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Chloramine B
1. Basic Information
Name: Chloramine B
Alias: Sodium N-chlorobenzenesulfonamide, Benzenesulfonchloramide sodium salt
CAS No.: 127-52-6
Molecular Formula: C6H5ClNNaO2S
Molecular Weight: 213.61
Category: Chlorinated sulfonamide disinfectant, organic chlorine oxidizing reagent, fine chemical biocide
2. Physical and Chemical Properties
Physical Properties
- Appearance: White crystalline powder
- Odor: Slight pungent chlorine odor
- Solubility: Freely soluble in water; soluble in ethanol, methanol; insoluble in ether, benzene, petroleum ether
- Melting Point: Decomposes above 160 ℃
- Density (predicted): 1.48 g/cm3
- Hygroscopy: Strongly hygroscopic, absorbs water rapidly in humid air
- Aqueous property: Alkaline aqueous solution, releases active chlorine slowly in neutral/weak acidic environment
Chemical Properties
- Molecular structure: Sodium salt of N-chlorobenzenesulfonamide, contains active N-Cl functional group with oxidizing and bactericidal activity
- Active chlorine release: Hydrolyzes in water to generate hypochlorous acid, achieves disinfection and oxidation effects
- Oxidation characteristic: Strong oxidizing property; can oxidize alcohols, amines, sulfides, inorganic reducing ions
- Thermal stability: Unstable at high temperature; heating triggers decomposition, releases chlorine gas and toxic sulfide fumes
- Photostability: Highly light-sensitive, UV irradiation accelerates decomposition and loss of active chlorine
- Compatibility: Compatible with neutral water and weak alkaline medium; strictly incompatible with strong acid, reducing agents, ammonia, ammonium salts
3. Main Application Fields
1. Disinfectant & Biocide (Core Application)
Surface disinfectant for medical equipment, food processing workshops, swimming pools, water treatment; broad-spectrum sterilization against bacteria, fungi, viruses
2. Organic Synthetic Oxidant
Selective chlorination and oxidation reagent for laboratory fine synthesis, preparation of chlorinated intermediates
3. Analytical Chemistry Reagent
Titration reagent for quantitative detection of reducing substances in water samples
4. Textile Auxiliary
Bleaching and antibacterial finishing agent for cotton and blended fabrics
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 127-52-6 |
| Molecular Formula | C6H5ClNNaO2S |
| Appearance | Uniform white crystal without yellow discoloration |
| Active Chlorine Content | ≥24.0% |
| Water Content (KF) | ≤0.50% |
| Residue on Ignition | 32.0% ~ 36.0% |
| Heavy Metals (Pb) | ≤10 ppm |
| Packaging | 100g/1kg plastic bottle, 25kg PE lined plastic drum |
| Storage Condition | Hermetically sealed cool dry warehouse below 25 ℃, full light shielding, isolate acid, reducing agents and ammonia products |
| Transportation Requirement | Hygroscopic oxidizing solid powder, fully sealed moisture-proof packaging, separate from acidic chemicals |
| Shelf Life | 12 months under nitrogen sealed storage |
Safety Warning
Corrosive oxidizing crystalline powder with chlorine irritation hazard. Dust irritates eyes, respiratory tract and skin; contact with acid releases toxic chlorine gas which damages respiratory mucosa. All operations must be carried out in fully ventilated fume hood with dust-proof respirator, splash-proof goggles and heavy chemical-resistant nitrile gloves. Never mix with acid, ammonium fertilizer or reducing chemicals to avoid toxic gas release and exothermic reaction. Waste liquid diluted with plenty of water before neutralization treatment; solid waste classified as hazardous oxidizing chemical waste disposed by licensed professional institutions.
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