o-Cresolphthalein complexon/Me-talphthalein I/o-Cresolphthalexon/Phthalein purple
Item No.： SR0129
Store at： RT
English Name:o-Cresolphthalein complexon；Me-talphthalein I；o-Cresolphthalexon；Phthalein purple；Phthalein complexone；o-Cresolphthalein di(methylaminodiacetic acid)
Other names: n, n'-[(3-oxo-1 (3H) - isobenzofuranyl] bis [(6-hydroxy-5-methyl-3,1-phenylene) methylene] bis [n- (carboxymethyl) glycine]; Phthalein violet; Metal phthalide; Phenolphthalein violet; 2-cresol phthalein complexing agent; 3', 3' '- bis [[bis (carboxymethyl) amino] methyl] -5', 5 '' - dimethylphenolphthalein
CAS No.: 2411-89-4
C32H32N2O12=636.61
Grade: ar
Content (spectrophotometry): ≥ 80.0%
Sensitivity: acceptable
Water dissolution test: qualified
Free toluene phenolphthalein: acceptable
Organic impurities: acceptable
Burning residue (calculated by sulfate): ≤ 1.0%
Physicochemical Properties: white to brownish crystalline powder. Unstable to heat. Soluble in water, insoluble in ethanol and ether. Colorless alkali solution can be complexed with calcium, strontium and barium salts to form purple or crimson, which is pink when complexed with magnesium, and colorless when complexed with heavy metals. Melting point 181 ~ 185 ℃ (decomposition). The maximum absorption wavelength is 575 (377) nm. Products also contain aqueous sodium salt and light pink powder. Soluble in water, insoluble in ethanol
Purpose: biochemical research. Complexometric titration indicator for the determination of calcium, strontium, barium, magnesium and cadmium
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