L-Leucine

Type: fine chemical; amino acid; nutritional supplement

CAS :  61-90-5

Melting point 286-288℃

Water solubility 22.4 g/L (20 C)

Standard: BP, USP, 99%

Packing: 25 Kg net/drum

Usage: L-Leucine is one of necessary amino acids, which can be nutrition food supplement, amino acid preparation, plant growth promotion, etc.

FCC4

Item Limit Result

Assay ≥98.5% 99.0%

pH 5.5～7.0 6.03

Specific rotation[a]D20 +14.9°～+16.5° +15.13°

Iron ≤50ppm <50ppm

Heavy metals ≤30ppm <30ppm

Lead(Pb) ≤10ppm <10ppm

Arsenic(As) ≤ 3ppm <3ppm

Loss on drying ≤0.10% 0.06%

Residue on ignition ≤0.10% 0.04%

AJI92

Item Limit Result

Assay 99.0～100.5% 99.9%

pH 5.5～6.5 5.6

Specific rotation[a]D20 +14.9°～+16.0° +15.6°

State of solution clear & colorless clear & colorless

(Transmittance T430) ≥98.0% 98.8%

Chloride(Cl) ≤0.020% <0.020%

Ammonium(NH4) ≤0.02% <0.02%

Sulfate(SO4) ≤0.020% <0.020%

Iron(Fe) ≤10ppm <10ppm

Heavy metals(as Pb) ≤10ppm <10ppm

Arsenic(As2O3) ≤1ppm <1ppm

Other amino acids conform conform

Loss on drying ≤0.20% 0.11%

Residue on ignition ≤0.10% 0.07%

USP24

Item Limit Result

Assay 98.5～101.5% 99.8%

pH 5.5～7.0 6.0

Specific rotation[a]D20 +14.9°～+17.3° +15.7°

Chloride ≤0.05% <0.05%

Sulfate ≤0.03% <0.03%

Iron ≤30ppm <30ppm

Heavy metals ≤15ppm <15ppm

Arsenic(AS) ≤1.5ppm <1.5ppm

Loss on drying ≤0.20% 0.12%

Residue on ignition ≤0.40% 0.01%

Organic volatile impurities conform conform