Sodium 3-nitrobenzenesulphonate CAS 127-68-4 Information
| CAS |
127-68-4 |
| Molecular formula |
C6H4NNaO5S |
| Molecular weight |
225.15 |
| EIENCS |
204-857-3 |
| Form |
Crystalline Powder |
| Melting point |
350 °C |
| boling point |
217.5°C |
| Density |
0.45 g/cm3 (20 °C) |
| Solubility |
water: soluble50mg/mL, clear to slightly hazy, faintly yellow to yellow |
| PKA |
/ |
| Color |
Light yellow |
| Storage temp |
|
What is Sodium 3-nitrobenzenesulphonate CAS 127-68-4?
Mainstream process: Sulfonation of nitrobenzene - neutralization method
Sulfonation reaction: Nitrobenzene reacts with fuming sulfuric acid (containing 20% SO₃) at 0-5°C, then the temperature is raised to 100°C and held for 2 hours.
Salting out and purification: The reaction solution is diluted with ice water and then salted out with table salt. After filtration, m-nitrobenzenesulfonic acid is obtained.
Neutralization crystallization: Sulfonic acid is neutralized with soda ash, decolorized with activated carbon, and then cooled and crystallized to obtain the finished product.
Raw material consumption: nitrobenzene (390 kg/t), sulfuric acid (550 kg/t), fuming sulfuric acid (410 kg/t).
Sodium 3-nitrobenzenesulphonate CAS 127-68-4 Use
Dye industry
Anti-dye and protective agents: Used in reductive/sulfur dye printing to prevent reductive substances from damaging the dye structure and protect the stability of color light.
Dye intermediates: Synthesis of vanillin and other dyes.
Industrial additives
Electroplating nickel remover: Dissolves nickel layers and is used for the repair of precision parts;
Ship anti-rust agent: Neutralizes the reducing substances on the metal surface and delays corrosion.
Organic synthesis
Mild oxidant: Catalyzes oxidation reactions in drug synthesis;
Catalyst: Promotes the synthesis of carboxylic acid compounds.
Sodium 3-nitrobenzenesulphonate CAS 127-68-4 safety
Health hazard:
It irritates the eyes, skin and respiratory tract. Contact may cause redness, swelling and pain.
Acute toxicity: Oral LD₅₀ > 2000 mg/kg in rats (low acute toxicity).
Environmental risk:
Toxic to aquatic organisms (WGK Germany Grade 1), entry into water bodies needs to be prevented.
Protective measures:
Wear a gas mask, chemical goggles and impermeable gloves when operating.
Leakage treatment: Adsorb with sand or rinse with water to avoid dust.
