Congo red / direct Congo red / boiled crimson / cotton red / direct vermilion / direct crimson

English name：Congo red；Direct red C.R.Y.；Sodium diphenyl-bis-(azo-naphthionate)；C.I.22120；Direct Red 28  

Other names: direct Congo red; Boiled scarlet; Cotton red; Direct vermilion; Direct Scarlet; Sodium diphenyl-4,4 '- Di [(azo 2) - 1-aminonaphthalene-4-sulfonate; Direct red 28; 3,3 '- [[1,1' - biphenyl] - 4,4 '- YL bis (azo)] bis (4-aminonaphthalene-1-sulfonic acid) disodium; Wind fruit red; Direct bright red 4B

CAS No.: 573-58-0

C32H22N6Na2O6S2=696.66

Grade: ind

PH discoloration range: 3.0 (blue violet) ～ 5.2 (red)

Transparency of indicator solution: acceptable

Water insoluble matter: ≤ 1.0%

Physicochemical properties (the following information is for reference only): brownish red powder. It is yellow red in water, orange in ethanol, slightly soluble in acetone and almost insoluble in ether. The maximum absorption wavelength (pH 7.3) was 488nm (E1% 1cm595). LD50 (rat, intravenous) 190mg / kg

Usage: This product is only for scientific research, not for other purposes. (the following uses are for reference only) acid base indicator. Detect hydrochloric acid and paper acidity in gastric juice. Verify boric acid and cyanide. Additives for biological media. Biological staining, such as embryo sections, plant mucin, cellulose, elastic tissue, etc

Saving: RT