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o-Cresolphthalein Complexone

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o-Cresolphthalein Complexone Basic information

Product Name:
o-Cresolphthalein Complexone
Synonyms:
  • enylene)methylene]]bis[n-(carboxymethyl)-
  • Glycine,N,N'-[(3-oxo-1(3H)-isobenzofuranylidene)bis[(6-hydroxy-5-methyl-3,1-
  • Phthalocyanine indicator solution
  • METALPHTHALEIN, REAGENT (ACS)METALPHTHALEIN, REAGENT (ACS)METALPHTHALEIN, REAGENT (ACS)
  • 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
  • glycine,n,n’-[(3-oxo-1(3h)-isobenzofuranylidene)bis[(6-hydroxy-5-methyl-3,1-ph
  • N,N’-[(3-oxo-1(3H)-isobenzofuranylidene]bis[(6-hydroxy-5-methyl-3,1-phenylene)methylene)]bis(n-(cGlycine
  • XYLENOLPHTHALEIN-BIS(MINODIACETIC ACID)
CAS:
2411-89-4
MF:
C32H32N2O12
MW:
636.61
EINECS:
219-318-8
Product Categories:
  • Phthalein
  • Analytical Chemistry
  • Chelating Reagents
  • Complexones
  • Photometric Reagents (Complexone)
Mol File:
2411-89-4.mol
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o-Cresolphthalein Complexone Chemical Properties

Melting point:
181-185 °C (dec.)(lit.)
Boiling point:
892.1±65.0 °C(Predicted)
Density 
1.515±0.06 g/cm3(Predicted)
storage temp. 
Store below +30°C.
solubility 
NaOH: soluble50mg/mL
form 
Powder
pka
1.47, 8.24(at 25℃)
color 
white to off-white
PH Range
Colorless (8.2) to red (9.8)
Water Solubility 
SLIGHTLY SOLUBLE
λmax
575nm, 377nm
BRN 
381994
Stability:
Stable. Incompatible with strong oxidizing agents.
Major Application
Sensors, photoconductors, copying materials, rubber, body fiuid testing, determination of calcium, magnesium, tin, method for measuring urea nitrogen, liposomal construct for diagnostic use, cardiovascular disease, antibacterial agent
InChIKey
IYZPEGVSBUNMBE-UHFFFAOYSA-N
EPA Substance Registry System
Glycine, N,N'-[(3-oxo-1(3H)-isobenzofuranylidene)bis[(6-hydroxy-5-methyl-3,1-phenylene)methylene]]bis[N-(carboxymethyl)- (2411-89-4)
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Safety Information

Hazard Codes 
Xn
Risk Statements 
20/21/22-36/37/38
Safety Statements 
22-24/25-36-26
WGK Germany 
3
TSCA 
Yes
HS Code 
29322980

MSDS

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o-Cresolphthalein Complexone Usage And Synthesis

Chemical Properties

White powder

Uses

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.

Purification Methods

o-Cresolphthalein (a complexon precursor without the two bis-carboxymethylamino groups) is a contaminant and is one of the starting materials. It can be removed by dissolving the reagent in H2O and adding a 3-fold excess of sodium acetate and fractionally precipitating it by dropwise addition of HCl to the clear filtrate. Wash the precipitate with cold H2O and dry the monohydrate at 30o in a vacuum. The pure material gives a single spot on paper chromatography (eluting solvent EtOH/water/phenol, 6:3:1, and developing with NaOH). [Anderegg et al. Helv Chim Acta 37 113 1954.] It complexes with Ba, Ca, Cd, Mg and Sr. [Beilstein 18 III/IV 8141.]

o-Cresolphthalein Complexone Preparation Products And Raw materials

Preparation Products

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