MNA
2-Methyl-4-nitroaniline
CAS: 99-52-5
Molecular Formula: C7H8N2O2
MNA - Names and Identifiers
MNA - Physico-chemical Properties
| Molecular Formula | C7H8N2O2 |
| Molar Mass | 152.15 |
| Density | 1.1586 |
| Melting Point | 130-132°C(lit.) |
| Boling Point | 294.61°C (rough estimate) |
| Flash Point | 157.2℃ |
| Solubility | Dichloromethane, DMSO, Ethyl Acetate, Methanol |
| Vapor Presure | 20.4hPa at 133.5℃ |
| Appearance | Crystalline Powder or Fine Needles |
| Color | Yellow to khaki or brownish |
| BRN | 775772 |
| pKa | 0.92±0.10(Predicted) |
| PH | 7 (H2O)(aqueous suspension) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.6276 (estimate) |
| Physical and Chemical Properties | Characteristic yellow crystals. melting point 134~135 ℃ relative density 1.1586 flash point 157.2 ℃ soluble in ethanol, benzene and acetic acid. |
| Use | Mainly used for cotton, hemp fiber fabric dyeing and printing color, also used for the production of coatings |
MNA - Risk and Safety
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R33 - Danger of cumulative effects R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S28A - |
| UN IDs | UN 2660 6.1/PG 3 |
| WGK Germany | 2 |
| RTECS | XU8210000 |
| TSCA | Yes |
| HS Code | 29214300 |
| Hazard Note | Irritant |
| Hazard Class | 6.1 |
| Packing Group | III |
MNA - Nature
Open Data Verified Data
yellow crystals. Flammable. The relative density was 1.1586. The melting point was 134-135 °c. Flash point 157.2 °c. Soluble in ethanol, benzene and acetic acid.
Last Update：2024-01-02 23:10:35
MNA - Preparation Method
Open Data Verified Data
the amino group of o-toluidine is protected by acylation with benzenesulfonyl chloride, then nitrated with nitric acid, and hydrolyzed with sulfuric acid to remove the benzenesulfonyl group and neutralized to obtain a finished product.
Last Update：2022-01-01 10:51:47
MNA - Use
Open Data Verified Data
ice dye base, such as red base RL. Mainly used for cotton, hemp fiber fabric dyeing and printing color. It can also be used in the production of coatings.
Last Update：2022-01-01 10:51:46
MNA - Safety
Open Data Verified Data
- This product is toxic. Easily absorbed by the skin, but can be excreted with urine. See p-nitroaniline.
- the use of plywood barrel lined plastic bag packaging. 30kg per barrel. Storage and Transportation to prevent heat, moisture. Hazardous materials shall be stored and transported according to regulations.
Last Update：2022-01-01 10:51:47
MNA - Reference Information
| Color index | 37100 |
| LogP | 1.311 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | is mainly used for dyeing and printing color development of cotton and hemp fiber fabrics, also used in the production of coatings The product is ice dye dye base (red base RL), mainly used for cotton, hemp fiber fabric dyeing and printing color, can also be used for the production of coatings. |
| production method | o-toluidine and p-methanesulfonyl chloride are used as raw materials through condensation, nitration and hydrolysis, neutralization and filtration and drying. Raw material consumption quota: o-toluidine (industrial) 945kg/t, caustic soda (100%)1350kg/t, benzenesulfonyl chloride (industrial) 1650kg/t, sodium bicarbonate (industrial) 40kg/t, chlorobenzene (industrial) 460kg/t, sulfuric acid (100%)3100kg/t, nitric acid (98%)680kg/t, ammonia (20%)6230kg/t, sodium nitrite 10kg/t, sodium sulfite (industrial) 26kg/t. |
| category | toxic substances |
| flammability hazard characteristics | open flame flammability; High thermal decomposition; Emission of toxic NOx smoke |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature, separate storage of food additives |
| fire extinguishing agent | carbon dioxide, foam, sand, water mist |
Last Update：2024-04-09 15:16:52
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View History
MNA
1-Ethoxycarbonylpiperidine
MONOTRIDECYLAMINE
三苯氧胺
N-ACETYL-4-NITROPHENETHYLAMINE
4-trans-Methylcyclohexanol
conaca
Quinoleine-8-ol
WS-3
2,6-Di-tert-butyl-4-methylcyclohexanol
1-Ethoxycarbonylpiperidine
MONOTRIDECYLAMINE
三苯氧胺
N-ACETYL-4-NITROPHENETHYLAMINE
4-trans-Methylcyclohexanol
conaca
Quinoleine-8-ol
WS-3
2,6-Di-tert-butyl-4-methylcyclohexanol