L-Alanine

AJI92

USP40

EP6.0

Description

White crystals or crystalline powder

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White or almost white,crystalline powder or colourless crystals

Solubility

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Freely soluble in water,very slightly soluble in alcohol.

Identification

Conforms

Conforms

Conforms

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%～101.0%

98.5%～101.5%

98.5%～101.5%

pH

5.7~6.7

5.5～7.0

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Transmittance

≥98.0%

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Loss on drying

≤0.20%

≤0.2%

≤0.5%

Residue on ignition

≤0.10%

≤0. 15%

≤0.1%

Chloride

≤0.020%

≤0.05%

≤200ppm

Heavy Metals

≤10ppm

≤15ppm

≤10ppm

Iron

≤10ppm

≤0.003%

≤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

Conforms

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Pyrogen

Conforms

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Specific Rotation

+14.3°~+15.2°

﹢13.7°～﹢15.1°

+13.5°～+15.5°