o-Cresolphthalein complexon  

CAS NO.: 2411-89-4

Byname: 3,3′ -Bis[ N, N-di-( carboxymethylaminomethyl)] –o-cresolphthalein; o-Cresol phthalein di ( methylaminodiacetic acid); Metalphthalein I;  Phthalein purple; Xylenylphthalein bis (iminodiacetic acid);

Molecular formula: C32H32N2O12

Molecular weight: 636.62

Property :  white or light pink crystalline powder. dissolved in ethanol, ether and glacial acetic acid, hard dissolved in benzene. mp 181 ~ 185C (resolution); λ max575 (377) nm.

Attention items: Not touch with skin, eye.stand off suction.

Use : complexon to test barium,calcium, magnesium, strontium etc.

Content (spectrophotometric method ): 80% Min.

Sensitivity test: passed

Solubility test in water: passed

Residue on ignition (sulfate): 1% Max.

Free cresol : passed

Organic impurity: passed