© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Common Name: Diisooctyl Phosphate
Chemical Classification: Organic phosphate ester
Synonyms in use: DIOP
CAS Number: 2768-98-7
Physical Form: Clear, oily liquid
Odor: Mild, characteristic
Recommended Use: Industrial applications, plasticizer, sometimes in flame retardants
Hazard Class: Eye irritant, possible skin irritant
Routes of Exposure: Skin, eyes, inhalation, ingestion
Signal Word: Warning
Hazard Statements: Causes moderate eye irritation, may cause mild skin irritation, inhalation in industrial settings may trigger mild respiratory discomfort
Precautionary Statements: Wear protective gloves and eye protection during handling, avoid breathing vapor or mist, wash hands thoroughly after use
GHS Label Elements: Exclamation mark pictogram
Potential Health Effects: No evidence for major long-term health risks at workplace exposure levels, persistent contact increases risk of dermatitis
Chemical Ingredient: Diisooctyl phosphate
Chemical Purity: Typically above 96%
Impurities: Mixed isomers may be present in trace amounts
Physical Mixture: Usually supplied as pure or blend with related esters
Inhalation: Move affected person to fresh air, monitor for breathing difficulties, seek medical care if symptoms do not resolve
Skin Contact: Immediately rinse with soap and water, remove contaminated clothing, seek medical attention for persistent irritation
Eye Contact: Flush gently with plenty of water for at least 15 minutes, lift upper and lower eyelids occasionally, get medical assessment if discomfort continues
Ingestion: Rinse mouth, do not induce vomiting, consult medical help especially in cases of large ingestion
Notes: There are currently no specific antidotes, treatment supports symptoms; severe exposure is rare in occupational settings
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam, water spray for larger fires
Specific Hazards: May emit irritating fumes and phosphorus oxides when burned
Protective Equipment for Firefighters: Full protective gear and self-contained breathing apparatus required when tackling significant fires
Advice: Avoid direct inhalation of smoke, cool storage containers with water spray from a safe distance
Personal Precautions: Use chemical-resistant gloves and safety goggles, ventilate enclosed areas, prevent skin and eye contact
Spill Response: Contain spill with inert absorbent like sand or vermiculite, collect using non-sparking tools, place in sealed chemical waste container
Environmental Precautions: Prevent runoff into sewers or surface waters; although not highly toxic, release to the environment should be minimized
Cleanup: Wash spill area with soap and water after bulk removal
Handling: Use in well-ventilated areas, wear suitable protective gear, avoid creating mist or aerosol
Hygiene Practices: Prohibit eating, drinking, or smoking in handling areas, wash thoroughly before breaks and end of shift
Storage: Store in original chemical containers, cool and dry conditions, direct sunlight and excess heat accelerate breakdown
Incompatibilities: Strong acids, strong bases, oxidizers can react vigorously; avoid contact with incompatible materials
Engineering Controls: Local exhaust or general ventilation helps minimize inhalation; closed transfer systems limit personal exposure
Eye Protection: Chemical splash goggles
Skin Protection: Chemical-resistant gloves (nitrile, neoprene), long-sleeved protective clothing
Respiratory Protection: If ventilation is inadequate or mists are generated, use approved respirator
Workplace Exposure Limits: No specific occupational exposure limit established for diisooctyl phosphate; good industrial hygiene practices recommend minimizing any unnecessary exposure
Physical State: Oily liquid
Appearance: Clear, colorless to pale yellow
Odor: Mild, non-offensive
Boiling Point: Starts around 200°C
Melting Point: Typically below room temperature
Solubility: Insoluble in water, soluble in organic solvents
Vapor Pressure: Very low at normal temperatures
Flash Point: Exceeds 170°C (closed cup)
Viscosity: Noticeably viscous
Density: Slightly less than water
Chemical Stability: Stable at standard temperatures for storage and handling
Hazardous Polymerization: Not known to polymerize under normal conditions
Hazardous Decomposition Products: Thermal breakdown may produce irritating phosphorus oxides and carbon compounds
Conditions to Avoid: High heat, ignition sources, incompatible chemicals
Reactivity: Can react with strong acids and bases, leading to possible breakdown or hazardous releases
Acute Toxicity: Oral and dermal exposures generally result in low toxicity
Skin Irritation: Mild or moderate skin irritant with prolonged or repeated contact
Eye Effects: May cause moderate irritation and discomfort
Sensitization: Not reported as a skin sensitizer in occupational exposure
Chronic Toxicity: Long-term effects in humans are not well studied, but available evidence points to broad safety if workplace hygiene limits are observed
Carcinogenicity: Not classified as carcinogenic by major health agencies
Mutagenicity: No evidence found in standard industry testing
Aquatic Toxicity: Low to moderate toxicity in aquatic species in acute testing; breakdown products less documented
Persistence and Degradability: Organic phosphate esters may degrade slowly in the environment; under certain conditions, residues may persist
Bioaccumulation: Limited data suggest low potential for bioaccumulation in aquatic environments
Soil Impact: Low mobility predicted due to hydrophobic quality, unlikely to contaminate groundwater under typical spill conditions
Waste Disposal: Collect and transfer to approved chemical waste facility, never dispose in general waste or sewer
Recommended Methods: Incineration with proper emission controls, or landfill at facilities equipped to treat organophosphate wastes
Container Disposal: Triple rinse containers before recycling or disposal, follow all local guidelines
Transportation Class: Not regulated for transport under most road, rail, sea, and air codes due to low acute hazard
Packaging: Use chemical-resistant, sealed containers
Precautionary Transport Measures: Protect from heat, secure drums and totes to prevent leaks or overturning
Transport in Bulk: Not commonly shipped in bulk due to specialty industrial application
Regional Regulations: Use and handling may fall under local workplace safety and environmental protection laws
Hazard Labeling: Eye and skin irritant warnings required in many jurisdictions
Occupational Exposure: Employers expected to adopt best industrial hygiene standards regardless of specific listing
Environmental: Spills may require notification to local authorities if thresholds exceeded, especially if near waterways
