Description 2-Butyn-1-ol, 98.3%, by Sigma-Aldrich, Certified, 25g For Research & Development Not for drug, clinical use in humans, for food or food additive use Certificate of Analysis: TEST SPECIFICATION LOT 01501CF RESULTS APPEARANCE COLORLESS TO YELLOW LIQUID COLORLESS LIQUID REFRACTIVE INDEX AT 1.4531 20 DEG C INFRARED SPECTRUM CONFORMS TO STRUCTURE AND STANDARD AS ILLUSTRATED ON PAGE 935B OF EDITION I, VOLUME 2 OF "THE ALDRICH LIBRARY OF FT-IR SPECTRA". GAS LIQUID 97.5% (MINIMUM) 98.3 % CHROMATOGRAPHY CAS: 764-01-2 FORMULA: CH3C≡CCH2OH