DL-1,2-O-Cyclohexylideneglycerol was prepared by reacting cyclohexanone and glycerol in the presence of sulphuric acid. It is miscible with all common organic solvents and is slightly soluble in water. It is not affected by hydrogenolysis at 25 °C. over palladous oxide at 50 p.s.i. for 24 hr. The DL-1,2-O-cyclohexylidene-3-O-p-nitrobenzoylglycerol is readily cleaved by mineral acids to yield 3-O-p-nitrobenzoylglycerol. Proof of the 1,2 ketal structure was obtained by (a) preparation of the monomethyl derivative, acid hydrolysis, and periodic acid oxidation of the resultant 1-monomethyl ether of glycerol and (b) treatment of the tosyl derivative with sodium iodide which gave a 93% yield of sodium p-toluenesulphonate.