Sodium Dimethyldithiocarbamate

Sodium Dimethyldithiocarbamate (SDD) 40% Solution:

Sodium Dimethyldithiocarbamate (SDD) 40% aqueous solution is an organosulfur heavy metal precipitating agent. It reacts rapidly with divalent and trivalent metal ions across a wide pH range to form stable, insoluble chelate precipitates.
Compared to traditional sulfide precipitation methods, SDD does not generate toxic hydrogen sulfide gas under acidic conditions, minimizing operational safety risks in industrial effluent treatment plants. It is supplied as a clear, amber to pale yellow liquid optimized for direct dosing in continuous flow wastewater systems.

 

Product Specifications:

 

Active Ingredient	Sodium Dimethyldithiocarbamate C3H6NS2Na
CAS Number	128-04-1
EINECS/ELINCS Number	204-876-7
Molecular Formula	C3H6NS2Na
Appearance	Clear, pale yellow to amber liquid
Active Content	>= 40.0%
Free Alkali (NaOH)	<= 0.8%
PH Value (10% solution)	9.0 - 11.0
Density (20 deg C)	1.15 - 1.20 g/cm3

 

Chemical & Physical Properties:
Chelation Kinetics: Precipitates heavy metal ions instantaneously upon contact, achieving residual metal concentrations below 0.1 mg/L in treated effluent.
Thermal Stability: Stable under normal storage and handling temperatures; decomposes above 100 deg C releasing carbon disulfide and dimethylamine.
Compatibility: Miscible with water in all proportions. Incompatible with strong acids, oxidizing agents, and copper alloys.
Crystallization Point: Approximately -5 deg C. Storage below this threshold induces crystallization; warming to room temperature and mechanical agitation fully restores solution homogeneity without active loss.

 

Applications:
Wastewater Treatment: Removes heavy metals (copper, nickel, cadmium, zinc, mercury, lead) from electroplating, printed circuit board (PCB) manufacturing, mining, and metallurgy effluents.
Polymerization Inhibitor: Acts as a chain transfer agent and short-stop in emulsion polymerization processes for synthetic rubber production (SBR, NBR).
Pulp and Paper: Functions as a slimicide and bio-control agent in industrial water circuits.
Chemical Intermediate: Serves as a precursor in rubber vulcanization accelerator manufacturing and agricultural chemical synthesis.

 

Pharmaceutical Manufacturing Relevance:
Process Wastewater Polishing: Utilized in active pharmaceutical ingredient (API) synthesis facilities to remove trace heavy metal catalysts (palladium, platinum, nickel) from process streams prior to discharge into municipal biological treatment systems.
Trace Catalyst Recovery: Prevents downstream bio-inhibition in biological wastewater treatment units caused by residual transition metal catalysts.

 

Grade & Quality Requirements:
Industrial Grade (40% Liquid): Standard formulation for heavy metal wastewater treatment and industrial chemical processing.
Purity Standards: Manufactured via controlled synthesis utilizing high-purity dimethylamine and carbon disulfide, maintaining low heavy metal impurity profiles to prevent secondary contamination.
Regulatory Framework: Manufactured in compliance with standard international chemical management protocols. REACH preregistration/registration status and local import documentation available for European and North American shipments.

 

Quality Control:
Batch Testing: Every production lot undergoes mandatory titration assay for active content, pH determination, density measurement, and free alkali analysis prior to release.
Traceability: Retained samples from each production lot are stored for 12 months in a temperature-controlled archive.
Instrumentation: Analytical verification performed via standard volumetric titration and digital refractometry calibrated against NIST-traceable standards.

 

Technical Documents:
COA (Certificate of Analysis): Representative batch COA available for download or immediate delivery via email inquiry. Includes verified active content, pH, density, and batch-specific manufacturing date.
SDS (Safety Data Sheet): Compliant with GHS standards (OSHA/EU formats available). Details acute toxicity, protective equipment requirements, spill response procedures, and transport classification (UN 3082, Environmentally hazardous substance, liquid, n.o.s.).
TDS (Technical Data Sheet): Comprehensive parameter breakdown, recommended dosing ratios, and storage guidelines.

 

Packaging & Storage:
Packaging Options:
HDPE Drums: 200 kg net weight per drum (800 kg per wooden pallet).
IBC Totes (Intermediate Bulk Container): 1000 kg net weight per UN-approved composite tote.
ISO Tank: Bulk delivery (20-25 MT) for high-volume industrial consumers.
Storage Conditions: Store in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and strong acids.
Shelf Life: 12 months from manufacturing date when stored within recommended temperature ranges (5 deg C to 35 deg C).

 

Supply & Procurement:
MOQ (Minimum Order Quantity): 1 IBC tote (1000 kg) or 4 x 200kg drums for standard ocean freight or full truckload domestic transport.
Sample Policy: 500ml laboratory test samples available for verified industrial buyers and distributors. Freight charges apply.
Lead Time:
Standard stock items: Dispatch within 5-7 business days.
Bulk ISO tank orders: 10-15 business days from contract confirmation.
Bulk Supply Capabilities: Continuous manufacturing capacity supporting multi-container monthly allocation contracts and annual supply agreements.

 

OEM / Custom Specification:
Active Content Adjustments: Available in custom concentrations ranging from 20% to 40% based on specific operational dosing requirements.
Private Labeling: Custom drum stenciling, pallet labeling, and branded documentation available for chemical distributors and formulators meeting minimum volume thresholds.

 

 

Request a Quote:
Submit your required volume, destination port, and packaging preference to receive a commercial quotation including FOB/CIF pricing, shipping schedules, and current batch COA within 24 business hours.

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