Aluminone / Alloxan / Anthrone / Azomethine-H Monosodium Salt / 2-2-Bipyridyl / Chromotropic Acid Sodium Salt / P-Dimethyl Amino Benzaldehyde / Dimethyl Glyoxime / 2,4-Dinitro Phenyl Hydrazine / 3-5, Dinitro Salicylic Acid / N,N-Dimethyl P-Phenylene Diamine (Dihydrochloride,Oxide,Sulphate) N,N'-Diphenyl Benzidine / Diphenyl Carbazone / Dithizone / Glyoxal Bis-(2-Hydroxyanil) / 3-Methyl-2-Benzothiazolinone Hydrazone Hydrochloride (MBTH)/ 1,2-Naphthoquinone-4 Sulphonic Acid Sodium Salt / Ninhydrin / N-1-Naphthyl Ethylene Diamine Dihydrochloride / Neocuproine / 4-Nitrophenyl Phosphate Disodium Salt / Orcinol / Phenyl Phosphate Disodium Salt / Phloroglucinol / Thiobarbituric Acid / Thiosemicarbazide & Many More.