2-Methoxy-4-nitroaniline
Brilliant Red Developing Base 4B
CAS: 97-52-9
Molecular Formula: C7H8N2O3
2-Methoxy-4-nitroaniline - Names and Identifiers
| Name | Brilliant Red Developing Base 4B |
| Synonyms | RED B ASE C.I. 37125 Red base B RED B BASE diabaseredb redbasecibav redbaseirgav diazofastredb fastred5nabase Fast Red Base B Fast Red B base Diazo fast red b Fast red 5na base Fast Red B-T Base 4-Nitro-o-anisidine hiltonilfastredbbase METHOXY-4-NITROANILINE 4-NITRO-ORTHO-ANISIDINE Hiltonil Fast Red B base 2-Methoxy-4-nitroaniline C.I.Azoic Diazo Component 5 C.I. Azoic Diazo Component 5 Benzenamine, 2-methoxy-4-nitro- Brilliant Red Developing Base 4B -Amino-5-nitrophenyl methyl ether |
| CAS | 97-52-9 |
| EINECS | 202-588-6 |
| InChI | InChI=1/C7H8N2O3/c1-12-7-4-5(9(10)11)2-3-6(7)8/h2-4H,8H2,1H3 |
| InChIKey | GVBHRNIWBGTNQA-UHFFFAOYSA-N |
2-Methoxy-4-nitroaniline - Physico-chemical Properties
| Molecular Formula | C7H8N2O3 |
| Molar Mass | 168.15 |
| Density | 1,211 g/cm3 |
| Melting Point | 140-142°C(lit.) |
| Boling Point | 337.07°C (rough estimate) |
| Flash Point | 174°C |
| Water Solubility | slightly soluble |
| Solubility | 0.2g/l |
| Vapor Presure | 1.71E-05mmHg at 25°C |
| Appearance | Crystalline Powder |
| Color | Yellow to orange |
| BRN | 879619 |
| pKa | 1.02±0.10(Predicted) |
| PH | 6.2 (0.2g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.6010 (estimate) |
| Physical and Chemical Properties | Water-soluble soda powder Appearance: yellow powder Content: ≥ 98% Melting Point: 137.0 ℃ ~ 141.0 ℃ |
| Use | Mainly used for cotton fabric dyeing and printing color, also used for the manufacture of fast pigment, jujube, golden, black and other organic pigments |
2-Methoxy-4-nitroaniline - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S36/37 - Wear suitable protective clothing and gloves. |
| UN IDs | UN 3077 9 / PGIII |
| WGK Germany | 2 |
| RTECS | BZ7170000 |
| TSCA | Yes |
| HS Code | 29222900 |
| Hazard Note | Irritant |
2-Methoxy-4-nitroaniline - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | mainly used for dyeing and printing color development of cotton fiber fabrics, and also used for manufacturing fast pigment, jujube, golden yellow, black and other organic pigments The product is ice dye base, mainly used for cotton fabric dyeing printing color developer, also used in the manufacture of fast pigment, jujube, golden yellow, black and other organic pigments. for the synthesis of pigment yellow 74#. Cotton fiber. |
| production method | O-methoxyaniline N-p-Toluenesulfonyl chloride is condensed in the presence of sodium carbonate to give N-p-Toluenesulfonyl O-methoxyaniline, further, 4-nitro-2-methoxy-n-p-Toluenesulfonyl aniline was obtained by Nitration with nitric acid, and the nitrates were treated with dilute sulfuric acid and hydrolyzed to remove P-methylbenzenesulfonyl to obtain a finished product. O-methoxyaniline and equimolar amounts of p-methylbenzenesulfonyl chloride were added to water at 85 ° C., and sodium carbonate was added to adjust the pH of the reaction solution to 8. After reaching the end point of the reaction, the reaction mixture was cooled to 60 ° C., adjusted to pH 6 with sulfuric acid, cooled to 45 ° C., and filtered to obtain N-p-Toluenesulfonyl-o-methoxyaniline in 99% yield. Chlorobenzene was added to the nitrifier and the above-described condensation product was charged. Sodium nitrite was added with stirring at 30-33 °c and 82% nitric acid was slowly added at a temperature not exceeding 50 °c. After cooling to 35 ℃ in about 15min, the condensation product and nitric acid were added in proportion. The feeding time was 3.5h, and the reaction temperature was controlled at 35-45 ℃. After completion of the addition, the reaction was continued for 1.5h at 50 °c. It was cooled to 30 ° C. And filtered. The filter cake was washed with chlorobenzene and water, and dried to give 4-nitro-2-methoxy-n-p-toluenesulfonylaniline in 85% yield. The nitrates were added to 82%-83% sulfuric acid at 78 °c and incubated at 90 °c for 2.5h after the addition. After dilution with water, neutralization with alkali to pH 7.5, pressure filtration was carried out at 30 ° C., washing with 5% soda ash solution and water successively, and drying, to obtain 2-methoxy-4-nitroaniline in 95% yield. The resulting product was a yellow or tan powder. Content (dry basis) ≥ 98%. Raw material consumption quota: O-methoxy aniline 960kg/t, P-Toluenesulfonyl chloride 1540kg/t. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 997 mg/kg |
| flammability hazard characteristics | open flame flammable; Toxic aniline and nitrogen oxide gases emitted by heat |
| 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, carbon dioxide, sand, dry powder |
Last Update：2024-04-09 21:11:58
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