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Name: Cyclobutyl Chloroformate
Chemical Family: Organic Chloroformates
Other Names: Cyclobutanecarbonyl chloride
Formula: C5H7ClO2
Appearance: Typically a colorless to pale yellow liquid with a pungent, irritating odor.
Classification: Harmful if inhaled or swallowed. Skin and eye contact can cause corrosive burns.
Acute Hazards: Severe respiratory irritation, central nervous system depression, intense skin and eye irritation, chemical pneumonitis.
Chronic Risks: Prolonged exposure stresses the respiratory tract, skin, and eyes.
Flammability: May ignite if exposed to high temperatures or open flames.
Environmental Impact: Dangerous to aquatic life, even in low concentrations.
Component: Cyclobutyl Chloroformate
CAS Number: 50832-81-4
Concentration: Pure substance form in most laboratory and industrial settings.
Other Ingredients: None typically present.
Inhalation: Move to fresh air, keep the person warm and relaxed, seek medical help immediately if symptoms like coughing or difficulty breathing appear.
Skin Contact: Remove contaminated clothing, flush the skin under running water for at least 15 minutes, avoid scrubbing, and obtain medical attention for blisters or persistent irritation.
Eye Contact: Rinse eyes with water for at least 15 minutes, hold eyelids open, avoid rubbing, and consult a doctor promptly.
Ingestion: Rinse the mouth with water if the person is conscious, avoid inducing vomiting, and get emergency medical aid.
Suitable Extinguishing Media: Use carbon dioxide, dry chemical extinguishers, or foam. Water spray cools exposed containers but may spread corrosive runoff.
Hazardous Combustion Products: Hydrogen chloride, phosgene, and carbon monoxide may form under fire conditions.
Special Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear.
Other Considerations: Stay upwind, contain runoff if safe, and avoid inhaling combustion fumes—these often cause more harm than the initial exposure.
Personal Precautions: Evacuate unnecessary personnel from the area, avoid inhaling vapors, keep skin and eyes protected, and ensure maximum ventilation.
Environmental Precautions: Prevent liquid from entering drains and waterways, contain spills using inert absorbents such as sand or vermiculite.
Cleanup Methods: Absorb with suitable materials, scoop up residue, place in corrosion-resistant containers for disposal.
Further Actions: Wash the spill area thoroughly after removal, double-check for residue, report any significant release to proper environmental response teams.
Safe Handling Practices: Use chemical fume hoods, seal containers immediately after use, and keep exposure times short. Avoid contact with skin, eyes, and clothing.
Storage Conditions: Store in a tightly sealed container, in a cool, dry, and well-ventilated area, away from incompatible substances like bases, amines, or strong oxidizers.
Prevention of Accidents: Use secondary containment, secure vessels properly, label all storage clearly.
Transfer Procedures: Employ non-sparking tools and proper grounding for containers.
Engineering Controls: Set up local exhaust ventilation or chemical fume extraction systems to minimize vapor accumulation.
Eye/Face Protection: Chemical splash goggles or face shields give solid defense against splashes.
Skin Protection: Nitrile or neoprene gloves, lab coats, boots, and aprons keep direct contact at bay.
Respiratory Protection: Use air-purifying respirators with organic vapor cartridges if vapors exceed recommended occupational limits.
Hygiene Measures: Wash hands and forearms thoroughly after handling, change out of contaminated clothing immediately.
Form: Liquid
Color: Colorless to slightly yellow
Odor: Sharp, pungent
Boiling Point: 174–177 °C
Melting Point: Below room temperature
Density: Slightly heavier than water
Solubility in Water: Reacts vigorously, forming corrosive hydrochloric acid and carbon dioxide.
Vapor Pressure: Moderate at ambient temperature
Stability: Decomposes rapidly in moisture, best stored dry and cold.
Stability: Unstable in humid air or water, releases toxic gases.
Reactivity: Violent reactions occur with moisture, alcohols, amines, and bases due to rapid hydrolysis.
Hazardous Decomposition: Phosgene, hydrogen chloride, and carbon monoxide release on burning or decomposition.
Incompatibilities: Avoid heat, open flame, and contact with reactive compounds or oxidizers as these kick off dangerous reactions.
Inhalation Effects: Headache, dizziness, coughing, chemical lung injury at higher exposures.
Ingestion Effects: Abdominal pain, nausea, burns to the gastrointestinal tract.
Skin Effects: Corrosive, burns, redness, blisters.
Eye Effects: Severe irritation, burns, potential long-term injury to cornea.
Chronic Exposure Risks: Persistent symptoms like coughing, skin hypersensitivity, and respiratory inflammation.
Target Organs: Lungs, skin, gut lining.
Acute Aquatic Toxicity: Deadly to aquatic organisms, rapidly hydrolyzes yet leaves behind toxic by-products.
Soil Fate: Breaks down quickly in moist conditions, but may impact local ecosystems before full decomposition.
Air Fate: Vapors disperse, pose local hazard if not well ventilated.
Bioaccumulation Potential: Low, but chemical’s reactivity creates hazards more from acute than chronic accumulation.
Waste Disposal: Chemical incineration under controlled conditions best reduces risk, collect all residues and contaminated cleanup gear into corrosion-resistant containers.
Environmental Protection: Never discharge into sewers, waterways, or onto the ground.
Regulations: Hazardous waste rules apply—chemical needs professional handling from licensed waste managers.
UN Number: Recognized as hazardous, most transport agencies apply strict rules for shipping.
Packing Group: Considered high-danger according to shipping codes.
Transport Label Requirements: Toxic, corrosive, and environmentally hazardous labels must stay visible at all times.
Handling in Transit: Packages need protection against tipping, crushing, and direct sunlight. Ventilated vehicles and trained handlers prevent leaks and accidents.
Local Rules: Tight restrictions surround use, storage, transport, requiring specific worker training.
Labeling Requirements: Clear warnings for health, fire, and environmental hazards.
Permits: Operations using this chemical usually must keep documented risk assessments and emergency plans ready.
Community Right-to-Know: Locations above a minimal threshold must notify fire departments and environmental regulators.
