L-Tyrosine

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1 Kilogram	FOB Price: USD 5.0000

1 Kilogram

FOB Price: USD 5.0000

3-(4-HYDROXYPHENYL)-L-ALANINE TYR L-3-[4-HYDROXYPHENYL]ALANINE

product name: h-tyr-oh

cas#: 60-18-4

synonyms: l-tyrosine

molecular formula: c9h11no3

molecular weight: 181.19

specifications: (reference standard: aji92)

item	standard	analysis data
appearance	white crystals or crystalline powder	conforms
specific rotation[α]20/d (c=5,1mol/l hcl)	-11.3 to -12.1°	-11.47°
state of solution (transmittance)	not less than 95.0%	96．5%
chloride (cl)	not more than 0.020%	0.01%
ammonium (nh4)	not more than 0.02%	0.01%
sulfate (so4)	not more than 0.020%	0.008%
iron (fe)	not more than 20ppm	8ppm
heavy metal(pb)	not more than 10ppm	6ppm
arsenic(as2o3)	not more than 1ppm	<1ppm
other amino acids	chromatographically not detectable	conforms
loss on drying	not more than 0.20%	0.15%
residue on ignition(sulfated)	not more than 0.20%	0.07%
assay	98.5 to100.5%	99.0%
ph	5.0 to 6.5	5.8