.20%	≤0.3%	≤0.5%	≤0.3%
Residue on ignition	≤0.10%	≤0.4%	≤0.1%	≤0.1%
pH	5.0 ~ 6.5	/	/	/
Assay	99.0% ~ 101.0%	98.5% ~ 101.5% (on the dried basis)	99.0% ~ 101.0% (dried substance)	99.0% ~ 101.0%
Related compounds	/	Any individual impurity: ≤0.5%	/	Conform
Related compounds	/	Total impurities: ≤2.0%	/	Conform
Appearance of solution	/	/	The solution is clear and not more intensely coloured than reference solution Y₇	Clear and colorless
Ninhydrin-positive substances	/	/	Impurity A: ≤ 0.5%	/
			Any ninhydrin-positive substance: each impurity: ≤ 0.2%
			Total: ≤ 0.6%