C.I. 37120 (free base) (VAN)
2-Methoxy-5-Chloroaniline
CAS: 95-03-4
Molecular Formula: C7H8ClNO
C.I. 37120 (free base) (VAN) - Names and Identifiers
C.I. 37120 (free base) (VAN) - Physico-chemical Properties
| Molecular Formula | C7H8ClNO |
| Molar Mass | 157.6 |
| Density | 1.1760 (rough estimate) |
| Melting Point | 81-83°C(lit.) |
| Boling Point | 135 °C (5.85078 mmHg) |
| Flash Point | 136 °C |
| Solubility | Chloroform (Slightly), DMSO (Slightly) |
| Vapor Presure | 0.013mmHg at 25°C |
| Appearance | Solid |
| Color | Pale Grey to Light Grey |
| BRN | 879161 |
| pKa | 3.48±0.10(Predicted) |
| Storage Condition | Amber Vial, -20°C Freezer, Under inert atmosphere |
| Stability | Light Sensitive |
| Refractive Index | 1.5430 (estimate) |
| Physical and Chemical Properties | Melting Point: 81 - 85 ℃ Boiling Point: 135 ℃ |
C.I. 37120 (free base) (VAN) - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - 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. S36/37 - Wear suitable protective clothing and gloves. |
| UN IDs | UN 2233 6.1/PG 3 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29222990 |
| Hazard Class | 6.1 |
| Packing Group | III |
C.I. 37120 (free base) (VAN) - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | red base RC is mainly used for cotton dyeing and cotton printing, also used for viscose fiber, silk, dyeing of nylon. Stained red by coupling with phenol AS-OL. The coupling ability was medium, and the coupling speed was medium. dye intermediate. |
| production method | is obtained by methoxylation and reduction of 2, 5-dichloronitrobenzene. with 4-chloro-o-nitroanisole as raw material, the crude product is reduced with iron powder, and then hydrochloric acid is made into hydrochloride to obtain the finished product.. 4000kg of water and of formic acid were added to the reducing pan, then of 4-chloro-o-nitroanisole was added, the mixture was stirred and heated to boiling, and of iron chips were added, it takes about 10-12H. When the iron filings were added to 2000kg (or the reaction rate tended to be slow), additional formic acid was added. After completion of the reaction, 800L of naphtha was added for extraction, and the naphtha layer was separated by standing. The iron oxide was further extracted with naphtha 2 times, each time 800L. Merge naphtha layers. The naphtha was distilled off with superheated steam, and the 4-chloro-anthranilic ether-water layer was vacuum distilled to obtain a crude 4-chloro-anthranilic ether having a melting point of about 79 °c. Due to the instability of the product, vacuum distillation was carried out in several portions (only a small amount was distilled at a time). Add 2000L 8% dilute hydrochloric acid into the salt pan, stir to warm up to 70 ℃, add 600kg 4-chloro-anthranilate, stir at 70 ℃ for 2H, then add 450kg 40% hydrochloric acid, cool to 15-20 ℃, the product was precipitated, vacuum filtered, dehydrated, dried at 70-75 °c, and ground to a finished product. The mother liquor can be reused for 7-8 times. |
Last Update：2024-04-09 02:00:12
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View History
C.I. 37120 (free base) (VAN)
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