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Merck
CN

26049

Chlorophosphonazo III

for spectrophotometric det. of alkaline earth metals

Synonym(s):

Bis(4-chloro-2-phosphonobenzolazo)chromotropic acid

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About This Item

Empirical Formula (Hill Notation):
C22H16Cl2N4O14P2S2
CAS Number:
1914-99-4
Molecular Weight:
757.36
UNSPSC Code:
12352200
NACRES:
NA.21
PubChem Substance ID:
329752849
EC Number:
217-628-8
Beilstein/REAXYS Number:
2934871
MDL number:
MFCD00042698

Key Documents

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InChI key

LMBABJNSZGKTBA-NBHCHVEOSA-N

InChI

1S/C22H16Cl2N4O14P2S2/c23-10-1-3-12(14(7-10)43(31,32)33)25-27-19-16(45(37,38)39)5-9-6-17(46(40,41)42)20(22(30)18(9)21(19)29)28-26-13-4-2-11(24)8-15(13)44(34,35)36/h1-8,29-30H,(H2,31,32,33)(H2,34,35,36)(H,37,38,39)(H,40,41,42)/b27-25+,28-26+

SMILES string

Oc1c(\N=N\c2ccc(Cl)cc2P(O)(O)=O)c(cc3cc(c(\N=N\c4ccc(Cl)cc4P(O)(O)=O)c(O)c13)S(O)(=O)=O)S(O)(=O)=O

form

powder

quality

for spectrophotometric det. of alkaline earth metals

technique(s)

UV/Vis spectroscopy: suitable

Quality Level

100

Related Categories

General description

Chlorophosphonazo III is a highly sensitive reagent and can be used for the spectrophotometric determination of zirconium, titanium, thorium and scandium. It also finds application as an extractant, along with 1-butanol as solvent, for determination of micromolar concentrations of Nd(III), Th(IV) and U(VI) in brine. Above all that, it has two long wavelength maxima, one at 620 nm and one at 680 nm.

Application

Chlorophosphonazo III was used as a chromogenic agent along with PVC, during the determination of calcium via a disposable optical sensor.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Reagent for the spectrophotometric determination of alkaline earth metals

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
BCCK2401
BCCK2400
BCCH9733
BCCC2888
BCCC2890

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S M Baylor et al.
The Journal of physiology, 331, 139-177 (1982-10-01)
1. Changes in transmission of quasi-monochromatic light were measured in singly dissected, dye-injected twitch fibres following a single propagated action potential. The records, after correction for the intrinsic transmission signal, indicate changes in dye-related absorbance, DeltaA. This paper describes the
Extraction and spectrophotometric determination of Nd (III), Th (IV) and U (VI) in synthetic brine using Chlorophosphonazo III.
Chen JF
Analytica Chimica Acta, 284 (3), 593-597 (1994)
Simultaneous Spectrophotometric Determination of Calcium and Magnesium with Chlorophosphonazo III.
Ferguson JW.
Analytical Chemistry, 36 (4), 796-799 (1964)
M. Zenki
Analytical Chemistry, 53, 968-968 (1981)
Wei-Wen Liu et al.
Biomedical optics express, 12(2), 1154-1166 (2021-03-09)
This study demonstrates that chlorophosphonazo III (CPZ III) can be used as a contrast agent for photoacoustic calcium imaging. CPZ III can pass across the plasma membrane for labeling intracellular Ca2+ without cytotoxicity. In optical-resolution photoacoustic microscopy (OR-PAM), the photoacoustic
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