The ion pairing generates a coloured lipophilic ion pair, which may be extracted into an organic and natural solvent which include chloroform plus a quantitative measurement on the colour extracted could be built spectrophotometrically. This type of assay is described from the BP for Clonidine Injection and Benzhexol Tablets. [Pg.317] https://cetyltrimethylammoniumchl28405.weblogco.com/32270770/how-much-you-need-to-expect-you-ll-pay-for-a-good-octyl-trimethyl-ammonium-bromide