L-Leucine

AJI92

USP40

EP6.0

Description

White crystals or crystalline powder

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White or almost white crystalline powder or  shiny flakes.

Identification

Conform

Conform

Conform

Solubility

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Sparingly soluble in water, practically insoluble in alcohol.It dissolves in dilute mineral acids and in dilute solutions of alkali hydroxides.

Appearance of solution

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Clarity of solution:5% water solution should be clear.

Colour of solution:5% water solution should be not more intensively coloured than reference solution BY6.

Assay

99.0%~100.5%

98.5%~101.5%

98.5-101.0%

pH

5.5~6.5

5.5~7.0

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Transmittance

≥98.0%

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Loss on drying

≤0.20%

≤0.2%

≤0.50%

Residue on ignition

≤0.10%

≤0.4%

≤0.10%

Chloride

≤0.020%

≤0.05%

≤200ppm

Heavy Metals

≤10ppm

≤15ppm

≤10ppm

Iron

≤10ppm

≤30ppm

≤10ppm

Sulfate

≤0.020%

≤0.03%

≤300ppm

Arsenic

≤1ppm

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Ammonium

≤0.02%

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≤200ppm

Other amino acids

Conforms

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Pyrogen

Conforms

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Ninhydrin-positive substances (TLC)

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Conforms

Specific Rotation

+14.9°~+16.0°

+14.9°~+17.3°

+14.5°~+16.5°

Related compounds

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Conforms

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