L-Phenylalanine

EP6

AJI92

USP40

Description

A white or almost white,crystalline powder,or shiny,white flakes

White crystals or crystalline powder

White crystals or crystalline powder

Solubility

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

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Appearance of solution

Clarity of solution:5% water solution should be clear

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

Identification

Conforms

Conforms

Conforms

Assay

98.5-101.0%

99.0%～100.5%

98.5%~101.5%

pH

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5.4~6.0

5.5~7.0

Transmittance

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≥98.0%

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Loss on drying

≤0.5%

≤0.20%

≤0.3%

Residue on ignition

≤0.1%

≤0.10%

≤0.4%

Ninhydrin-positive substances  (TLC)

Conforms

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Chloride

≤200ppm

≤0.020%

≤0.05%

Heavy Metals

≤10ppm

≤10ppm

≤15ppm

Lead

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Iron

≤10ppm

≤10ppm

≤30ppm

Sulfate

≤300ppm

≤0.020%

≤0.03%

Endotoxin

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Arsenic

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≤1ppm

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Ammonium

≤200ppm

≤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

-33.0°～ -35.5°

-33.5°~ -35.0°

-32.7°~-34.7°