o-Cresolphthalexon An alkaline earth metal indicator

o-Cresolphthalexon (CAS 2411-89-4)

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Synonym: Phthalein purple
Application: An alkaline earth metal indicator
CAS Number: 2411-89-4
Molecular Weight: 636.60
Molecular Formula: C32H32N2O12
* Refer to Certificate of Analysis for lot specific data (including water content).
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o-Cresolphthalexon, also known as Phthalein purple, is a coloring agent 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 autoanalyzer to determine serum calcium.

Appearance :
Powder
Physical State :
Solid
Solubility :
Soluble in water, NaOH (50 mg/ml), aqueous ammonia, and organic solvents.
Storage :
Store at room temperature
Melting Point :
181-185° C (lit.)(dec.)
Boiling Point :
~892.1° C at 760 mmHg (Predicted)
Density :
~1.5 g/cm3 (Predicted)
Refractive Index :
n20D 1.68 (Predicted)
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
WGK Germany :
3
PubChem CID :
75485
Merck Index :
14: 10274
MDL Number :
MFCD00005911
EC Number :
219-318-8
Beilstein Registry :
381994
SMILES :
CC1=C(C(=CC(=C1)C2(C3=CC=CC=C3C(=O)O2)C4=CC(=C(C(=C4)CN(CC(=O)O)CC(=O)O)O)C)CN(CC(=O)O)CC(=O)O)O

Download SDS (MSDS)

Certificate of Analysis

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