Item

Specification

Result                  

Appearance

Colorless transparent hexagonal

Or needlelike crystals

Complies

Melting point

41-44

43.5

Specific rotation        

 (25)

-45°-51°

0-49.568°

Limit of nonvolatile residue (%)

Not overrun 0.05 under condition of 105

0.01

Purity (%)

≥97.0

99.902

Chromatographic purity

The peak respnse due to menthol is not less than 97%

Pass test

Related substances

Examine by gas chromatography

Pass test

Conclusion

Analytical result conforming to standard USD28/BP 2004