Product Brief Introduction
Product name: Methyldopa
CAS: 555-30-6
MF: C10H13NO4
MW: 211.21
Product Specification
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Appearance |
White or yellowish-white crystalline powder, or colorless crystals |
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Identification |
IR: the infrared absorption spectrum of the sample complies with the reference standard |
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Enantiomeric purity: D-methyldopa ≤ 0.5% |
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|
Appearance of Solution |
The solution is clear and not more intensely coloured than reference solution BY6 or B6 |
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Absorbance (1%, 1cm) |
122.0-137.0 |
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Solubility |
Slightly soluble in water, very slightly soluble in ethanol(96%), freely soluble in dilute mineral acids |
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Moisture |
10.0%~13.0% |
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Sulfated Ash |
≤ 1.0% |
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Acidity (0.1M NaOH) |
≤ 0.5ml/g |
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Related Substances |
Impurity A ≤ 0.15% |
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Impurity B ≤ 0.15% |
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Impurity C ≤ 0.15% |
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Unspecified Impurities ≤ 0.05% |
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Total impurities ≤ 0.5% |
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Residual Solvents
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Methanol ≤ 3000ppm |
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Dichloromethane ≤ 600ppm |
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Benzene ≤ 2ppm |
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Toluene ≤ 890ppm |
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Assay |
99.0%~101.0% |
