Purpose of use:

Dark red amorphous substance, moderately soluble in water and well soluble in aqueous alkali solutions. It is reagent for photometric determination of Th, U, other actinides, Hf, Zr, РЗЭ and other metals; M (IV and V) are determined in strong acidic solutions – 6.10 M HCl, V (II and III) – at pH 1-4; detection limits are up to 0.01 mg/ml.

Purpose of use:

The pink crystals; temperature of fusing 218-219 ? C, soluble in water, glacial CH3COOH, benzene, easily soluble in alcohol, ether, ethyl acetate. Acid-base indicator (changes color from yellow to blue at pH 3,8-5,4).

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Purpose of use:

Temperature of fusing 6,2 ?С, boiling point 281,1 ?С; soluble in hot water, alcohol, ether, benzene.It is a component of eluting solution in chromatography of aromatic amino and oxy compounds.

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Purpose of use:

The dark red crystals, temperature of fusing 200-202 ? C, soluble in methanol, ethanol and ether, heavily soluble in water and benzene. Acid-base indicator (color change from yellow to blue at pH 6,0-7,6), used also for titration of carboxylic acids in acrylonitrile.

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Purpose of use:

Blue crystals that are soluble in water and unstable under light influence. It is a dye for food and ink manufacturing. It is a redox indicator in titration of strong reducing agents, such as compounds of Sn (II), Ti (III), Cr (II); acid-base indicator (pH 11,6-14,0, color change from blue to yellow).

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