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
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) |
 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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