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L-Isoleucine

Molecular Formula: C6H13NO2

Molecular Weight: 131.17

CAS No： 73-32-5

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L-IsoleucineCP2020EP11USP2023USP24FCC11
Assay≥98.5%98.5-101.0%98.5-101.5%98.5-101.5%98.5～101.5%
PH5.5-6.5/5.5-7.05.5-7.05.5-7.0
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