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Merck
CN

114669

4-(4-Nitrophenylazo)resorcinol

Dye content 90 %

Synonym(s):

Azoviolet, Magneson I

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About This Item

Linear Formula:
O2NC6H4N=NC6H3-1,3-(OH)2
CAS Number:
74-39-5
Molecular Weight:
259.22
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
24847188
EC Number:
200-808-5
Beilstein/REAXYS Number:
674709
MDL number:
MFCD00007310

Key Documents

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InChI

1S/C12H9N3O4/c16-10-5-6-11(12(17)7-10)14-13-8-1-3-9(4-2-8)15(18)19/h1-7,16-17H/b14-13+

InChI key

NGPGYVQZGRJHFJ-BUHFOSPRSA-N

SMILES string

Oc1ccc(\N=N\c2ccc(cc2)[N+]([O-])=O)c(O)c1

form

powder

composition

Dye content, 90%

mp

195-200 °C (dec.) (lit.)

λmax

432 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

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Biochem/physiol Actions

4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)2 in alkaline solution. It is mainly used for determining the presence of magnesium in the solution.
4-(4-Nitrophenylazo)resorcinol is a pH indicator.

Storage Class

11 - Combustible Solids

wgk

WGK 3

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM8653
BCCL8095
BCCJ2652
BCCF6341
BCCF6342

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Kuang Lu Cheng, Keihei Ueno, Toshiaki Imamura
CRC Handbook of Organic Analytical Reagents (1992)
Cheng K L
CRC Handbook of Organic Analytical Reagents (1992)
National Research Council (U.S.). Food Protection Committee
Food Chemicals Codex (1967)
Highly sensitive determination method for total carbonate in water samples by flow injection analysis coupled with gas-diffusion separation.
Oshima M, et al.
Analytical Sciences, 17, 1285-1290 (2001)
R. Gopalan
Inorganic Chemistry for Undergraduates (2009)

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