Product Name: Ethanesulfonic Acid Isopropyl Ester
Chemical Formula: C5H12O3S
CAS Number: 4265-27-4
Synonyms: Isopropyl ethanesulfonate, Isopropyl sulfonic acid ethyl ester
Recommended Use: Laboratory chemical, research applications, not intended for food or drug use
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Classification (GHS): Flammable Liquid (Category 3), Acute Toxicity Oral (Category 4), Skin Corrosion/Irritation (Category 2), Serious Eye Damage/Eye Irritation (Category 2A)
Pictogram: Flame, Exclamation Mark
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation.
Precautionary Statements: Keep away from heat, sparks, open flames, and hot surfaces. Avoid breathing vapors or mist. Wash hands thoroughly after handling. Wear protective gloves, protective clothing, and eye protection.
Other Hazards: Vapors may form explosive mixtures with air. Prolonged exposure may cause dizziness or nausea.
Chemical Identity: Ethanesulfonic Acid Isopropyl Ester
CAS Number: 4265-27-4
Concentration: >98%
Impurities/Additives: Water <0.5%, isopropanol <0.2%, other non-classifiable traces
Molecular Weight: 152.21 g/mol
Inhalation: Move person to fresh air. If breathing becomes difficult, give oxygen and call a physician. If not breathing, perform artificial respiration.
Skin Contact: Remove contaminated clothing. Wash skin with plenty of soap and water for 15 minutes. Seek medical attention if irritation persists.
Eye Contact: Rinse cautiously with water for at least 15 minutes, lifting both upper and lower eyelids. Remove contact lenses if present and easy to do. Call medical help.
Ingestion: Rinse mouth with water. Do not induce vomiting. Immediately contact a physician or poison center.
Symptoms: Respiratory tract irritation, dizziness, skin redness, eye pain, abdominal discomfort.
Suitable Extinguishing Media: Dry chemical, CO2, alcohol-resistant foam, or water spray (not jet).
Unsuitable Extinguishing Media: Direct water jet may spread the fire.
Special Protective Equipment: Firefighters wear self-contained breathing apparatus and chemical-protective clothing.
Hazards from Combustion Products: Carbon monoxide, carbon dioxide, sulfur oxides, irritating and toxic fumes.
Specific Hazards: Vapors may form explosive mixtures with air. Containers may rupture on heating.
Advice: Cool fire-exposed drums with water spray from a safe distance.
Personal Precautions: Evacuate area, ventilate space, avoid breathing vapors, wear protective equipment.
Environmental Precautions: Prevent runoff into drains, sewers, or surface waters.
Methods for Cleaning Up: Absorb with inert material (earth, sand). Collect, place in suitable containers for disposal. Ventilate and wash site after collection.
Special Handling: Avoid generating mists or vapors during clean-up.
Handling: Handle in a chemical fume hood. Ground and bond containers when transferring. Use spark-proof tools and explosion-proof equipment. Keep away from heat, flames, and sources of ignition. Avoid contact with eyes, skin, and clothing.
Storage: Store in a tightly closed container. Place in a cool, dry, well-ventilated area away from incompatible materials, strong oxidizers, and strong acids. Protect from direct sunlight.
Separation: Segregate from oxidizers, bases, strong acids, and foods.
Special Cautions: Keep container upright. Check for leaks regularly.
Engineering Controls: Use only in well-ventilated areas, preferably under local exhaust ventilation.
Respiratory Protection: Use NIOSH-approved respiratory protection if exposure limits are exceeded or for emergency procedures.
Eye Protection: Chemical goggles or safety glasses with side shields.
Skin Protection: Nitrile or neoprene gloves, lab coat, impervious apron as necessary.
Body Protection: Protective clothing to minimize skin exposure.
Hygiene Measures: Remove contaminated clothing. Wash hands and face thoroughly after handling.
Appearance: Colorless to light yellow liquid
Odor: Characteristic, sharp, somewhat sweet
Odor Threshold: Not established
pH: Not applicable (non-aqueous liquid)
Melting Point / Freezing Point: -20 °C
Boiling Point: 180-182 °C
Flash Point: 68 °C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable
Vapor Pressure: 0.5 mmHg at 25 °C
Vapor Density: 5.3 (air=1)
Relative Density: 1.16 g/cm³
Solubility: Slightly soluble in water, soluble in most organic solvents
Partition Coefficient (n-octanol/water): log Kow = 0.3
Autoignition Temperature: 295 °C
Decomposition Temperature: >160 °C
Viscosity: 2.06 mPa·s at 25 °C
Chemical Stability: Stable under recommended storage conditions.
Reactivity: Reacts with strong oxidizing agents and strong acids.
Hazardous Reactions: Can react with bases to form salts and water.
Conditions to Avoid: Heat, flames, spark sources, strong sunlight.
Materials to Avoid: Strong oxidizers, bases, acids, reducing agents.
Hazardous Decomposition Products: Sulfur oxides (SOx), carbon monoxide (CO), carbon dioxide (CO2), irritating fumes.
Acute Toxicity: Oral LD50 (rat): 980 mg/kg. Inhalation LC50 (rat): Not available. Dermal LD50 (rabbit): Not available.
Skin Corrosion/Irritation: Causes moderate to severe irritation upon contact.
Serious Eye Damage/Irritation: Causes eye irritation, redness, and watering.
Respiratory Sensitization: May irritate respiratory tract.
Skin Sensitization: Possible skin allergen in sensitive individuals.
Carcinogenicity: No specific data available. Not listed by IARC, NTP, or OSHA.
Mutagenicity: No data found.
Reproductive Toxicity: No relevant studies identified.
Other Effects: Prolonged or repeated exposure may cause organ damage or nervous system effects.
Ecotoxicity: Harmful to aquatic life (estimated EC50 for fish <100 mg/L).
Persistence and Degradability: Not readily biodegradable, moderate persistence in aquatic systems.
Bioaccumulative Potential: Low potential for bioaccumulation (log Kow <1).
Mobility in Soil: Likely to be mobile based on solubility profile.
Other Adverse Effects: Toxic to aquatic organisms with long-lasting effects. Avoid release to environment.
Disposal Methods: Dispose of in accordance with local, regional, and national regulations. Incinerate in approved facilities or contract with licensed chemical disposal firm.
Contaminated Packaging: Empty containers retain product residue; treat as hazardous waste. Do not reuse packaging.
Special Precautions: Do not allow into waterways, sewers, or soil.
UN Number: 3272
Proper Shipping Name: Esters, n.o.s. (Ethanesulfonic acid isopropyl ester)
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: III
Label: Flammable liquid label required.
Environmental Hazards: Not regulated for marine pollutant.
Special Precautions for User: Keep container tightly sealed, use chemical-resistant packaging, comply with all legal requirements while shipping.
OSHA Status: Classified as hazardous under OSHA regulations.
EPA TSCA Status: Listed or accepted under TSCA inventory.
DSL/NDSL (Canada): May be listed. Check Canadian regulations.
REACH (EU): Not registered under EU REACH; check compliance for use in Europe.
SARA Section 313: Substance not regulated at this time.
California Prop 65: Not listed as a carcinogen or reproductive toxicant.
Other: Consult country- and region-specific regulations regarding use, storage, transport, and disposal.
