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Product Name: Mixture of Carbon Monoxide and Hydrogen
Chemical Family: Inorganic gas mixture
Synonyms: Water gas, syngas
Recommended Use: Industrial applications, chemical synthesis, fuel gas
Supplier Information: Chemical manufacturer, industrial gas supplier
Emergency Contact: Emergency response number provided by supplier
Physical Hazards: Extremely flammable, compressed gas
Health Hazards: Toxic by inhalation, can cause fatality
Signal Word: Danger
Hazard Statements: May cause fire or explosion; toxic if inhaled; causes central nervous system effects; may cause suffocation by displacing oxygen
Precautionary Statements: Keep away from heat and ignition sources; use in well-ventilated areas; use personal protective equipment
GHS Pictograms: Flame, skull and crossbones, gas cylinder
Carbon Monoxide: 10–90% by volume, CAS Number: 630-08-0
Hydrogen: 10–90% by volume, CAS Number: 1333-74-0
Impurities: Trace amounts of nitrogen, carbon dioxide or methane, depending on source
Inhalation: Remove person to fresh air immediately; provide oxygen if breathing is difficult; seek medical attention immediately for any symptoms such as dizziness, headache, confusion, loss of consciousness
Skin Contact: Mixture is a gas under normal conditions; skin exposure not expected to cause irritation; remove contaminated clothing if present
Eye Contact: Mixture is a gas, unlikely to contact eyes; in the case of pressurized gas release, treat mechanical injury and consult a physician
Ingestion: Not a typical route of exposure; if suspected, seek immediate medical attention
Additional Information: Rescuers should wear self-contained breathing apparatus and avoid entering confined spaces without proper equipment
Suitable Extinguishing Media: Dry chemical, carbon dioxide, water spray for cooling containers
Specific Hazards: Both gases are highly flammable, form explosive mixtures with air
Special Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective clothing
Explosion Hazard: Flashback possible along vapor trail; containers may rupture if heated
Firefighting Instructions: Stop gas flow if safe to do so; move containers away from fire area; cool containers with water spray
Personal Precautions: Evacuate area; ensure adequate ventilation; eliminate ignition sources
Protective Equipment: Use self-contained breathing apparatus, avoid direct exposure
Environmental Precautions: Prevent release into confined spaces without ventilation
Containment and Clean-up: Ventilate area; stop leak if safe; do not attempt to repair leaks without proper training and equipment
Notification: Report significant spills or releases to authorities as required
Precautions for Safe Handling: Handle only with proper training and procedures; avoid inhalation; do not smoke or use open flames in storage or handling areas
Storage Conditions: Segregate from oxidizing agents; store in cool, dry, well-ventilated areas; use only with compatible piping and containers certified for compressed gases
Technical Measures: Use explosion-proof electrical equipment; ground all containers and transfer lines
Special Rules: Never tamper with safety devices; secure cylinders to prevent falling
Occupational Exposure Limit: Carbon Monoxide ACGIH TLV: 25 ppm; OSHA PEL: 50 ppm
Hydrogen: No established occupational limit; asphyxiant
Engineering Controls: Local exhaust ventilation, continuous gas monitoring in work area
Personal Protective Equipment: Self-contained breathing apparatus for high concentrations; flame-resistant clothing; chemical-resistant gloves; safety goggles if risk of splash or pressure leak
Hygiene Measures: Avoid eating, drinking, or smoking in work area; wash thoroughly after handling
Appearance: Colorless gas
Odor: Carbon monoxide is odorless; hydrogen is odorless
Boiling Point: Carbon monoxide: -191.5°C; hydrogen: -252.9°C
Molecular Weight: Varies with composition, typically between 14 and 28 g/mol
Vapor Density: Lighter than air
Solubility: Low solubility in water for both components
Flammability: Flammable limits for carbon monoxide: 12.5–74% in air; hydrogen: 4–75% in air
Auto-ignition Temperature: Carbon monoxide: 609°C; hydrogen: 500°C
Chemical Stability: Stable under recommended storage conditions
Conditions to Avoid: Heat, flames, sparks, incompatible materials
Incompatible Materials: Strong oxidizers such as chlorine, oxygen, peroxides; halogens; copper and its alloys (hydrogen)
Hazardous Decomposition Products: None under normal storage and use
Reactivity: Mixture is highly flammable and may react explosively with air
Acute Toxicity – Inhalation: Carbon monoxide exposure displaces oxygen, causing headaches, dizziness, nausea, unconsciousness, potentially fatal effects
Chronic Effects: Prolonged exposure affects cardiovascular, neurological systems; can cause memory loss, behavioral changes
Carcinogenicity: Carbon monoxide not classified as carcinogen; hydrogen is not classified
Other Health Effects: Can increase risk of heart attack in vulnerable individuals; hydrogen acts mainly as asphyxiant
Data on Immediate Effects: Symptoms appear after short exposure at high concentrations; delayed effects possible
Ecotoxicity: No evidence of long-term harmful effects when released in small quantities to air; not known to bioaccumulate
Persistence and Degradability: Rapidly disperses in air; both gases react in atmosphere to form water and carbon dioxide
Bioaccumulation Potential: Not expected for either gas
Mobility in Environment: Gases disperse rapidly; not retained in soil or water
Other Adverse Effects: Large releases may contribute to ground-level ozone formation, indirect role in greenhouse gas effect
Waste Disposal Methods: Vent gas in dilute concentrations to atmosphere in accordance with regulations; avoid direct release in confined or occupied spaces
Contaminated Packaging: Return cylinder to supplier; do not attempt to refill or remove valves
Special Precautions: Dispose only by trained personnel; follow legal requirements for hazardous waste
UN Number: UN 1965
Transport Hazard Class: Class 2.3 (Toxic Gas), Class 2.1 (Flammable Gas)
Labeling Requirements: Flammable gas, toxic gas
Packing Group: Not applicable
Special Transport Precautions: Secure cylinders during transport; avoid heat, rough handling; ensure labeling is clear and legible
Regulatory Guidance: Comply with all local, national, and international regulations for gas cylinders
OSHA: Classified hazardous under OSHA Hazard Communication Standard
EPA: Carbon monoxide listed under Clean Air Act as hazardous air pollutant; hydrogen regulated as extremely hazardous substance for storage
TSCA (Toxic Substances Control Act): Both components listed
Other Applicable Regulations: SARA Title III, CERCLA, European REACH, Canadian WHMIS
Label Elements: Signal word “Danger”; hazard statements and pictograms required
