4-nitrotoluene; p-nitrotoluene
Basic Information:
English name：4-Nitrotoluene；
CAS number: 99-99-0
Molecular formula: C7H7NO2
Molecular weight: 137.14
EINECS number: 202-808-0
Structural formula:
Related categories: Organic chemical raw materials; Nitro compounds; Pesticide intermediate.
Melting point: 52-54 °C (lit.)
Boiling point: 238 °C (lit.)
Density: 1.392 g/mL at 25 °C (lit.)
Refractive index: n20/D 1.5382
Flash point: 223 °F
Solubility: insoluble in water, soluble in ethanol, ether and benzene.
Properties: Light yellow rhombic hexagonal crystal.
Vapor pressure: 5 mm Hg (85 °C)
| Specification | Unit | Standard |
| Appearance | Yellowish solid | |
| Main content | % | ≥99.0% |
| Moisture | % | ≤0.1 |
It is an important chemical raw material, mainly used as an intermediate of pesticide, dye, medicine, plastic and synthetic fiber auxiliaries. Such as herbicide chloromyron, etc., can also manufacture p-toluidine, p-nitrobenzoic acid, p-nitrotoluene sulfonic acid, 2-chloro-4-nitrotoluene, 2-nitro-4-methylaniline, dinitrotoluene and so on.
The preparation method is to add toluene to the nitrification reactor, cool it to below 25℃, add the mixed acid (nitric acid 25% ~ 30%, sulfuric acid 55% ~ 58% and water 20% ~ 21%), the temperature rises, adjust the temperature not to exceed 50℃, continue to stir for 1 ~ 2 hours to end the reaction, stand for 6h, the generated nitrobenzene separation, washing, alkali washing, and so on. Chemicalbook crude nitrotoluene contains o-nitrotoluene, p-nitrotoluene and m-nitrotoluene. The crude nitrotoluene is distilled in vacuum, most of the o-nitrotoluene is separated, the residual fraction containing more p-nitrotoluene is separated by vacuum distillation, and the p-nitrotoluene is obtained by cooling and crystallization, and the meta-nitrobenzene is obtained by distillation after accumulation in the mother liquor during the separation of the para.
galvanized drum 200kg/drum; Packing according to customer's requirements. Cool and ventilated, away from fire, heat source, prevent direct sunlight, avoid light.
