a) Acid base indicators

• Bromphenol  red (yellow-violet-red)
• 3’,3”- Dibromphenolsulfophtalein, C19H21Br2O5S,
• Bromphenol red, water-soluble (yellow-violet-red)
• 3’,3” Dibromphenolsulfophtalein ammonium salt
• Bromphenol blue, pfa (yellow – blue) M.w.669,96
• 3’, 3”, 5’, 5”- Tetrabromphenolsulfophthalein, C19H10Br4O5S
• Bromphenol blue, water-soluble (yellow – blue)
• 3’, 3”, 5’, 5”- Tetrabromphenolsulfophthalein ammonium salt 
• Cresol red, pfa (yellow –пурпурно-red)
• о- Cresolsulfophthalein C21H18O5S,  M.w. 382,44
• Cresol red, water-soluble, pfa о- Cresolsulfophthalein ammonium salt C21H21NO5S,  M.w. 399,43
• Methyl orange, pfa (red-yellow)
• Lacmoid, pfa  (red-yellow) Resocrin  blue
• Thymol  blue, pfa (red – yellow, yellow- blue),
• Thymolsulfophthalein C27H30O5S×1/2Н2О,  M.w. 475,60
• Thymol  blue, water-soluble, pfa (red – yellow, yellow- blue)
• Thymolsulfophtalein ammonium salt
• Tropaeolin O, pfa  (yellow – orange) (Acid orang 6)
• 2’,4’- Dioxyasobensol-4-sulfoacid sodium salt
• Phenol red, pfa  (Yellow-red)
• Phenol red, water-soluble, pfa (Yellow-orange-intensively pink) Sodium salt

b) Analytical reagents

• 1,5- Diphenilcarbaside, pfa (adsorption indicator)
• M.w. 242,28; C13H14ОN4
• p-(Dimethylamino) benzaldehyde
• Dimethylsulphone
• Pyrogallol A (1,2,4-Triacetoxybenzene)
• Fisher's reagents;
• 2,3,5-Triphenyltetrazoliumchloride