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Chemical Name: 1,3-Cyclohexadiene
Chemical Formula: C6H8
Appearance: Transparent, colorless to pale yellow liquid
Odor: Mild, hydrocarbon-like
Common Usage: Intermediate for organic synthesis, production of catalyst ligands, monomers for certain resins
CAS Number: 592-57-4
Synonyms: 1,3-CHD, 1,3-Diene-cyclohexane
Flammability: Highly flammable liquid and vapor
Health Hazards: Causes respiratory and eye irritation, can affect the nervous system if inhaled, and may cause dizziness, headache, or drowsiness at high concentrations
Environmental Risk: Harmful to aquatic organisms, potential long-term adverse effects in aquatic environments
Emergency Overview: At room temperature, vapors can ignite easily and can travel a considerable distance, possibly reaching an ignition source
Label Elements: Flame and exclamation mark symbols often used for labeling in lab environments
Exposure Routes: Skin contact, inhalation, accidental ingestion
Component: 1,3-Cyclohexadiene
Concentration: Typically over 95% in commercial materials
Impurities: Trace hydrocarbon isomers possible, usually not specified unless above regulatory thresholds
Additional Components: No significant additives in most lab stocks
Inhalation: Move affected person to fresh air, seek medical attention if symptoms persist, avoid breathing in vapors during rescue
Skin Contact: Remove contaminated clothing, wash area with plenty of water and soap, seek medical attention for irritation
Eye Contact: Rinse thoroughly with water for several minutes, remove contact lenses if possible, consult medical help in case of ongoing symptoms
Ingestion: Call poison control, do not induce vomiting without professional consultation
General Advice: Wash exposed skin thoroughly after handling, monitor for unusual symptoms
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, or alcohol-resistant foam
Unsuitable Media: Water jets can spread flames
Hazards from Combustion: During fire, generates toxic gases, including carbon monoxide and carbon dioxide
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear
Special Procedures: Cool exposed containers with water spray, avoid inhaling fumes by staying upwind
Personal Precautions: Evacuate area, keep away from ignition sources, ventilate enclosed spaces, wear appropriate skin and eye protection
Spill Response: Use inert absorbents (sand, earth), collect material in suitable non-metallic, sealed containers
Environmental Precautions: Prevent from entering drains, surface water, or soil
Cleanup Methods: Ensure proper ventilation, dispose of contaminated materials according to disposal guidelines, decontaminate area after removal
Safe Handling: Work in well-ventilated areas, avoid breathing vapors, prevent contact with eyes and skin, use spark-proof tools
Storage Conditions: Store in tightly sealed containers, in cool, dry, well-ventilated locations, away from heat or direct sunlight
Incompatible Materials: Oxidizing agents, strong acids, and bases react dangerously
Special Considerations: Keep away from flames, electrical sparks, and static discharge sources
Engineering Controls: Use fume hoods or local exhaust ventilation to minimize vapor concentration
Personal Protective Equipment: Chemical-resistant gloves, splash-proof goggles, flame-resistant laboratory coats
Respiratory Protection: Use NIOSH-approved respirators when concentrations exceed safe levels
Hygiene Measures: Wash hands after handling, avoid eating or drinking in work areas
Physical State: Liquid
Melting Point: Below room temperature, approximately -44°C
Boiling Point: About 80-82°C
Density: Near 0.86 g/cm³ at 20°C
Vapor Pressure: Significant at room temperature (about 60 mmHg at 25°C)
Solubility: Slightly soluble in water, miscible with most organic solvents
Flash Point: Around -10°C
Autoignition Temperature: About 250°C
Odor Threshold: Detectable at low concentrations
Chemical Stability: Fairly stable under normal conditions, but unstable with strong light or in the presence of oxidizers
Hazardous Reactions: Reacts with oxidizers and acids to form hazardous products, can form peroxides over time if exposed to air
Polymerization: May undergo exothermic polymerization in some cases
Conditions to Avoid: Direct sunlight, heat sources, open flames, strong oxidizing agents
Acute Toxicity: Primarily through inhalation, may cause headaches, nausea, dizziness, or CNS depression at high vapor concentrations
Chronic Exposure: Long-term effects not widely documented but avoid repeated exposure
Skin and Eye Contact: Can irritate mucous membranes, redness and discomfort expected on contact
Carcinogenicity: Not classified as a known carcinogen by major regulatory bodies
Aquatic Toxicity: Harmful to aquatic life, potential for long-term impact in water bodies
Persistence and Degradability: Not rapidly biodegradable, can persist under certain conditions
Bioaccumulative Potential: No evidence for significant bioaccumulation, but avoid large-scale releases
Mobility in Soil: Mobile in the environment, particularly in liquid spills
Waste Management: Collect in appropriate hazardous waste containers
Disposal Methods: Incinerate in approved facility or dispose according to local hazardous waste guidelines
Special Precautions: Do not dispose of into drains, surface water, or regular trash
Contaminated Packaging: Handle as hazardous waste, fully empty before recycling or disposal
UN Number: Listed under UN1992 for flammable liquid, toxic n.o.s.
Proper Shipping Name: Flammable liquid, toxic, organic n.o.s. (contains cyclohexadiene)
Hazard Class: 3 (flammable liquid); 6.1 (toxic substance)
Packing Group: II
Transport Precautions: Keep containers upright and secure, avoid transporting with oxidizers or incompatible chemicals, label clearly based on contents and hazard level
Workplace Standards: Occupational exposure limits set by authorities in some regions, consult national chemical safety codes
Environmental Listings: May appear on lists controlling emissions and waste discharge for hazardous substances
Labelling Requirements: Requires clear hazard pictograms, risk and safety phrases in line with current chemical hazard communication standards
Restrictions: Certain uses regulated under chemical management laws, storage in large amounts may require notification to authorities
