© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Chemical Name: Diisononyl Phthalate
Common Synonyms: DINP, Phthalic acid, diisononyl ester
Molecular Formula: C26H42O4
Primary Use: Plasticizer in PVC products
Appearance: Oily, colorless to pale yellow liquid
Odor: Faint
CAS Number: 28553-12-0
Category: Classified as a substance that can irritate the skin and eyes on direct contact
Acute Risks: Prolonged or repeated skin exposure may cause mild irritation, redness, or dermatitis
Chronic Exposure: Possible liver effects observed in animal studies, raising concerns about long-term handling
Regulatory Listings: Various agencies, including California Proposition 65, flag it for potential reproductive toxicity based on animal research
Routes of Entry: Inhalation (when heated), skin contact, accidental ingestion
Main Ingredient: Diisononyl Phthalate, concentration above 98%
Impurities: Trace quantities of phthalic acid esters and minor residuals from synthesis, composition varies by manufacturer
Additives: Not typically present unless mixed in finished plastic products
Eye Contact: Rinse thoroughly with clean water for at least 15 minutes, keeping eyelids open
Skin Contact: Remove any contaminated clothing, wash skin with mild soap and running water
Inhalation: Move to fresh air, seek medical attention only if symptoms like dizziness or coughing persist
Ingestion: Seek medical attention rather than induce vomiting, especially for large quantities
Symptoms to Watch: Eye redness, mild skin irritation, possible nausea
Flammability: Diisononyl Phthalate does not ignite easily, but can burn if exposed to significant heat
Suitable Extinguishing Media: Use foam, dry chemical powder, or carbon dioxide; avoid water streams which may spread the material
Hazardous Combustion Products: Burning releases carbon monoxide, carbon dioxide, and possibly small amounts of phthalic anhydride
Firefighter Protection: Full protective gear, including self-contained breathing apparatus for smoke exposure
Personal Precautions: Avoid direct skin or eye contact, ventilate the affected area
Spill Cleanup Procedure: Absorb spilled liquid with sand, earth, or a non-combustible absorbent, then collect in containers for proper disposal
Environmental Controls: Prevent spillage from reaching drains or waterways to limit environmental contamination
Disposal Materials: Dispose cleanup materials as hazardous waste according to local rules
Handling: Only work with Diisononyl Phthalate in well-ventilated locations, using gloves to limit skin exposure
Storage Requirements: Store in tightly sealed containers, away from direct sunlight, strong oxidizers and sources of heat
Storage Temperature: Ambient; avoid extremes that might degrade the material
Transfer Precautions: Use non-sparking tools and keep containers grounded during movement to prevent static ignition
Engineering Controls: Maintain good local exhaust ventilation especially where heated processing occurs
Respiratory Protection: Not needed for routine handling at room temperature; a mask required during hot processing or if vapor may form
Skin Protection: Chemical-resistant gloves, long-sleeved protective clothing
Eye Protection: Safety goggles
Work Practices: Wash hands after handling, do not eat or drink in work area
State: Oily liquid
Color: Clear to pale yellow
Odor: Faint
Boiling Point: About 400°C
Melting Point: Less than -50°C
Vapor Pressure: Very low at room temperature
Solubility: Virtually insoluble in water; dissolves in common organic solvents
Density: About 0.97–0.98 g/cm³
Viscosity: Medium-high, depending on temperature
Chemical Stability: Remains stable at standard temperatures and pressures
Reactive Hazards: Not reactive under ordinary storage and use, but reacts with strong oxidizing agents
Decomposition: Produces irritating vapors or gases at high temperatures
Polymerization Risk: None reported
Acute Toxicity: Low oral and dermal toxicity by most accepted animal studies
Eye/Skin Irritation: Mild, transient irritation can occur with prolonged exposure
Chronic Effects: Extended animal tests have indicated changes in liver weight and some reproductive effects; humans are not conclusively affected, but concern exists
Carcinogenicity: Not listed as carcinogenic by IARC or EPA; subject to more stringent regulation in certain regions due to reproductive effect data
Persistence: Breaks down slowly in soil and aquatic environments, raising concern about accumulation
Aquatic Toxicity: Harmful to aquatic organisms, particularly in high concentrations
Bioaccumulation: Measurable accumulation in aquatic species based on laboratory tests
Mobility: Low volatilization and water solubility mean it tends to remain in sediments
Recommended Disposal: Send unused or contaminated material to a licensed chemical waste facility
Environmental Precautions: Avoid landfilling and direct discharge into water sources
Container Disposal: Empty containers retain product residue and must be treated as hazardous
Legal Requirements: Follow local and national laws for hazardous waste
UN Number: Not classified as hazardous for most transport regulations
Hazard Class: Generally ships as non-dangerous goods but regulations may vary
Packing Group: None assigned for typical shipping
Transport Precautions: Secure containers, prevent leaks during handling
Global Registers: Listed on key chemical inventories in the U.S., EU, Japan, Canada, and Australia
Restrictions: Regulated for use in children's toys and products in various jurisdictions due to concerns about health effects
Mandatory Labeling: Certain regions require clear labeling for products containing this substance
Community Right-to-Know: Listed for reporting under several national chemicals reporting programs
