L-Isoleucine

Molecular Formula: C6H13NO2

Molecular Weight: 131.17

CAS No： 73-32-5

L-Isoleucine	CP2020	EP11	USP2023	USP24	FCC11
Assay	≥98.5%	98.5-101.0%	98.5-101.5%	98.5-101.5%	98.5～101.5%
PH	5.5-6.5	/	5.5-7.0	5.5-7.0	5.5-7.0
Specific rotation[a]D20	+38.9°-+41.8°	+40.0-+43.0	/	/	+38.6～+41.5°
Specific rotation[a]D25	/	/	+38.9°-+41.8°	+38.9°-+41.8°	+38.2～+41.1°
Transmittance(T430)	≥98.0%	/	/	/	/
Appearance of solution	/	clear & colorless ≤BY6	/	/	/
Chloride(Cl)	≤0.02%	≤0.02%	≤0.05%	≤0.05%	/
Ammonium(NH4)	≤0.02%	≤0.02%	/	/	/
Sulfate(SO4)	≤0.02%	≤0.03%	≤0.03%	≤0.03%	/
Iron(Fe)	≤10PPM	≤10PPM	≤30PPM	≤30PPM	/
Heavy metals(Pb)	≤10PPM	/	/	≤15PPM	/
Arsenic	≤1PPM	/	/	/	/
Lead	/	/	/	/	≤ 5 ppm
Other amino acids	≤0.5%	/	Individual impurities≤0.5% Total impurities≤2.0%	/	/
Ninhydrin-positive substances	/	Impurities A and C at 570 nm≤ 0.3% Each impruity ≤0.2% Total ≤1.0%	/	/	/
Loss on drying	≤0.20%	≤0.5%	≤0.30%	≤0.30%	≤0.30%
Residue on ignition	≤0.10%	≤0.10%	≤0.30%	≤0.30%	≤0.20%
Insoluble foreign matter	/	/	/	/	≤50 ppm
Organic volatile impurities	/	/	/	conforms	/
Endotoxin	＜20EU/g	＜20EU/g	＜20EU/g	/	/
Total plate count	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g
Moulds & Yeasts	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g

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