Reagent thymol-sulfuric acid

Derivatization reagent Thymol-sulfuric add Diphenylamine-aniline-phosphoric acid... 

Figure 63. Identification of sugars after derivatization with the thymol-sulfuric acid reagent...

Another non-specific color reagent for RDX and HMX is a solution of thymol in concentrated sulfuric acid [3, 56, 59]. It produces a typical red color. Positive results are also obtained with non-explosive compounds such as sugars and aldehydes. 

Universal bH indicator oaDer, Add a droD of Nesslet s reagent (to 5g of Kl in a min of cold water add a satd aq Hjgl solo until a ppt forms add 40 ml of 50 aq KOH, let settle, dilute to 100 ml with water, let settle and decant) and note color of ppt. Place 50 mg of sample in each of three depressions on a spot-test plate. To one add 2—3 drops of a 65—68% aq ethylene diamine soln, stir and note color of soln to another add 3—4 drops of a solution of Ig diphenylamine in 100ml of ooned sulfuric acid, stir, and note color of soln after 1 min to the last sample add 50mg of thymol and 3 drops of coned sulfuric acid, stir and note color after 5 min... 

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