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This product is (1S,4R,4S)-1,7,7-trimethyl-dicyclo[2.2.1]-2-heptanol. The content of C10H18O should be NLT 95% calculated by area normalization. [Description] This product is white crystalline powder or granule. [Test] The related substances. Take an appropriate amount of this product, and add anhydrous ethanol to prepare a solution containing about 0. 5 mg/mL as the sample solution. Carry out the test by Gas Chromatography ( in Volume IV of Pharmacopoeia of the People’s Republic of China 2015); chromatographic column: capillary column with β-cyclodextrin as the stationary liquid (Cyclosil-β, 30 m × 0.25 mm × 0.25 μm); temperature program: keep the initial temperature at 50℃ for 1 min, and raise the temperature to 180℃ at a rate of 5℃/min, 27 min in total; detector: hydrogen flame ionization detector (F1D); detector temperature: 300℃; injection port temperature: 250℃; carrier gas: nitrogen; pre-column pressure: 10 psi. Accurately measure 1 μL of the sample solution, inject into the gas chromatograph, and record the chromatograms. Total impurities should be NMT 5.0 % calculated by the area normalization method, except for solvent peaks and gradient elution peaks. [Storage] Seal and store in a cool place
