o-Hydroxyaniline
2-Aminophenol
CAS: 95-55-6
Molecular Formula: C6H7NO
o-Hydroxyaniline - Names and Identifiers
| Name | 2-Aminophenol |
| Synonyms | C.I. 76520 basfursol3ga 2-Aminophenol O-Aminophenol O-AMINOPHENOL 2-amino-pheno O-AMINO PHENOL 2-Amino Phenol BASF Ursol 3GA o-Hydroxyaniline 2-Hydroxyanaline 2-Hydroxyaniline 2-Hydroxyaniline H ortho amino phenol 2-hydroxybenzenamine C.I. Oxidation Base 17 1-Hydroxy-2-aminobenzene 2-Amino-1-hydroxybenzene 1-Amino-2-hydroxybenzene |
| CAS | 95-55-6 |
| EINECS | 202-431-1 |
| InChI | InChI=1/C6H7NO/c7-5-3-1-2-4-6(5)8/h1-4,8H,7H2 |
o-Hydroxyaniline - Physico-chemical Properties
| Molecular Formula | C6H7NO |
| Molar Mass | 109.13 |
| Density | 1.328 |
| Melting Point | 172 °C |
| Boling Point | 164 °C (11.2515 mmHg) |
| Flash Point | 168 °C |
| Water Solubility | 17 g/L (20 ºC) |
| Solubility | 17 g/L (20°C) |
| Vapor Presure | 14 hPa (153 °C) |
| Appearance | Powder |
| Color | White to brown |
| Merck | 14,461 |
| BRN | 606075 |
| pKa | 4.78, 9.97(at 20℃) |
| PH | 6.5-7.5 (10g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable, but may be air or light sensitive. Incompatible with strong oxidizing agents. |
| Refractive Index | 1.5444 (estimate) |
| Physical and Chemical Properties | Properties of white needle-like crystals, long time into brown or black, pure white needle-like crystals, soluble in water, ether or alcohol, slightly soluble in benzene, heating sublimation, easy to oxidize in the air, then change to brown or black. solubility: soluble in water, ethanol and ether, slightly soluble in benzene. It turned red in case of ferric chloride. With the formation of inorganic acids soluble in water salt. |
| Use | Useful as Analytical reagents and intermediates for diazonium dyes and sulfur dyes |
o-Hydroxyaniline - Risk and Safety
| Risk Codes | R20/22 - Harmful by inhalation and if swallowed. R68 - Possible risk of irreversible effects R34 - Causes burns R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37 - Wear suitable protective clothing and gloves. S28A - S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S68 - S20/22 - |
| UN IDs | UN 2512 6.1/PG 3 |
| WGK Germany | 2 |
| RTECS | SJ4950000 |
| FLUKA BRAND F CODES | 8-10-23 |
| TSCA | Yes |
| HS Code | 29222900 |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 1300 mg/kg |
o-Hydroxyaniline - Nature
Open Data Verified Data
The Pure product is a white needle-like crystal, which gradually turns black when exposed to light and in the air. Can sublimate. Density 1.328G/cm3. Melting Point 174 °c. Insoluble in benzene, soluble in ethanol and water. In the case of ferric chloride is red, and inorganic acid formation soluble in water salt.
Last Update：2024-01-02 23:10:35
o-Hydroxyaniline - Hair-making
Open Data Verified Data
O-nitrochlorobenzene in sodium hydroxide solution heating, under a certain pressure hydrolysis, O-nitrophenol sodium, and then with sulfide alkali reduction, and then with carbon dioxide acid, cooling, filtration, after immersion in sodium bisulfite solution, it was centrifuged and dried to obtain a finished product.
Last Update：2022-01-01 10:52:59
o-Hydroxyaniline - Use
Open Data Verified Data
dye intermediates for the manufacture of sulfur dyes, azo dyes, fur dyes and fluorescent brightener E.
Last Update：2022-01-01 10:52:58
o-Hydroxyaniline - Safety
Open Data Verified Data
toxic. With the toxicity of aniline and phenol. Can be absorbed through the skin caused by toxic dermatitis, and methemoglobin and asthma. Production equipment should be closed, the site should be well ventilated, the operator should wear protective equipment.
Last Update：2022-01-01 10:52:59
o-Hydroxyaniline - Reference Information
| chemical properties | pure products are white needle-like crystals, which gradually turn black when exposed to light and in the air. Insoluble in benzene, soluble in ethanol and water. |
| use | used as an important intermediate for dyes and medicine o-chlorophenol is the raw material of herbicide oxazolam and insecticide phosphorus, and is also a dye intermediate. Organic synthesis and dye intermediates. Used to produce acid medium blue R, sulfide yellow brown, fluorescent whitening agent EBF, etc. It is also a verification reagent for gold and silver. Absorbed by the skin can cause dermatitis, methemoglobin and asthma. used as analytical reagent and intermediate of diazo dye and sulfide dye |
| production method | it is obtained by reducing o-nitrophenol with sodium sulfide or hydrogen; It can also be prepared by hydrolysis and reduction of o-nitrochlorobenzene. 1. sodium sulfide reduction method 2. catalytic hydrogenation method the preparation method is to add o-nitrophenol and sodium sulfide in the reaction kettle, the reaction temperature is 120~125 ℃, the reaction time is 12h, and the reaction is continuously stirred, the reduction is completed, the cooling is completed, the hydrochloric acid is added to acidify to pH = 6~7, at this time o-aminophenol and sulfur are precipitated, cooled to room temperature, filtered, washed and filtered to dry to obtain crude products, the finished product is recrystallized with ethanol. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral administration-rat LD50: 1300 mg/kg; Oral administration-mouse LD50: 1250 mg/kg |
| stimulus data | eye-rabbit 100 mg mild |
| flammability hazard characteristics | combustible; combustion produces toxic nitrogen oxide smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |
| color index | 76520 |
| NIST chemical information | The information is: webbook.nist.gov provides (external link) |
| EPA chemical information | The information is: ofmpub.epa.gov provides (external link) |
| spontaneous combustion temperature | 190°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov provided (external link) |
Last Update：2024-04-09 15:16:36
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