99-55-8
2-Methyl-5-nitroaniline
CAS: 99-55-8
Molecular Formula: C7H8N2O2
99-55-8 - Names and Identifiers
99-55-8 - Physico-chemical Properties
| Molecular Formula | C7H8N2O2 |
| Molar Mass | 152.15 |
| Density | 1.2333 (estimate) |
| Melting Point | 103-106°C(lit.) |
| Boling Point | 294.61°C (rough estimate) |
| Appearance | Crystallization |
| Color | Ochre to yellow-orange |
| Exposure Limit | ACGIH: TWA 1 mg/m3 |
| BRN | 879021 |
| pKa | 2.34±0.10(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents, acid chlorides, acid anhydrides, acids, chloroformates. |
| Sensitive | Easily absorbing moisture |
| Refractive Index | 1.6276 (estimate) |
| MDL | MFCD00007741 |
| Physical and Chemical Properties | Melting point 104-107°C water-soluble <0.1g/100 mL at 19°C |
| Use | For Organic synthesis |
99-55-8 - Risk and Safety
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R40 - Limited evidence of a carcinogenic effect R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | 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. |
| UN IDs | UN 2660 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | XU8225000 |
| TSCA | Yes |
| HS Code | 29214300 |
| Hazard Note | Irritant |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD50 orl-rat: 574 mg/kg NCIMR* NIH-71-E-2144,73 |
99-55-8 - Introduction
Soluble in alcohol, ether and acetone, insoluble in water.
Last Update：2022-10-16 17:30:32
99-55-8 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| (IARC) carcinogen classification | 3 (Vol. 48) 1990 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | Water dye large red base G, scientific name 2-amino-4-nitrotoluene, it is an important component of insoluble azo dyes, mainly used for cotton fabric dyeing and printing. The content of the product is more than 98% and the melting point is 107 ℃. The large red base G is a golden yellow crystal. Insoluble in water, soluble in ethanol, ether, benzene and acetone. The coupling ability is strong, and the coupling speed is medium. |
| Application | 2-amino-4-nitrotoluene is mainly used for dyeing and printing of cotton fabrics, with the phenol as or AS-D coupling dye Red (ie, flag red), can also be used for silk, viscose and nylon fabric dyeing, also used as an intermediate of organic pigments. |
| Use | This product is an intermediate of a dye such as strong red. It is mainly used as a color developing agent for dyeing and printing cotton fabrics (mainly used for dyeing red cloth, that is, flag red cloth), and can also be used for dyeing silk and nylon fabrics. It can also be used as an intermediate of organic pigment. as a coloring base for ice dye, it can be used for dyeing and printing cotton fabrics, and can also be used as an intermediate for organic pigments and dyes In organic synthesis |
| production method | o-toluidine is used as raw material, after salt formation, nitrification, water analysis, dissolution and decolorization, neutralization and dehydration and drying. The nitric acid having a relative density of 1.4 is cooled to below 20 ° C., dry powdery O-methylacetanilide is added under stirring, the temperature is controlled below 70 ° C., and cooled to obtain a yellow solid. It is added to sulfuric acid reflux, 2H after cooling filter insoluble material, below 40 deg C with 40% sodium hydroxide neutralization to pH = 1-2, yellow crystals. 5-nitro-o-toluidine was obtained by filtration, washing with water and recrystallization from ethanol. Raw material consumption quota: o-toluidine 876kg/t, sulfuric acid (100%)4350kg/t, nitric acid (98%)520kg/t, soda ash (98%)1700kg/t, activated carbon 1kg/t. |
| category | toxic substances |
| toxicity grade | low toxicity |
| Acute toxicity | Reference range: oral-rat LD50: 6860 mg/kg |
| flammability hazard characteristics | open flame flammable; Thermal decomposition releases toxic aniline and nitrogen oxide gases |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| fire extinguishing agent | water, foam, sand, carbon dioxide |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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