L-Aspartic Acid

AJI97

USP40

EP6.0

Description

White crystalline powder

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A white or almost white, crystalline powder or colourless crystals.

Solubility

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

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

98.5%~101.0%

98.5%~101.5%

98.5-101.5%

pH

2.5~3.5

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Transmittance

≥98.0%

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Loss on drying

≤0.20%

≤0.5%

≤0.5%

Residue on ignition

≤0.10%

≤0.1%

≤0.1%

Chloride

≤0.020%

≤0.02%

≤200ppm

Heavy Metals

≤10ppm

≤10ppm

≤10ppm

Iron

≤10ppm

≤10ppm

≤10ppm

Sulfate

≤0.020%

≤0.03%

≤300ppm

Arsenic

≤1ppm

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Ammonium

≤0.02%

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≤200ppm

Other amino acids

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Conforms

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Pyrogen

Conforms

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Specific Rotation

+24.8°~+25.8°

+24.0°~+26.0°

+24.0° to +26.0°

Ninhydrin-positive substances (TLC)

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Conforms

Related compounds

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Conforms

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