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.
3,6-DICHLORO-1,2-BENZENEDITHIOL
1. Basic Information
Name: 3,6-Dichloro-1,2-benzenedithiol
Alias: 3,6-Dichloro-1,2-dimercaptobenzene
CAS No.: 87314-49-6
Molecular Formula: C6H4Cl2S2
Molecular Weight: 211.13
Category: Aromatic sulfur-containing organic intermediate, metal chelating reagent, fine chemical raw material
2. Physical and Chemical Properties
Physical Properties
- Appearance: Light yellow to off-white crystalline powder
- Odor: Typical pungent thiol sulfur odor
- Solubility: Slightly soluble in water; soluble in ethanol, acetone, chloroform, toluene; insoluble in aliphatic alkanes
- Melting Point: 72–75 ℃
- Density (predicted): 1.52 g/cm3
- Hygroscopy: Slightly hygroscopic under high humidity
- Aqueous property: Weakly acidic thiol groups, stable in neutral and weak acidic aqueous medium
Chemical Properties
- Molecular structure: Benzene ring substituted with two chlorine atoms and two adjacent sulfhydryl (-SH) groups
- Thiol oxidation: Two sulfhydryl groups are easily oxidized by air to form disulfide dimers, deepening powder color
- Metal chelation: -SH groups form stable insoluble complexes with heavy metal ions (Cu, Pb, Hg, Cd), used for metal capture
- Aromatic substitution: Chlorine substituents can participate in cross-coupling reactions for heterocyclic & polymer synthesis
- Thermal stability: Stable below 60 ℃; long-term heating accelerates oxidation and sublimation
- Photostability: Highly light-sensitive, UV irradiation accelerates oxidative discoloration
- Compatibility: Compatible with anhydrous polar organic solvents; incompatible with strong oxidants, heavy metal salts, strong alkaline substances
3. Main Application Fields
1. Heavy Metal Chelating Capture Agent (Core Application)
Industrial wastewater heavy metal treatment reagent, removes mercury, copper, lead, cadmium ions from electroplating, mining waste water
2. Fine Organic Synthetic Intermediate
Raw material for sulfur-containing heterocyclic compounds, conductive polymer monomers, rubber vulcanization auxiliaries
3. Analytical Chemistry Reagent
Colorimetric detection reagent for trace heavy metal ion qualitative & quantitative analysis
4. Electronic Material Auxiliary
Surface passivation agent for circuit board metal copper coating, anti-tarnish additive
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 87314-49-6 |
| Molecular Formula | C6H4Cl2S2 |
| Appearance | Off-white to pale yellow uniform crystal without brown oxidized impurities |
| HPLC Purity | Industrial/Reagent Grade ≥98.0% |
| Melting Point | 72–75 ℃ |
| Water Content (KF) | ≤0.20% |
| Residue on Ignition | ≤0.10% |
| Single Maximum Unknown Impurity | ≤0.10% |
| Heavy Metals (Pb) | ≤10 ppm |
| Packaging | 10g/100g vacuum aluminum foil bag, 25kg light-proof PE lined fiber drum |
| Storage Condition | Hermetically sealed cool dry warehouse 2–8 ℃, full light shielding, isolate air, oxidants and alkaline raw materials |
| Transportation Requirement | Light-sensitive sulfur-containing aromatic solid powder, sealed anti-oxidation & moisture-proof packaging |
| Shelf Life | 24 months under nitrogen vacuum sealed low-temperature storage |
Safety Warning
Toxic irritant sulfur-containing crystalline powder with strong pungent odor. Dust irritates eyes, nasal tract and respiratory tract; skin contact causes itching and mild corrosive irritation. All operations must be carried out in ventilated fume hood with dust-proof respirator and thick nitrile chemical-resistant gloves. Strictly avoid mixing with strong oxidants to prevent exothermic oxidation reaction. Waste solid & waste liquid shall be fully neutralized and precipitated before discharge; residual materials classified as halogenated sulfur-containing hazardous waste disposed by licensed professional institutions.
