Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: 4,4'-Diaminodiphenylsulfone
Alias: DDS, Dapsone, 4,4'-Sulfonyldianiline
CAS No.: 80-08-0
Molecular Formula: C12H12N2O2S
Molecular Weight: 248.30
2. Physical and Chemical Properties
Physical Properties
- Appearance: White or off-white crystalline powder
- Odor: Odorless, slight bitter taste
- Solubility: Slightly soluble in cold water, soluble in hot water, ethanol, methanol, acetone; insoluble in benzene, petroleum ether
- Melting Point: 175–177 °C
- Hygroscopicity: Non-hygroscopic under normal ambient humidity
- Crystal form: Flaky crystals recrystallized from ethanol-water mixed solvent
Chemical Properties
- Molecular structure: Two aniline rings linked by sulfonyl group (-SO2-), containing two aromatic primary amino groups
- Amino reactivity: Amino groups can undergo diazotization, coupling, acylation, polymerization reactions
- Acid-base property: Weak alkalinity, forms soluble salts with mineral acids
- Oxidation resistance: Sulfonyl group has strong electron-withdrawing effect, good anti-oxidation performance compared with common aromatic diamines
- Thermal stability: Stable below 150 °C; above melting point slow decomposition, release sulfur-containing impurities
- Photostability: Stable under indoor light; long-term strong UV irradiation slightly yellowed
- Compatibility: Compatible with most polar organic solvents and epoxy resin monomers; incompatible with strong oxidants, heavy metal salts
3. Main Application Fields
1. High-Performance Polymer Curing Agent (Core Application)
- Curing agent for heat-resistant epoxy resin, widely used in aerospace, electronic insulation composite materials
- Monomer for synthesis of high-temperature resistant polyimide, polysulfonamide engineering plastics
2. Pharmaceutical API Raw Material
- Antibacterial API for treating leprosy, dermatitis and pneumocystis pneumonia
- Raw material for external anti-inflammatory and antibacterial dermatological preparations
3. Dye & Pigment Intermediate
Key raw material for manufacturing reactive dyes, direct dyes and high fastness azo colorants
4. Biochemical & Analytical Reagent
HPLC reference standard for sulfone aromatic amine detection; microbial bacteriostatic test reagent
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 80-08-0 |
| Molecular Formula | C12H12N2O2S |
| Molecular Weight | 248.30 |
| Appearance | White crystalline powder |
| HPLC Purity | Polymer Grade ≥99.0%; Pharma Grade ≥99.5% |
| Water Content (KF) | ≤0.30% |
| Residue on Ignition | ≤0.10% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | 25kg PE lined fiber drum, nitrogen-filled aluminum foil inner bag |
| Storage Condition | Hermetic dry warehouse below 25 °C; isolate oxidants and strong light |
| Transportation Requirement | Aromatic diamine solid, dust-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
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