Product Detail

L-Histidine	USP40	AJI92	EP6
Assay	98.5-101.5%	99.0-101.0%	98.5-101.0%
PH	7.0-8.5	7.0-8.5	/
Transmittance	/	Clear and colorless ≥98.0%	/
Specific rotation[a]D20	/	+12.0°-+12.8°	/
Specific rotation[a]D25	+12.6°-+14.0°	/	+11.4°-+12.4
Chloride(Cl)	≤0.05%	≤0.02%	≤0.02%
Ammonium(NH4)		≤0.02%	≤0.02%
Sulfate(SO4)	≤0.03%	≤0.02%	≤0.03%
Iron(Fe)	≤30PPM	≤10PPM	≤10PPM
Heavy metals(Pb)	≤15PPM	≤10PPM	≤10PPM
Arsenic (As2O3)	/	≤1PPM	/
Other amino acids	individual impurities≤0.5% total impurities≤2.0%	Confirms	/
Ninhydrin-positive substances	/	/	Confirm
Loss on drying	≤0.20%	≤0.20%	≤0.50%
Residue on ignition	≤0.40%	≤0.10%	≤0.10%