Product Name: Dipropylene Glycol Mixture of Isomeric Propylene Glycol Ethers
Chemical Family: Glycol Ethers
CAS Number: 25265-71-8
EC Number: 246-770-3
Synonyms: DPG, Dipropylene glycol monomethyl ether, Propylene glycol derivatives, Mixed isomers
Recommended Use: Solvent in coatings, inks, cleaners, hydraulic fluids, cosmetics, and personal care products
Supplier: Refer to safety and procurement documentation
Emergency Contact: For emergencies, use local or national chemical spill response resources
GHS Classification: Not considered hazardous according to OSHA Hazard Communication Standard. May irritate eyes, skin, and respiratory tract after sustained or heavy exposure.
Signal Word: Warning
Hazard Statements: Causes mild skin and eye irritation. Vapors could cause drowsiness or dizziness at high concentrations. No confirmed carcinogenic, mutagenic, or reproductive toxicity concerns in humans.
Precautionary Statements: Avoid breathing vapor or mist. Use with adequate ventilation. Wash hands thoroughly after use.
Physical Hazards: Slightly combustible. May form peroxides over time. High heat may generate flammable vapors. Not explosive.
Environmental Hazards: Harmful to aquatic life in concentrated spills. Chronic toxicity low.
Chemical: Dipropylene Glycol Monomethyl Ether
Chemical Formula: C7H16O3
Concentration: 95-100% mixed isomeric forms
Impurities: Contains trace dipropylene glycol (less than 2%) and related glycols
Other Components: Residual water, stabilizers less than 1%
CAS Numbers of Isomers: 34590-94-8 (major), 1320-67-8 (minor)
Occupational Exposure Limit Components: Propylene glycol ethers contribute most workplace exposure
Inhalation: Move affected person to fresh air. Provide artificial respiration if breathing has stopped. Obtain medical attention up if symptoms persist such as headache, dizziness, or nausea.
Skin Contact: Wash immediately and thoroughly with soap and water. Remove contaminated clothing. Seek medical attention for persistent irritation, redness, or swelling.
Eye Contact: Rinse eyes with water for at least 15 minutes. Separate eyelids with clean fingers if needed. Remove contact lenses during rinsing. Consult a health professional if discomfort continues.
Ingestion: Rinse mouth. Get medical aid if large amounts are swallowed, do not induce vomiting unless instructed by medical personnel. Never give fluids to an unconscious person.
Most Important Symptoms: Reddening, itching, cough, light-headedness. Prolonged exposures sometimes produce central nervous system effects.
Suitable Extinguishing Media: Water spray, carbon dioxide, alcohol-resistant foam, dry chemical
Unsuitable Extinguishing Media: Direct water jet may spread liquid
Specific Hazards: Burning may generate toxic vapors such as carbon monoxide, carbon dioxide, and aldehydes
Protective Equipment: Firefighters should wear self-contained breathing apparatus and impervious protective clothing
Special Procedures: Cool exposed containers with water spray. Prevent run-off from entering drains or watercourses. Avoid inhalation of combustion byproducts.
Personal Precautions: Restrict access to spill area. Use appropriate protective gear including gloves and goggles.
Environmental Precautions: Prevent further leakage or spillage if safe. Avoid entry into waterways, sewers, or confined spaces.
Methods for Cleaning Up: Stop source of leakage. Absorb with inert materials such as sand or earth. Scoop up material and place in a chemical waste container. Wash area with detergent and water to remove residues. Properly ventilate affected area.
Disposal: See disposal considerations for guidance on proper waste management.
Handling: Handle with care to avoid splashing or inhaling. Use effective local exhaust or general ventilation. Avoid contact with eyes and prolonged skin exposure. Do not eat, drink, or smoke when using this chemical.
Storage Conditions: Store in tightly closed, properly labeled containers. Keep away from combustibles, heat sources, and oxidizing agents. Store in a cool, well-ventilated place. Protect from moisture, sunlight, and extremes in temperature. Regularly inspect for leaks or container degradation.
Incompatible Materials: Strong oxidizers, acids, and bases may cause hazardous reactions.
Permissible Exposure Limits: ACGIH TLV: 100 ppm TWA for propylene glycol monomethyl ether
Engineering Controls: Use good general or local exhaust ventilation to keep airborne levels below recommended limits.
Respiratory Protection: Approved respirator for organic vapors may help during high vapor conditions or cleaning large spills.
Eye Protection: Chemical safety goggles or face shield
Skin Protection: Chemical-resistant gloves, long sleeves, and lab coat or apron
Hygiene Measures: Wash hands before eating or smoking. Remove contaminated clothing promptly.
Appearance: Clear, colorless to pale yellow liquid
Odor: Faint, slightly sweet
Odor Threshold: Difficult to detect until moderate concentration
pH: Not applicable (neutral in water)
Melting Point/Freezing Point: Below -80°C
Boiling Point: 188-235°C depending on isomer composition
Flash Point: 75°C (closed cup, varies by isomer)
Evaporation Rate: Slow
Flammability: May burn at high temperatures, not considered highly flammable
Explosive Limits: 0.84% (lower) - 6.2% (upper) by volume in air
Vapor Pressure: 0.01 - 0.07 kPa at 20°C
Vapor Density: About 4.6 (air = 1)
Relative Density: 1.02 g/cm³
Solubility: Miscible with water and common organic solvents
Partition Coefficient (n-octanol/water): log Kow ~ 0.6
Decomposition Temperature: Above 230°C
Viscosity: 4–7 cP at 25°C
Chemical Stability: Stable under recommended storage and use conditions
Hazardous Reactions: No dangerous reactions known under proper use
Conditions to Avoid: Prolonged exposure to heat, ignition sources, and strong acids/bases
Materials to Avoid: Strong oxidizing agents, strong acids, and alkalis
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, and potentially irritating aldehydes
Polymerization: Does not polymerize under normal conditions
Likely Routes of Exposure: Inhalation, skin, eye, and ingestion
Acute Toxicity: Oral LD50 (rat) > 5000 mg/kg; Dermal LD50 (rabbit) > 9500 mg/kg. Low concern for acute toxicity at normal exposures.
Skin Corrosion/Irritation: Mild, not a strong irritant unless prolonged contact occurs
Eye Damage/Irritation: Slightly irritating, redness or watering can develop
Respiratory Sensitization: Not a known sensitizer
Carcinogenicity: No evidence of carcinogenic effects in animal or human studies
Reproductive Toxicity: No significant effects observed in reproductive studies
Other Effects: High vapor concentrations may depress central nervous system, causing headache or dizziness
Ecotoxicity: Moderately toxic to aquatic life in concentrated spills, with EC50 (Daphnia magna) around 1000-2000 mg/L
Persistence and Degradability: Rapidly biodegradable by standard OECD testing. Not likely to persist in soil or water.
Bioaccumulative Potential: Low, based on log Kow and rapid degradation
Mobility in Soil: High, material migrates through soil and groundwater but degrades quickly
Other Adverse Effects: Avoid bulk discharge to waterways to prevent potential oxygen demand increases or aquatic toxicity
Waste Treatment Methods: Collect and store in sealed containers for recycling or disposal by a licensed chemical waste facility. Do not pour unused chemical down the drain or natural bodies of water.
Contaminated Packaging: Empty containers should be rinsed and disposed per local environmental regulations. Containers may retain product residues and vapors.
Recommended Disposal: Incineration under controlled conditions whenever practical. Small laboratory quantities may be absorbed on vermiculite for Pick-up and chemical incineration.
Regulatory Information for Disposal: Follow all relevant federal, state, and local regulations. Classifications may vary by jurisdiction, best to check current guidance in your region.
UN Number: Not regulated as a dangerous good for land, sea, or air transport in most jurisdictions
Proper Shipping Name: Dipropylene Glycol Ether Mixture
Transport Hazard Class: Not assigned
Packing Group: None required
Special Precautions for User: Use secure containers and avoid transport with incompatible chemicals such as oxidizers or strong acids.
Marine Pollutant: Not classified as a marine pollutant
Other Transport Information: Emergency schedules may still apply if bulk quantities are shipped.
OSHA: Not classified as hazardous per OSHA 29 CFR 1910.1200
TSCA Inventory: Listed
EU REACH: Registered and compliant
Canadian DSL: Included
WHMIS Classification: Not controlled
Other Regulations: Satisfies key requirements under major international inventory programs for use in industrial and consumer products
Label Elements: Ensure containers remain labeled with hazard and safety information throughout lifecycle.
Restrictions: Some regions may place restrictions on use in consumer products—check regulatory updates routinely.
Worker Protection: Regulatory bodies encourage engineering controls and PPE in workplaces where exposure could exceed published limits
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