Menthol Crystal

CAS number: 2216-51-5

Molecular formula: C10H20O

molecular weight: 156.2652

Chemical structure:

CERTIFICATE OF ANALYSIS
Product NameMenthol Crystal Shelf Life2 years
Items                                        StandardsAnalytical Results
USP39BP2015
IdentificationColourless, transparent hexagonal or needlelike crystals.Complies with standard
Melting point(℃)41~44℃About 43℃41.5-42.5℃
Solubility1g soluble in 5ml of 90%(v/v) alcohol,forming a clear solutionComplies with standard
Specific rotation(25℃)-45°~-51°About -50°-49.68°

Limit of Nonvolatile       

residue (%)

Not overrun 0.05 under condition of  105℃0.01
Chromatographic puritySolvent-Use dimethyl sulfoxideMeets the requirement
As ContentThe peak response due to menthol is not less than 97%≥99.6
Organic volatile impurities≤3ppm<3ppm
Heavy metals≤10ppm<10ppm
Residue on ignition≤0.1%0.03%
Related substancesExamine by gas chromatographyMeets the requirement
ConclusionAnalytical results conforming to standard BP2015/USP39