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| | 4-(4-Nitrophenyl)azoresorcinol Basic information | | Description |
| | 4-(4-Nitrophenyl)azoresorcinol Chemical Properties |
| 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) |
| Hazard Codes | Xi | | Risk Statements | 36/38 | | Safety Statements | 26-36 | | WGK Germany | 3 | | RTECS | VH2810000 | | TSCA | Yes | | HS Code | 29270000 |
| | 4-(4-Nitrophenyl)azoresorcinol Usage And Synthesis |
| Description | Oxygen violet can be prepared by one-step reaction of p-nitroaniline and 1,3-benzenediol. Azo violet can be used to prepare an azobenzene photochromic liquid crystal compound. Photochromic liquid crystal compounds have both photochromic properties and liquid crystallinity, which has become a research hotspot in the field of information storage. Azobenzene-based liquid crystals are the most interesting photochromic liquid crystal materials in recent years due to their unique photoinduced cis-trans isomerism. Azobenzene compounds undergo reversible cis-trans isomerization under the action of light, which makes them have great potential applications in many aspects such as optical storage, photo-holography and optical information processing. | | Chemical Properties | dark red to brown crystalline powder | | Uses | 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).
| | Uses | 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.] |
| | 4-(4-Nitrophenyl)azoresorcinol Preparation Products And Raw materials |
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