L-Isoleucine

AJI97

USP40

EP6.0

Description

White crystals or crystalline powder

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White or almost white, crystalline powder or flakes

Identification

Conform

Conform

Conform

Solubility

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Slightly Sparingly Soluble in water, Slightly soluble 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 intensely coloured than reference solution BY6

Assay

98.5%~101.0%

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%

≤0.3%

≤0.5%

Residue on ignition

≤0.10%

≤0.3%

≤0.1%

Chloride

≤0.020%

≤0.05%

≤200ppm

Heavy Metals

≤10ppm

≤15ppm

≤10ppm

Iron

≤10ppm

≤30ppm

≤10ppm

Sulfate

≤0.020%

≤0.03%

≤300ppm

Ninhydrin-positive substances (TLC)

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Conform

Arsenic

≤1ppm

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Ammonium

≤0.02%

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≤200ppm

Other amino acids

Conform

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Pyrogen

Conform

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Related compounds

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Conform

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Specific Rotation

﹢39.5°～﹢41.5°

﹢38.9°～﹢41.8°

+40.0°～ +43.0°