Material Safety Data Sheet – Dimethyl 3,3'-Thiodipropionate

Identification

Substance Name: Dimethyl 3,3'-Thiodipropionate
Chemical Formula: C8H14O4S
CAS Number: 123-28-4
Common Names: DMTP, Dimethyl Thiodipropionate
Manufacturer: Refer to supplier shipping label
Intended Use: Additive in plastics, antioxidant in polymer production
Emergency Contact Phone: Refer to product label

Hazard Identification

Hazard Classification: Eye irritation, Skin irritation
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, causes skin irritation, may cause respiratory irritation
Pictogram: Exclamation mark
Precautionary Statements: Wash thoroughly after handling, avoid breathing dust or vapor, use only outdoors or in a well-ventilated area, wear protective gloves and eye protection
Other Hazards: May produce hazardous decomposition products if burned, combustion can produce irritating and toxic fumes including sulfur oxides

Composition / Information on Ingredients

Chemical Name: Dimethyl 3,3'-Thiodipropionate
Synonyms: Dimethyl thiodipropionate
Content: >99% by weight
Impurities: Trace amounts of reaction byproducts, typically less than 1%
Molecular Weight: 206.26 g/mol

First Aid Measures

General Advice: Move away from exposure source, seek medical attention if discomfort or symptoms persist
Inhalation: Move to fresh air, keep at rest, seek medical advice if symptoms like coughing or shortness of breath occur
Skin Contact: Remove contaminated clothing, wash with soap and water for several minutes; seek medical care if irritation develops
Eye Contact: Rinse eyes with plenty of water for at least 15 minutes, keep eyelids open, remove contact lenses if present, consult a physician if irritation continues
Ingestion: Rinse mouth, do not induce vomiting; provide water to drink, seek immediate medical attention

Fire-Fighting Measures

Suitable Extinguishing Media: Foam, dry chemical powder, carbon dioxide, water spray
Unsuitable Extinguishing Media: Direct water jets
Hazardous Combustion Products: Sulfur oxides, carbon monoxide, carbon dioxide, irritating fumes
Advice for Firefighters: Wear full protective equipment including self-contained breathing apparatus, use water spray to cool containers exposed to flames
Special Procedures: Prevent runoff from fire control from entering drains or waterways

Accidental Release Measures

Personal Precautions: Ventilate area, keep unnecessary personnel away, avoid dust formation, avoid contact with eyes and skin
Environmental Precautions: Prevent entry into watercourses, sewer, or confined areas
Cleanup Methods: Collect material mechanically, sweep up or scoop, place in a labeled container for disposal, wash area with detergent and water after cleanup, ventilate area
Protective Equipment: Gloves, goggles, dust mask or respirator recommended during cleanup

Handling and Storage

Handling: Avoid breathing dust or vapor, avoid eye and skin contact, use only in well-ventilated areas, do not eat, drink, or smoke during handling, wash hands thoroughly after handling
Storage: Store in tightly closed containers, keep in a cool, dry, well-ventilated place, keep away from direct sunlight, incompatible materials include strong oxidizers and acids, limit access to authorized personnel only
Packaging Materials: Use original container, properly labeled

Exposure Controls and Personal Protection

Occupational Exposure Limits: No established limit for this compound; follow general dust exposure guidelines
Engineering Controls: Use local exhaust ventilation or process enclosures to minimize airborne exposure
Personal Protective Equipment: Eye protection (safety goggles), gloves (nitrile or neoprene), protective clothing, dust mask or respirator in situations with inadequate ventilation
Hygiene Measures: Do not eat, drink, or smoke while using the product, wash hands and face before breaks and after handling chemicals, remove contaminated clothing and wash before reuse

Physical and Chemical Properties

Appearance: White to off-white crystalline powder
Odor: Mild, faintly sulfurous
Odor Threshold: Not available
Melting Point: 61-65 °C (142-149 °F)
Boiling Point: 217-220 °C (423-428 °F) at 13 mmHg
Flash Point: >110 °C (closed cup)
Evaporation Rate: Not determined
Flammability: Not classified as flammable
Vapor Pressure: Very low at 20 °C
Solubility: Slightly soluble in water, soluble in most organic solvents
Partition Coefficient (log Kow): 1.31
pH: Not relevant (solid material)
Auto-ignition Temperature: Not determined
Decomposition Temperature: >200 °C
Viscosity: Not applicable (solid)

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions
Reactivity: No dangerous reactions known under normal conditions
Conditions to Avoid: Excessive heat, open flames, incompatible materials
Incompatible Materials: Strong acids, strong oxidizers
Hazardous Decomposition Products: Burning or decomposition can produce toxic fumes including sulfur oxides and carbon oxides, methyl compounds
Polymerization: Will not occur

Toxicological Information

Acute Toxicity: Low toxicity, Oral LD50 (rat) estimated > 2000 mg/kg
Skin Corrosion/Irritation: Mild irritant
Serious Eye Damage/Irritation: Causes irritation
Respiratory or Skin Sensitization: Not classified as a sensitizer
Germ Cell Mutagenicity: No available data
Carcinogenicity: No classification based on available data
Reproductive Toxicity: No classification based on available data
Specific Target Organ Toxicity (Single Exposure): May cause respiratory irritation
Specific Target Organ Toxicity (Repeated Exposure): No evidence of organ-specific toxicity
Aspiration Hazard: Not classified

Ecological Information

Toxicity to Aquatic Life: Not acutely toxic to aquatic organisms based on available data
Persistence and Degradability: Not readily biodegradable under standard test conditions
Bioaccumulative Potential: Low potential for bioaccumulation (log Kow 1.31)
Mobility in Soil: Moderate mobility predicted; slight water solubility
Other Adverse Effects: Avoid uncontrolled release to the environment

Disposal Considerations

Waste Treatment Methods: Dispose of by incineration in accordance with local regulations
Container Disposal: Empty containers should be rinsed and disposed of as hazardous waste
Special Precautions: Do not flush to surface water or sanitary sewer, comply with federal, state, and local disposal regulations
Recommended Disposal: Consult with an approved waste disposal facility or environmental authority

Transport Information

UN Number: Not regulated
UN Proper Shipping Name: Not classified as hazardous for transport
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Environmental Hazards: Not a marine pollutant
Transport Precautions: Avoid extreme temperatures during transport, keep containers securely closed and upright

Regulatory Information

OSHA Status: Not listed as a hazardous substance under OSHA
TSCA (United States): Listed
DSL (Canada): Listed
REACH (EU): Registered substance
SARA Title III: Not subject to reporting
California Proposition 65: Not listed
International Inventories: Listed on chemical inventories in major jurisdictions
Other Regulations: Ensure compliance with all national and local regulations regarding chemical safety, labeling, and reporting