o-Cresolphthalein Complexone CAS 2411-89-4

CAS: 2411-89-4

Molecular Formula: C32H32N2O12

Molecular Weight: 636.61

EINECS: 219-318-8

Synonyms: XYLENOLPHTHALEIN-BIS(MINODIACETIC ACID); XYLENYLPHTHALEIN-BISIMINODIACETIC ACID; PHTHALEIN PURPLE; PHTHALEIN COMPLEXON; PHTHALEIN COMPLEXONE; Cresolphtha; o-Cresolphthalein complexone p.a.; o-Cresolphthalein Co; Metalphthalein, n-hydrate

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What is o-Cresolphthalein Complexone CAS 2411-89-4?

O-Cresolphthalein Complexone, also known as o-toluene phenolphthalein (C22H18O4mol346.38), is a white or yellow powder that is easily soluble in ethanol and ether; Insoluble in water, soluble in dilute alkali, blue in color, pH 8.2-9.8 (color ranges from colorless to red); The maximum absorption peak is 566 (381) mm.

Specification

Item	Specification
λmax	575nm, 377nm
Density	1.515±0.06 g/cm3(Predicted)
Melting point	181-185 °C (dec.)(lit.)
Storage conditions	Store below +30°C.
Purity	98%pKa
pKa	1.47, 8.24(at 25℃)

Application

O-Cresolphthalain Complexone is an indicator for complexometric titration of magnesium, calcium, strontium, barium, and SO42-; Reagent for determining serum calcium, chelating ion chromatography ligand for trace metal ions