Shandong Chenyi Environmental Protection Technology Co.,Ltd
Model No.: cy122-80-5
Place of Origin: China
Supply Ability: 10
HS Code: 2924299090
4 '- Aminoacetanilide
Chinese alias: N - (4-aminophenyl) acetamide; N-acetyl-1,4-phenylenediamine; 4-acetamido-aniline; N-acetyl-p-phenylenediamine; p-aminophenylacetamide;
English Name: 4'-Aminoacetanilide
English aliases: 4'-Aminoacetanilide; 4-Acetamidoaniline; N-Acetyl-p-phenylenediamine; N-(4-aminophenyl) acetamide; N-Acetyl-1,4-phenylenediamine;
Molecular formula: C8H10N2O
Molecular weight: 150.17800
Exact mass: 150.07900 PSA:55.12000 LogP:1.88140
Appearance and character: pale red brown crystalline powder.
Density: 1.203 g/cm3
Melting point: 164-167 °C (lit.)
Boiling point: 267 °C
Flash point: 195 °C
Refractive index: 1.52
Water solubility: 0.1-1 g/100 mL at 25 °C
Stability: Stable for 3 yr at 25 C and for 6 months at 37 C. Reasonable stable in acidic and neutral conditions, but rapidly hydrolyzed in alkaline media (ph 9). Tested stable in storages 5-50 °C.
Storage conditions: warehouse ventilation, low temperature drying, separate storage and transportation with raw materials: steam pressure: 0.008mmHg at 25 degrees C
Customs Code: 2924299090
Danger category code: R36
Safety instructions: S22-S26-S36/37-S39
Dangerous goods sign: Xi
Production methods and uses
P-nitroacetanilide was produced by nitration of acetanilide from desuperheated water (acetanilide) with mixed acid, and then reduced to p-aminoacetylanilide with iron powder. The product was obtained by neutralization, crystallization and drying of the reaction solution.
1. Nitrification in the kettle with concentrated sulfuric acid (98%) 675 kg, stirring, 20-25 C in 2-2.5 h to add acetanilide (99%) 225 kg, plus, to make it fully soluble. The temperature is reduced to 7 degrees centigrade at 4-7 20h, and the mixture is mixed with 63kg (60kg98% water, 60kg98% sulfuric acid and 107kg96% nitric acid). Add and dilute in 4000L ice water and 1H. The upper layer of waste acid is siphon separated, the lower layer material is filtered, and the p-nitroacetanilide is obtained from washing to neutral.
2. Reduction in the reduction barrel with 700 kg water, stirring, adding iron powder 110 kg and acetic acid (98%) 4 kg, heating to 80, 2-2.5 kg in the addition of the above half nitro compounds, temperature control in 72-75. Add heat, 1H and 1H. The upper liquid was inhaled into a neutralizing kettle and neutralized with soda ash (about 4 kg) at 70-75 C until pH=8. A small amount of alkali sulfide was added to remove iron ions. Static 1H, the upper clear liquid into the scraper crystal tank, cold to 18 degrees Celsius. After centrifugation and drying, the yield of p-aminophenylaniline is about 200kg, and the total yield is 80%. P-aminoacetylaniline can also be produced from p-nitroaniline, mixed with acetic acid and acetic anhydride and stirred, heated for 4-5 hours, added water to filter out crystallization, water washing, filtration; then washed p-nitroacetaniline with water, iron powder and acetic acid, heated and stirred for 4 hours, decolorized, filtered to remove iron oxide, filtered out cold crystallization, filtered, and recrystallized with ethanol. Crystal is the product. Raw material consumption quota: acetanilide (98%) 1210kg/t, sulfuric acid (98%) 4000kg/t, nitric acid (95%) 577kg/t.
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