SDS Vault Safety Data Sheet Reference

Oxygen (Compressed Gas)

CAS: 7782-44-7 Category: Welding ⚠ DANGER
Also known as: O2, Compressed oxygen, Medical oxygen, Industrial oxygen

Quick Facts

CAS Number7782-44-7
Signal WordDANGER
GHS Hazard Classesoxidizing, compressed gas
NFPA RatingHealth: 0 / Flammability: 0 / Reactivity: 3 / Special: OX
Common NamesO2, Compressed oxygen, Medical oxygen, Industrial oxygen
PubChem CID977

Hazard Summary

⚠ DANGER: Strong oxidizer that dramatically intensifies combustion. Oxygen-enriched atmospheres (>23.5%) cause ordinary materials to burn with extreme intensity. NEVER use oil, grease, or contaminated fittings on oxygen equipment.

GHS Hazard Pictograms

🔆 Oxidizer 🔵 Compressed Gas

Hazard Statements (H-codes)

H270 – May cause or intensify fire; oxidizer
H280 – Contains gas under pressure; may explode if heated

Precautionary Statements (P-codes)

P220 – Keep away from combustibles
P244 – Keep valves and fittings free from oil/grease
P370+P376 – In case of fire: Stop leak if safe to do so
P403 – Store in well-ventilated place

First Aid Measures (Section 4)

👁 Eye Contact
High-pressure gas contact: flush with water. Cryogenic contact: do not rub; flush with tepid water; seek medical attention.
🖐 Skin Contact
Cryogenic contact causes frostbite. Do not rub. Warm with tepid water. Seek medical attention.
🫁 Inhalation
Pure O2 breathing: remove from source. While O2 is not toxic short-term, high-pressure exposure can cause O2 toxicity (CNS effects) in diving scenarios.
🫦 Ingestion
Not applicable.

Storage & Handling

🔒 Storage & Handling: Separate oxygen cylinders from fuel gas cylinders by at least 20 feet or a fire wall. Store upright, secured, away from oil and grease. Use only oxygen-compatible fittings.

PPE Requirements

Safety glasses
No oily gloves or clothing
Flame-resistant clothing in oxygen-enriched environments
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