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Safety Information

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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

323209-1G:
323209-5G:
323209-BULK:
323209-VAR:
323209-25G:
323209-500G:

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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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