. CARNAUBA WAXCarnauba Wax is Obtained from the leaves of Copernicia cerifera Mart

theabsorbance of the resulting solution al the maximum at about ,91 nrn, Appendix 5.5. Calculate the content of C7H1ON202S akin9 557 as the value of A(1%, 1 cm) at about 291 nrn. CARNAUBA WAXCarnauba Wax is Obtained from the leaves of Copernicia cerifera Mart (Fam. Palmae) after purification to remove foreign matter Category; Pharmaceutical aid (tablet coating agent). Descnption; Pale yellow to light brown coarse powder. lakes or lumps of hard bnttle wax; odour, characteristic and free from rancidity Solubility Soluble on warming in chloroform, in ethyl acetate and in xylene, practically insoluble in water and in ethanol (95%) Storage; Store in tightly-closed, light-resist ant containers. STANDARDSl detlificalion; Carry out the method for thin-layer chromatography. Appendix 4.G, using silica gel G as the coating substance and a mixture of 98 volumes of chloroform and 2 volumes of ethyl acetate as the mobile phase. Apply separately to the plate, as bands 20 mm x 3. mm, 30 ul of solution (1) and 10 µl of solution (2). For solution (1) dissolve 0. 10 g of the substance being examined, with warming, in 5 ml of chloroform and use the warm solution For solution (2) dissolve 5 mg of (+)-menthcl 5 ul of menthyl acetate and 5 mg of thymol in 10 ml of toluene. After removal of the plate, allow it to dry in air and spray with a freshly prepared 20%w/v solution of phosphomolybdic acid in ethanol (95%) and heat at 105° for 15 minutes. The chromatogram obtained with solution (1) shows in the lower part a dark blue band due to menthol, a reddish band above it due to thymol and a dark blue band in the upper part due 10 menthyl acetate.