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323209

Sigma-Aldrich

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
Beilstein:
184665
EC Number:
214-528-6
MDL number:
MFCD00006256
UNSPSC Code:
12171500
PubChem Substance ID:
24859228
NACRES:
NA.47

Quality Level

200

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

SMILES string

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

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+

InChI key

RJNYNDHYSJRRDW-BUHFOSPRSA-N

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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 Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCD4113
BCCB9862
BCBZ3335
BCBX4117
BCBT9737

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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
Aysen Hol et al.
Environmental monitoring and assessment, 184(6), 3469-3479 (2011-06-28)
This paper reports the utilization of 4-(2-pyridylazo) resorcinol (PAR) as a chelating reagent for in-column derivatization and the determination of trace Co, Fe, and Ni ions by reversed-phase high-performance liquid chromatography with photodiode array detector. A good separation of Co
Leon Barron et al.
Journal of chromatography. A, 1213(1), 31-36 (2008-09-10)
The selectivity, retention and separation of transition metals on a short (2 mm x 50 mm) column packed with a poly-iminodiacetic acid functionalised polymer 10 microm resin (Dionex ProPac IMAC-10) are presented. This stationary phase, typically used for the separation
Tahereh Rohani et al.
Talanta, 80(5), 1827-1831 (2010-02-16)
A 4-(2-pyridylazo)-resorcinol (PAR)-modified carbon ceramic electrode (CCE) prepared by the sol-gel technique has been reported for the first time in this paper. By immersing the CCE in aqueous solution of PAR (0.001molL(-1)), after a short period of time, a thin
Asif Riaz et al.
Electrophoresis, 26(3), 668-673 (2005-02-04)
Transient isotachophoresis (TITP) is usually performed under low-electroosmotic flow (EOF) conditions using a coated capillary or a low pH background electrolyte. We used a bare fused-silica capillary for TITP stacking of anionic complexes of some heavy metals under high-EOF conditions
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