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Common name: Dimethyl Phthalate
Chemical formula: C10H10O4
Synonyms: DMP, Phthalic acid dimethyl ester
CAS Number: 131-11-3
Color: Usually colorless
Odor: Slight, sweet
Physical state: Liquid at room temperature
Uses: Insect repellent, plastics plasticizer, and solvent in a variety of industrial and consumer products
Classification: Often listed as hazardous mainly due to potential for moderate eye and skin irritation
Health concerns: Prolonged or repeated contact may lead to irritation
Routes of exposure: Inhalation, ingestion, skin or eye contact
Chronic exposure: Animal studies point toward possible liver or reproductive system effects
Environmental impact: Identified as an organic contaminant, not acutely toxic but persistent in the environment
Pictogram: Classic exclamation mark for irritant chemicals
Signal word: Warning, to flag attention for workers and handlers
Main component: Dimethyl Phthalate
Concentration: Often present at levels exceeding 99% in commercial samples
Impurities: May include trace phthalate impurities, but usually at very low levels in high-purity chemicals
Eye contact: Rinse immediately with water for several minutes; seek medical advice for any lingering irritation
Skin contact: Remove contaminated clothing, wash skin thoroughly with soap and water
Inhalation: Move person to fresh air, keep comfortable and warm; get medical attention if symptoms continue
Ingestion: Rinse mouth, do not induce vomiting unless directed by a medical professional
Medical attention: Needed for symptoms like persistent coughing, skin rash, or eye irritation
Suitable agents: Foam, dry chemical, carbon dioxide, or water spray
Hazards: May release toxic vapors such as carbon oxides if involved in fire
Protective equipment: Firefighters need self-contained breathing apparatus and full protective gear
Explosion risk: DMP is not strongly flammable but vapors may form explosive mixtures with air
Special considerations: Runoff from firefighting can pollute waterways, so contain spills
Personal protection: Wear gloves, safety goggles, and protective clothing
Ventilation: Increase airflow to disperse possible vapors
Spill containment: Absorb with sand, earth, or suitable inert material, then place in a chemical waste container
Cleanup: Avoid discharge to the environment
Decontamination: Wash spill site after material pickup is complete
Storage: Keep in tightly closed containers, store in a dry, cool, well-ventilated area
Handling: Avoid breathing vapor or mist; wear suitable protective gear
Labeling: Clearly label containers to avoid mix-ups
Separation: Store away from strong oxidizing agents and acids
Spill management: Install secondary containment for bulk storage to catch leaks or spills
Engineering controls: Work with local exhaust ventilation to keep exposures below recommended limits
Personal protection: Wear chemical-resistant gloves, safety glasses or goggles, and lab coats or aprons
Respiratory protection: Use a properly fitted respirator if airborne concentrations exceed recommended limits
Hygiene: Wash hands and face after handling, remove contaminated clothing, do not eat or drink near the material
Appearance: Clear, colorless liquid
Odor: Mild, sweet
Boiling point: Around 282°C
Melting point: Near 2°C
Density: Around 1.19 g/cm³
Solubility: Not very soluble in water, but dissolves well in organic solvents like alcohols and ethers
Vapor pressure: Low at room temperature
Flash point: About 146°C
Vapor density: Heavier than air
Evaporation rate: Slower than water
Stability: Fairly stable under normal conditions
Decomposition: Heat or fire may create hazardous byproducts, mostly carbon oxides
Incompatible substances: Strong oxidizers, strong acids
Polymerization: Not expected under normal conditions
Temperature sensitivity: Protect from excessive heat
Acute toxicity: Low toxicity for single exposures, but high levels can irritate mucous membranes
Chronic effects: Some animal studies suggest potential for reproductive effects and mild liver injury after extended exposure
Irritation: Can cause moderate eye, skin, and respiratory tract irritation
Sensitization: Not widely reported, but always a consideration for chemically sensitive individuals
Carcinogenicity: Not classified as cancer-causing by main regulatory agencies such as IARC or NTP
Mutagenicity: No strong evidence from available research
Persistence: DMP does not easily break down and may remain in soil or water for some time
Aquatic toxicity: Not highly toxic to aquatic life at low concentrations, yet can still disturb ecosystems if spilled in bulk
Bioaccumulation: Not expected to concentrate in aquatic organisms to high levels
Mobility: Moves slowly through soil, so spills may linger near the surface
Environmental caution: Dispose responsibly to avoid local pollution or waterway contamination
Waste handling: Collect waste in sealed containers for professional chemical disposal
Disposal method: Preferred method is incineration at approved facilities
Regulations: Abide by local and national hazardous waste laws to prevent environmental emission
Recycling or reusing: Only if purity can be guaranteed and allowed by local rules
Transport classification: Many countries do not classify DMP as highly dangerous for transport, but spill risk still exists
Packaging: Use tightly sealed, clearly labeled containers
Labeling: Comply with road, rail, air, and sea rules about hazardous materials
Handling for transport: Avoid heat and rough handling to prevent leakage
Spill management for transit: Carry absorbent materials in case of leaks
Labeling requirements: Signal words and hazard pictograms under systems like OSHA and GHS
Worker safety: Exposure controls set by agencies such as OSHA, ACGIH, or European regulations
Environmental controls: Rules prevent bulk releases to waterways or landfill
Consumer products: Phthalates have restrictions in toys and child-focused items in many countries because of long-term exposure studies
Reporting obligations: Chemical inventories and workplace safety plans need updating if DMP is handled or stored
