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L-Asparagine Monohydrate Item USP40 AJI92 EP6 Appearance White crystals or a crystalline powder White crystals or crystalline powder White or almost white,crystalline powder or colourless crystals Identification Conform Conform IR:Conform to CRS Spectrum Specific rotation[α]D20 +33.0°~ 36.5° +34.2°~ +36.5° +33.7° ~ +36.0° State of solution / Clear and colorless,≥98.0% / Appearance of solution / / Solution S is clear and colourless Chloride / ≤0.020% ≤200ppm Ammonium / ≤0.10% ≤0.1% Sulfate / ≤0.020% ≤200ppm Iron / ≤10ppm ≤10ppm Heavy metals / ≤10ppm ≤10ppm Arsenic / ≤1ppm / Other amino acids / Conform / Chromatographic purity Each individual impurity:≤0.5% Total impurities:≤1.0% / / Ninhydrin-positive substances / / Any impurity:≤0.5% Loss on drying 11.5% ~ 12.5% 11.5%~12.5% 10.5% ~ 12.5% Residue on ignition ≤0.1% ≤0.10% ≤0.1% Lead ≤5ppm / / Assay 98.0% ~ 101.5% 99.0% ~ 101.0% 99.0% ~ 101.0% pH / 4.4 ~ 6.4 4.0 ~ 6.0 TAMC ≤1000cfu/g / / TYMC ≤100cfu/g / /
Asparagine monohydrate
CAS NO.：2058-58-4
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