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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. | form | Powder | pka | 8.05±0.35(Predicted) | 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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