L-Proline

EP6

AJI92

USP40

Description

White or almost white, crystalline powder or  colourless crystals.

White crystals or crystalline powder

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Solubility

Very soluble in water,freely soluble in alcohol.

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Identification

Conforms

Conforms

Conforms

Appearance of solution

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

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Colour of solution:5% water solution should be colourless.

Assay

98.5-101.0%

99.0%~101.0%

98.5%~101.5%

pH

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5.9~6.9

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Transmittance

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≥98.0%

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Loss on drying

≤0.5%

≤0.30%

≤0.4%

Residue on ignition

≤0.1%

≤0.10%

≤0.4%

Ninhydrin-positive

Conforms

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Chloride

≤200ppm

≤0.020%

≤0.05%

Heavy Metals

≤10ppm

≤10ppm

≤15ppm

Iron

≤10ppm

≤10ppm

≤0.003%

Sulfate

≤300ppm

≤0.020%

≤0.03%

Endotoxin

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Ammonium

≤200ppm

≤1ppm

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Annonium

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≤0.02%

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Other amino acids

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Conforms

Conforms

Pyrongen

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Conforms

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Specific Rotation

-84.0° to -86.0°

-84.5°~ -86.0°°

-84.3°~ -86.3°°