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Merck
CN

323209

4-(2-Pyridylazo)resorcinol

96%

Synonym(s):

PAR

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About This Item

Empirical Formula (Hill Notation):
C11H9N3O2
CAS Number:
1141-59-9
Molecular Weight:
215.21
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
24859228
EC Number:
214-528-6
Beilstein/REAXYS Number:
184665
MDL number:
MFCD00006256

Key Documents

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InChI key

RJNYNDHYSJRRDW-BUHFOSPRSA-N

InChI

1S/C11H9N3O2/c15-8-4-5-9(10(16)7-8)13-14-11-3-1-2-6-12-11/h1-7,15-16H/b14-13+

SMILES string

Oc1ccc(\N=N\c2ccccn2)c(O)c1

assay

96%

form

powder

composition

Carbon: 58.6-64.2%

Nitrogen: 18.6-20.4%

technique(s)

titration: suitable

color

brown-red

mp

192-202 °C (lit.)

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

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General description

4-(2-Pyridylazo)resorcinol (PAR) is a monosodium salt(1), dibasic acid that forms the protonated complexes with most metal ions.

Application

4-(2-Pyridylazo)resorcinol (PAR) serves as a metallochromic indicator and is suitable as a chromogenic agent for the quantitative determination of over 50 elements.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN6339
BCCL7900
BCCK1111
BCCH6478
BCCD4113

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Douglas A Mitchell et al.
Biochemistry, 44(12), 4636-4647 (2005-03-23)
The inducible isoform of nitric oxide synthase (iNOS) and three zinc tetrathiolate mutants (C104A, C109A, and C104A/C109A) were expressed in Escherichia coli and purified. The mutants were found by ICP-AES and the zinc-specific PAR colorimetric assay to be zinc free
Gilles Montavon et al.
Dalton transactions (Cambridge, England : 2003), 39(5), 1366-1374 (2010-01-28)
Literature reports of the efficacy of para-sulfonatocalix[6]- and calix[8]-arenes as U(vi) complexants indicated that they might be useful for in vivo chelation of the novel therapeutic alpha-emitter (230)U. We have studied the complexation of U(vi) with para-sulfonatocalix[6]arene and para-sulfonatocalix[8]arene by
Xiaoyang Liu et al.
Marine drugs, 17(8) (2019-07-28)
In this study, three synthetic zinc-chelating peptides (ZCPs) derived from sea cucumber hydrolysates with limited or none of the common metal-chelating amino-acid residues were analyzed by flame atomic absorption spectroscopy, circular dichroism spectroscopy, size exclusion chromatography, zeta-potential, Fourier transform infrared
Mozhgan Khorasani-Motlagh et al.
Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine, 32(3), 521-532 (2019-02-14)
The biosynthesis of the dinuclear metal cluster at the active sites of the [NiFe]-hydrogenase enzymes is a multi-step process executed by a suite of accessory proteins. Nickel insertion during maturation of Escherichia coli [NiFe]-hydrogenase 3 is achieved by the metallochaperones
Edson Luiz Silva et al.
Journal of hazardous materials, 171(1-3), 1133-1138 (2009-08-04)
A procedure for simultaneous separation/preconcentration of copper, zinc, cadmium, and nickel in water samples, based on cloud point extraction (CPE) as a prior step to their determination by inductively coupled plasma optic emission spectrometry (ICP-OES), has been developed. The analytes
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