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Appearance
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Yellow to green colored powder
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Solubility
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Soluble in dimethyl formamide, sparingly soluble in methanol
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Identification
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By lR
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Spectrum of sample should be concordant with the lR spectrum of ref std
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By HPLC
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The RT of sample should match with RT of WS.
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Melting range
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145.0-150.0°C
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Loss on drying
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Max 1.0% w/w
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Residue on ignition
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Max 0.1%
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Purity (by HPLC)
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Min 99.0%
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Related Substances
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4-Hydroxy-3-methoxy benzaldehyde
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Max 0.3%
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4-Hydroxy-3-methoxy-5-Nitro benzaldehyde
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Max 0.3%
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Unknown impurities
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Max 0.5%
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Assay (titration)
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98.0- 102.0%
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