Methyl alcohol USP-NF/Ph.Eur 2.5LT Go Back

CASR

: 67-56-1

Molecular Formula

: CH3OH

Molecular Weight

: 32.04
Specifications  
Appearance: Clear, colorless, volatile, hygroscopic liquid .
Solubility: Miscible with water, with alcohol, with ether, with benzene, with methylene chloride and with most other organic solvents.
Boiling point: About 64°C
Identification (By IR): IR spectra of the sample should be concomitant with reference spectrum of methanol .
Identification by chromatogram: The retention time of the major peak of the sample solution corresponds to that of the standard solution.
Identification (By Refractive index, 20±0.5°C): 1.328 to 1.330
Acidity or alkalinity: NMT 0.9 mL of 0.01 M sodium hydroxide is required to change the color of the indicator to pink.
Alkalinity (as ammonia): 3 ppm max
Relative density (20°C): 0.791 to 0.793
UV absorbance profile (10mm cell) at 230nm: 0.15 max
UV absorbance profile (10mm cell) at 250nm: 0.05 max
UV absorbance profile (10mm cell) at 270nm: 0.02 max
UV absorbance profile (10mm cell) at 290nm: 0.01 max
Readily carbonizable substances: No discoloration should develop
Readily oxidizable substances: The pink color should not be completely disappear within 5 min.
Impurity A (Benzene): 2ppm v/v max
Related substances (Any impurity): 0.1% max
Related substances (Total impurity): 0.3% max
Non-volatile Residue: NMT 0.001%w/w
Water: NMT 0.1%
Assay: NLT 99.5%
Acetone and Aldehyde (as acetone): NMT 0.003%
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