Product Name: Dioctyl Maleate
Chemical Formula: C20H36O4
CAS Number: 142-16-5
Synonyms: DOM; Bis(2-ethylhexyl) maleate
Recommended Use: Plasticizer and chemical intermediate in adhesives, coatings, and emulsion systems
Supplier: Refer to chemical supplier documentation for direct contact and emergency phone numbers
GHS Classification: Skin irritant (Category 2), Eye irritant (Category 2A), Not classified as acutely toxic
Label Elements: Exclamation mark symbol, warning signal word, hazard and precautionary statements
Hazards: Causes skin and eye irritation, prolonged or repeated contact can trigger dermatitis, vapor may irritate respiratory passages in high concentrations
Acute Exposure Symptoms: Redness, swelling, discomfort on contact areas, watery eyes, coughing
Chronic Effects: Long-term exposure may dry or crack skin
Component: Dioctyl Maleate
Percentage: 99% minimum
Impurities and Stabilizers: Minimal content of related esters and residual maleic acid less than 1%
Hazardous Impurities: Non-significant according to current regulatory thresholds
Inhalation: Provide fresh air, monitor for respiratory symptoms, seek medical attention if symptoms persist
Skin Contact: Wash with soap and water, remove contaminated clothing, rotate clean water over affected areas
Eye Contact: Rinse carefully for at least fifteen minutes under flowing water, consult medical care for persistent irritation
Ingestion: Rinse mouth, never give fluids or induce vomiting if unconscious or convulsing, seek immediate health professional evaluation
Suitable Extinguishing Media: Dry chemical, foam, water spray, carbon dioxide specific to liquid organic fires
Unsuitable Media: High-volume water jets can spread burning product
Hazardous Combustion Products: Releases carbon monoxide, carbon dioxide, potentially acrid smoke or irritating fumes
Protective Equipment: Self-contained breathing apparatus, full protective clothing for significant fires
Special Precautions: Cool exposed closed containers with water mist to prevent vessel rupture or reignition
Personal Precautions: Restrict area, utilize splashproof goggles and resistant gloves, ventilate space
Environmental Precautions: Block spillage from reaching soil, surface water, or drainage networks
Containment: Use inert absorbents like sand or earth, collect for disposal in labeled drums
Cleanup Methods: Sweep up solidified residue, wash affected surfaces with detergent, do not allow rinseate into natural water systems
Handling: Maintain containers securely closed, deploy local exhaust or general ventilation in processing spaces
Avoid Contact With: Skin, eyes, clothing, excess heating that can degrade quality or generate fumes
Storage: Store in cool, dry, well-ventilated place, away from oxidizing agents and direct sunlight
Packaging: Tight-sealed drums or tanks with clear product labeling; use only corrosion-resistant materials
Special Notes: Minimize static discharge by grounding equipment
Engineering Controls: Use local exhaust, mechanical ventilation to keep vapor concentrations below exposure limits
Exposure Limits: No established occupational exposure limit; handle using general chemical safety guidelines
Personal Protective Equipment: Chemical-resistant gloves (nitrile, PVC), splashproof goggles, long sleeves
Respiratory Protection: NIOSH-approved mask for high vapor or mist exposure; not typically required at ambient conditions
Hygiene: Wash hands thoroughly after handling, keep contaminated clothing separate
Appearance: Colorless to pale yellow oily liquid
Odor: Mild, ester-like
Boiling Point: 197°C at 7 mmHg
Melting Point: -67°C
Flash Point: 204°C (closed cup)
Vapor Pressure: 0.06 mmHg at 25°C
Solubility: Slightly soluble in water, miscible with organic solvents
Density: 0.944 g/cm³ at 25°C
Viscosity: 14-17 mPa.s at 25°C
Chemical Stability: Stable under recommended handling and storage conditions
Conditions to Avoid: Excessive heat, moisture, open flame
Materials to Avoid: Strong oxidizers (peroxides, nitric acid), strong acids, strong bases
Hazardous Reactions: No dangerous reactions in ordinary use; thermal decomposition may create hazardous byproducts
Decomposition Products: Carbon monoxide, carbon dioxide, potentially low-molecular organics and irritating fumes
Acute Toxicity: Oral LD50 (rat): > 5000 mg/kg; low acute toxicity
Skin Corrosion/Irritation: Causes moderate irritation with direct contact
Eye Damage/Irritation: Provokes conjunctival irritation
Respiratory Sensitization: No reliable evidence suggests respiratory sensitization
Long-Term Effects: Evidence points toward repeated exposure causing dryness or cracking of skin, not classified as a carcinogen
Other Information: Not shown to cause reproductive harm or genetic mutations in standard tests
Aquatic Toxicity: LC50 (fish, 96-h): > 100 mg/l; low toxicity to aquatic life in standard exposures
Persistence and Degradability: Partially biodegradable, expected to degrade in environment but not instantaneously
Bioaccumulation Potential: Low to moderate; log Kow suggests some tendency to partition into organic phases
Mobility in Soil: Spillages may seep into soils, slow migration due to low water solubility
Other Adverse Effects: Limited impact expected from small releases; bulk discharges may require notification to environmental authorities
Waste Disposal Methods: Dispose of in accordance with national, state, and local regulations, use incineration or licensed chemical landfill
Contaminated Packaging: Empty containers thoroughly, puncture to prevent reuse, recycle or dispose as regulated chemical waste
Special Precautions: Do not allow material to enter ground, water, or sewage systems directly
Disposal Guidance: Seek advice from hazardous waste professional for bulk leftover or spills
UN Number: Not regulated for transport by land, sea, or air
Proper Shipping Name: Not classified as hazardous for shipping
Transport Hazard Class: Non-hazardous
Packing Group: Non-assigned
Transport Precautions: Protect against puncture, keep containers upright and dry during transport, secure loads to avoid shifting
Inventory Status: Listed in TSCA (USA), EINECS (EU), DSL (Canada), and similar international inventories
Regulations: OSHA—General chemical handling standards apply; not listed under CERCLA, SARA, or Proposition 65 for hazardous characteristics
Labeling Requirements: Clear product label with hazard and safety instructions, safety pictogram as needed
Workplace Control: Provide training, maintain accessible MSDS, establish eyewash and emergency shower facilities in handling locations
Other Regulations: Review local rules for air emissions, water discharge, and workplace exposure compliance
