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Chemical Name: Helium
Common Forms: Compressed gas, Liquefied gas
Uses: Filling balloons, cryogenics, shielding gas in welding, controlled environments in labs, deep-sea diving mixtures
Odor: Helium brings no smell, so no warning leak
Appearance: Colorless, tasteless—even in dense forms
Synonyms: He
Main Risks: Simple asphyxiant; concentration in closed areas can displace oxygen, leading to suffocation
Flammability: Nonflammable, won’t burn or explode
Health Hazards: Sudden inhalation pushes out oxygen; dizziness, unconsciousness, or worse
Pressure Hazard: Cylinders hold helium under high pressure, risk of blast or rocketing canister if dropped or ruptured
OSHA Classification: Compressed gas
Helium Content: Nearly pure, 99.99% or greater
Chemical Formula: He
Additives or Impurities: None present in significant amounts; graded by industrial or scientific requirements
Inhalation: Bring person to fresh air, keep calm, provide oxygen if breathing is hard
Eye Contact: No hazard from gas; blast from high-pressure jet could cause tissue damage
Skin Contact: Direct skin exposure to liquefied helium will freeze tissue rapidly—use tepid water, seek medical attention for frostbite
Ingestion: Not likely under normal use
Medical Help: If person loses consciousness, remove from area, monitor breathing, call emergency services
Sensitivity to Fire: Not a fire risk; helium chokes flames due to inertness
Firefighting Instructions: Cool exposed cylinders with water spray
Personal Protection: Use self-contained breathing apparatus for nearby fires; risk is not from gas but from pressure and cylinder rupture
Decomposition: Helium does not break down into harmful gases
Personal Safety: Evacuate area if leak in closed, poorly ventilated spot
Ventilation: Ensure free airflow to dilute released gas
Protective Equipment: Use protective gloves, eyewear for cylinder handling—not for gas exposure itself
Environmental Impact: Helium dissipates quickly in air, no real ground or water contamination
Special Cleanup: No neutralization required; focus stays on venting and avoiding high-pressure hazards
Storage Conditions: Keep upright, cylinder secure—prevent toppling, valve damage
Temperature: Avoid heat sources; never store near open flames, though not flammable, heat raises cylinder pressure
Transport: Strap firmly, vent properly, never roll or drag
Handling: Avoid dropping, mechanical shock; always open valves slowly, check connections
Engineering Controls: Circulate air, manage ventilation in enclosed zones
Personal Equipment: Wear gloves, safety glasses for cylinder work
Exposure Limits: No set permissible exposure limit for the helium itself; focus sits on keeping oxygen levels above 19.5% in air
Work Practice: Teach about oxygen displacement, always monitor air quality in confined spaces
Physical Form: Gas at room temperature; can be a liquid at cryogenic temperatures
Boiling Point: -269°C; liquefies only at extremely low temperatures
Solubility: Negligible in water
Density: Lighter than air, rises quickly
Reactivity: Inert, resists chemical combinations
Chemical Stability: Stable under recommended storage
Incompatible Materials: None for helium; avoid mixing with air in confined spaces due to asphyxiation, not chemical reactivity
Decomposition Products: Helium remains helium across wide conditions
Conditions to Avoid: Mechanical shock, intense heat, mishandling of pressurized containers
Acute Effects: Inhalation cuts off oxygen, can lose consciousness or suffocate with enough exposure
Chronic Effects: No lasting tissue harm from helium itself, but oxygen deprivation brings permanent danger
Carcinogenicity/Muta-genicity: No evidence linking helium to cancer or mutation
Entry Points: Lungs are main risk route; skin damage only occurs from direct liquefied contact
Persistence/Degradability: Quickly floats off into the upper atmosphere
Bioaccumulation: Helium does not build up in living things
Soil/Water Impact: No damage to soil, water, or wildlife noted from leaking helium
Greenhouse Gas Impact: Not considered a greenhouse gas, no contribution to warming
Gas Disposal: Release safely, well-ventilated, away from people and traffic
Cylinder Disposal: Return to supplier for refilling; empty cylinders can be recycled as scrap metal after valve removal and purging
Environmental Risk: No cleanup required apart from safe venting due to asphyxiation hazard, not chemical pollution
Shipping: Classified as nonflammable compressed gas; use proper gas cylinder marking
Label Requirements: Mark “Compressed Gas”, keep upright, secure during moves
Transport Vehicle: Well-ventilated, cylinders strapped to prevent movement across all transit steps, small leaks demand evacuation of space
Legal Requirements: Observe DOT or similar transport codes; never improvise with storage or moving pressurized cylinders
U.S. Workplace Rules: OSHA covers compressed gases; proper training, labeling, and storage
Environmental Controls: Helium’s not regulated as a hazard to water or soil, focus on confined space safety—no extra reporting for small accidental loss
International Transport: Helium classified as Class 2.2 nonflammable gas under United Nations transport regulations
Employer Role: Train all handlers, review procedures, label right, avoid shortcuts with safety steps
