2-氨基-4-甲基酚
2-Amino-p-cresol
CAS: 95-84-1
Molecular Formula: C7H9NO
2-氨基-4-甲基酚 - Names and Identifiers
| Name | 2-Amino-p-cresol |
| Synonyms | 2-Amino-p-cresol 2-amino-para-cresol O-AMINO P-METHPHENOL 2-amino-4-methyl-pheno O-Amino-P-Methylphenol Phenol, 2-amino-4-methyl- (2-Hydroxy-5-methylphenyl)amine 1-Amino-2-hydroxy-5-methylbenzene 2-Amino-p-cresol, 2-Hydroxy-5-methylaniline, 3-Amino-4-hydroxytoluene |
| CAS | 95-84-1 |
| EINECS | 202-457-3 |
| InChI | InChI=1/C7H9NO/c1-5-2-3-7(9)6(8)4-5/h2-4,9H,8H2,1H3 |
2-氨基-4-甲基酚 - Physico-chemical Properties
| Molecular Formula | C7H9NO |
| Molar Mass | 123.15 |
| Density | 1.0877 (rough estimate) |
| Melting Point | 133-136°C(lit.) |
| Boling Point | 229.26°C (rough estimate) |
| Water Solubility | slightly soluble |
| Solubility | slightly soluble |
| Appearance | Flakes or Crystalline Powder |
| Color | Beige to gray-brown |
| BRN | 606494 |
| pKa | 10.06±0.18(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Refractive Index | 1.5706 (estimate) |
| MDL | MFCD00007699 |
| Physical and Chemical Properties | Appearance: white to gray crystalline powder or granular Crystal Content: ≥ 98% Melting Point: 134~136 ℃ moisture: ≤ 0.5% Ash: ≤ 0.5% |
| Use | Used as a dye intermediate, also used in the preparation of fluorescent whitening agent |
2-氨基-4-甲基酚 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 2 |
| RTECS | SJ6078000 |
| TSCA | Yes |
| HS Code | 29222900 |
2-氨基-4-甲基酚 - Nature
Open Data Verified Data
The appearance was gray-white crystals. Melting point 135 °c (137 °c). Soluble in ethanol, ether, chloroform and other organic solvents. Slightly soluble in water, benzene. Soluble in hot water. It is easy to oxidize and change color when exposed to air.
Last Update：2024-01-02 23:10:35
2-氨基-4-甲基酚 - Preparation Method
Open Data Verified Data
with p-cresol as raw material, nitric acid, sulfuric acid mixed acid with a certain concentration for nitration, reaction completion, separation of waste acid, after washing and distillation with sulfide alkali reduction, and finally after acid precipitation, crystallization, drying to obtain the finished product.
The hydroreduction method is the same as the 1 method, but is carried out in the presence of a catalyst. Hydrogen reduction was used instead of the alkali sulfide reduction.
Last Update：2022-01-01 10:53:02
2-氨基-4-甲基酚 - Introduction
Easily soluble in ethanol, ether, chloroform, slightly soluble in water and benzene. Soluble in hot water. Oxidation and discoloration in case of air.
Last Update：2022-10-16 17:30:20
2-氨基-4-甲基酚 - Use
Open Data Verified Data
dye intermediate, mainly used for fluorescent whitening agent DT.
Last Update：2022-01-01 10:53:01
2-氨基-4-甲基酚 - Safety
Open Data Verified Data
brown or orange Flake crystals. A water melting point of 80~90 deg C, anhydrous melting point of 145~147 deg C (142~143 deg C; 195~198 deg C decomposition). Soluble in acetic acid, ethanol and ether, slightly soluble in water.
Last Update：2022-01-01 10:53:02
2-氨基-4-甲基酚 - Safety
Open Data Verified Data
toxic. Has a stimulating effect on the skin. The equipment in the production site should be sealed and well ventilated. Production operators should wear protective equipment. Packed in plastic bags lined with iron or cardboard barrels. 25kg or 50kg net per barrel. According to the general provisions of the storage and transportation of chemicals.
Last Update：2022-01-01 10:53:03
2-氨基-4-甲基酚 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | used as dye intermediate, also used in the preparation of fluorescent whitening agent dye intermediate, used in the production of fluorescent whitening agent DT, etc. |
| production method | O-nitrop-cresol is obtained by reduction with sulfide base or catalytic hydrogenation. Starting from the nitration of p-cresol raw material consumption quota: P-cresol industrial products 963kg/t, nitric acid (96%)661kg/t, sulfuric acid (92.5%)2127kg/t, sulfide alkali (60%)2425kg/t, soda ash 20kg/t. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | Reference range: Peritoneal-mouse LD50: 680 mg/kg |
| flammability hazard characteristics | flammability; Toxic NOx smoke from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
Last Update：2024-04-09 15:16:53
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View History
2-氨基-4-甲基酚
DPEPhos
2-(5-氟-2-甲基苯基)吡啶-3-醇
3-氨基甲基-6-甲基吡啶
2-甲基-3-硝基苄醇
DI-2-ETHYLHEXYLAMMONIUM HEXAFLUOROPHOSPHATE
二氯化[(1S)-1-(3H-咪唑基-1-嗡-4-基甲基)-2-甲氧基-2-氧代-乙基]铵
N N-DIETHYLAMINOETHYL BROMIDEHYDROBROMIDE
4-[2-(2-氨基-4,7-二氢-4-氧代-1H-吡咯并[2,3]嘧啶-5-基)乙基]苯甲酰基-L-谷氨酸二乙酯
TRI-P-ISOPROPYLPHENYLPHOSPHATE
DPEPhos
2-(5-氟-2-甲基苯基)吡啶-3-醇
3-氨基甲基-6-甲基吡啶
2-甲基-3-硝基苄醇
DI-2-ETHYLHEXYLAMMONIUM HEXAFLUOROPHOSPHATE
二氯化[(1S)-1-(3H-咪唑基-1-嗡-4-基甲基)-2-甲氧基-2-氧代-乙基]铵
N N-DIETHYLAMINOETHYL BROMIDEHYDROBROMIDE
4-[2-(2-氨基-4,7-二氢-4-氧代-1H-吡咯并[2,3]嘧啶-5-基)乙基]苯甲酰基-L-谷氨酸二乙酯
TRI-P-ISOPROPYLPHENYLPHOSPHATE