Thermo Scientific Chemicals o-Cresolphthalein complexone, indicator grade

Description

Indicator for complexometric titration of Mg, Ca, Sr and Ba. It is used as an alkaline earth metal ion indicator. Suggested to be colorless at pH 11, but turns pink in the presence of alkaline earth metals. Also utilized in an auto analyzer to determine serum calcium.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Indicator for complexometric titration of Mg, Ca, Sr and Ba. It is used as an alkaline earth metal ion indicator. Suggested to be colorless at pH 11, but turns pink in the presence of alkaline earth metals. Also utilized in an auto analyzer to determine serum calcium.

Solubility
Soluble in NaOH (50 mg/ml), aqueous ammonia, and organic solvents. Insoluble in water.

Notes
Store away from strong oxidizing agents. Keep container tightly closed. Store in cool, dry conditions in well sealed containers.

Specifications

Chemical Identifiers

• CAS: 2411-89-4
• Molecular Formula: C32H32N2O12
• Molecular Weight (g/mol): 636.61
• MDL Number: MFCD00005911
• InChI Key: IYZPEGVSBUNMBE-UHFFFAOYSA-N
• Synonym: o-cresolphthalein complexone, phthalein purple, cresolphthalexon, o-cresolphthalexon, phthalein complexon, o-cresolphthalein complexon, cresolphthalein complexon, metal phthalein, cresolphthalein complexone, unii-a4p6737i7f
• PubChem CID: 75485
• IUPAC Name: 2-[[5-[1-[3-[[bis(carboxymethyl)amino]methyl]-4-hydroxy-5-methylphenyl]-3-oxo-2-benzofuran-1-yl]-2-hydroxy-3-methylphenyl]methyl-(carboxymethyl)amino]acetic acid
• SMILES: CC1=CC(=CC(CN(CC(O)=O)CC(O)=O)=C1O)C1(OC(=O)C2=CC=CC=C12)C1=CC(C)=C(O)C(CN(CC(O)=O)CC(O)=O)=C1

• Melting Point: ∽198°C (decomposition)
• Quantity: 5 g
• Beilstein: 381994
• Solubility Information: Soluble in NaOH (50mg/ml),aqueous ammonia,and organic solvents. Insoluble in water.
• Formula Weight: 636.62
• Grade: Indicator
• Chemical Name or Material: o-Cresolphthalein complexone

RUO – Research Use Only