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HomeProduct name list4-(4-Nitrophenyl)azoresorcinol

4-(4-Nitrophenyl)azoresorcinol

Synonym(s):4-(4-Nitrophenylazo)-resorcinol;Azoviolet;Magneson I

  • CAS NO.:74-39-5
  • Empirical Formula: C12H9N3O4
  • Molecular Weight: 259.22
  • MDL number: MFCD00007310
  • EINECS: 200-808-5
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-08-08 13:40:43
4-(4-Nitrophenyl)azoresorcinol  Structural

What is 4-(4-Nitrophenyl)azoresorcinol ?

Chemical properties

dark red to brown crystalline powder

The Uses of 4-(4-Nitrophenyl)azoresorcinol

4-(4-Nitrophenyl)azoresorcinol is used for the detection of magnesium with which it yields a bright blue color in alkaline solution and it also used to determine molybdenum with which it forms a red-violet complex: Nikitina, Andrianova, C.A. 75, 136789v (1971).

The Uses of 4-(4-Nitrophenyl)azoresorcinol

It is a derivitized resorcinol dye compound with an absorption maximum of 432 nm. Used as a pH indicator.

Definition

ChEBI: An azobenzene in which the phenyl rings are 4-nitro- and 2,4-dihydroxy-substituted respectively.

Biochem/physiol Actions

4-(4-Nitrophenylazo)resorcinol is a pH indicator.

Purification Methods

Crystallise the dye from EtOH. [Beilstein 16 H 181, 16 IV 1266.]

Properties of 4-(4-Nitrophenyl)azoresorcinol

Melting point: 195-200 °C (dec.)(lit.)
Boiling point: 402.47°C (rough estimate)
Density  1.3450 (rough estimate)
refractive index  1.5700 (estimate)
storage temp.  Store below +30°C.
pka 8.05±0.35(Predicted)
form  Powder
color  Orange-red to red
Odor Odorless
Water Solubility  Soluble in dilute sodium hydroxide. Insoluble in water.
Merck  14,5695
BRN  674709
Stability: Stable. Incompatible with strong oxidizing agents, strong bases.
CAS DataBase Reference 74-39-5(CAS DataBase Reference)
EPA Substance Registry System 1,3-Benzenediol, 4-[(4-nitrophenyl)azo]- (74-39-5)

Safety information for 4-(4-Nitrophenyl)azoresorcinol

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405:Store locked up.

Computed Descriptors for 4-(4-Nitrophenyl)azoresorcinol

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