Xylenol/3,3′-Bis[N,N-di(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein

English Name: xylenol orange; 3,3′-Bis[N,N-di(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein； o-Cresolsulfonphth-alein-3,3′-bismethyliminodiacetic acid 

Other names: xylenol orange; 3,3 '- bis [n, N-bis (carboxymethyl) aminomethyl] o-cresol sulfonyl phthalide; O-cresol sulfonylphthalein-3,3 '- dimethyliminodiacetic acid; Xylenol orange trisodium salt; Xylenol orange sodium salt; Xylenol orange sodium salt; Xylenol orange sodium salt

CAS No.: 63721-83-5

C31H29N2Na3O13S=738.61

Grade: ar

Effective spectroscopic content: ≥ 75.0%

Zinc sensitivity test: acceptable

Free o-cresol sulfonphthalein: acceptable

Burning residue: 25.0 ~ 30.0%

 Physicochemical Properties: reddish brown crystalline powder, easy to absorb moisture. Soluble in water, insoluble in absolute ethanol. The aqueous solution is red, the acidic solution is lemon yellow, the metal complex is bright red, and the alkaline solution is red purple. Melting point 210 ℃ (decomposition). Maximum absorption wavelength 580nm

Purpose: biochemical research. Complexation indicator, titrate zinc, bismuth, cadmium, cobalt, copper, iron, mercury, indium, lanthanides, nickel, lead, scandium, thorium, zirconium, thallium, uranium (VI), vanadium, etc. Photometric determination of zinc, aluminum, beryllium, bismuth, lanthanum, niobium, nickel, palladium, thorium, yttrium, zirconium, etc. Acid base indicator

Save: RT, away from light