132-68-3
Naphthol AS-BO
CAS: 132-68-3
Molecular Formula: C21H15NO2
132-68-3 - Names and Identifiers
132-68-3 - Physico-chemical Properties
| Molecular Formula | C21H15NO2 |
| Molar Mass | 313.35 |
| Density | 1.333±0.06 g/cm3(Predicted) |
| Melting Point | 222~223℃ |
| Boling Point | 479.3±28.0 °C(Predicted) |
| Flash Point | 243.6°C |
| Vapor Presure | 8.27E-10mmHg at 25°C |
| Appearance | Light yellow yellow powder |
| Color | White to Light gray to Light orange |
| pKa | 8.73±0.40(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.778 |
| MDL | MFCD00043900 |
| Physical and Chemical Properties | Properties light beige powder. melting point 222~223 ℃ solubility: soluble in xylene. Dissolved in caustic soda solution is yellow. Insoluble in water and soda ash solution. |
| Use | Mainly used for cotton fabric printing and dyeing priming agent, and for fast pigment and organic pigment intermediates |
132-68-3 - Risk and Safety
| RTECS | QJ1897300 |
132-68-3 - Upstream Downstream Industry
| Raw Materials | Chlorobenzene Phosphorus trichloride Sodium carbonate |
132-68-3 - Reference Information
| color index | 37560 |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | chromophenol AS-BO(N-naphthalene-1-yl-3-hydroxynaphthalene-2-formamide) is mainly used for dyeing cotton fiber and cotton printing primer, and is also used for dyeing vinylon, viscose fiber, silk and nylon. With red base B, it is dyed with purple sauce and has good sun fastness. N-naphthalene-1-yl-3-hydroxynaphthalene-2-formamide is mainly used as a primer for cotton fiber dyeing and printing, as an intermediate for organic pigments, and for the manufacture of fast pigments. it can be used for dyeing cotton yarn, cotton fabric, cotton knitted fabric, corduroy, polyvinyl alcohol, viscose, silk, nylon and other fibers, and is generally not used for printing. The product has high affinity for cotton and strong coupling ability. Can be made into quick pigment, neutral particle pigment and organic pigment. |
| Production method | Using 2,3-acid and 1-naphthylamine as raw materials, the 2,3-acid is first made into sodium salt, and then in the presence of phosphorus trichloride Condensation with 1-naphthylamine, after neutralization, distillation, filtration, washing, and drying to obtain the finished product.. Add 4000-5000L chlorobenzene, 500L 30% sodium hydroxide and 2,3-acid 630kg (100%) into the salt-forming pot. The temperature is heated and dehydrated to 134-135 ℃, and the transparent and anhydrous in the distilled liquid is the end point. The volume of feed liquid is about 2800-3000L. The above salt-forming solution is pressed into a condensation pot, 1-naphthylamine 479kg (100%) is added when it is cooled to 90 ℃, the cooling is continued to about 67 ℃, and phosphorus trichloride-chlorobenzene mixed solution (55%-60% mixed solution composed of 230kg phosphorus trichloride and anhydrous chlorobenzene) is uniformly added within 2 hours. After adding, the temperature is 118-120 ℃, and the temperature is kept for 2 hours. Add 1000L of water and 330L of 30% sodium hydroxide in the distillation kettle, then press the condensation liquid, stir for 15min, and control pH = 8-8.5. Then direct steam is introduced to steam chlorobenzene until the distilled liquid is clear and free of chlorobenzene. Add hot water above 90 ℃ for washing until the filtrate is clarified, dehydrated and dried to obtain about 960kg of finished product. N-naphthalene-1-yl-3-hydroxynaphthalene-2-formamide can be formed by condensation of 2-hydroxy-3-naphthoic acid and methylnaphthylamine in the presence of phosphorus trichloride. Using 2,3 acids as raw materials, chlorobenzene and caustic soda are used to salt, dehydrate, and then condensed with methyl naphthylamine and phosphorus trichloride, and then neutralized, distilled, filtered, washed and dried. Raw material consumption (kg/t)2,3 acids (100%) 660 carmine 500 phosphorus trichloride 250 chlorobenzene (98%) 173 soda ash (98%) 500 |
Last Update：2024-04-09 19:05:10
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Raw Materials for 132-68-3