Gas Detector Knowledge Gas Recognition: Oxygen (O2)

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Chemical Identity
● Product Name: Oxygen (Cooled)
● Chemical Formula: O₂
● Common Names: Oxygen (Cooled), Oxygen USP, LOX, Cryogenic Liquid Oxygen
● Product Use Type: General Industry

[Composition/Composition Information]

Ingredient CAS Number Concentration (Volume)
Oxygen 7782-44-7 100%

Concentration is nominal. For the exact concentration of the mixture, refer to the technical specifications.

[Overview of Dangers]
Emergency Summary
● Extremely cold liquid and pressurized gas.
● Direct contact with liquid can cause frostbite.
● May react violently with flammable materials.
● Keep away from oil, grease, and combustibles.
Potential Health Hazards
● Inhalation: Breathing 75% or more of atmospheric oxygen for several hours may lead to nasal congestion, cough, sore throat, chest pain, and difficulty breathing. Breathing pure oxygen can cause lung damage and affect the central nervous system. Atmospheric oxygen pressure of 75% or more may also cause similar symptoms.
● Eye Contact: Contact with liquid may cause cold burns or frostbite.
● Skin Contact: Contact with liquid may cause severe frostbite.
● Ingestion: Not considered a potential route of exposure.
Exposure Guidelines
● Main route of exposure: Inhalation, eye, and skin contact.
Target Organ: None.
Exacerbation of pre-existing conditions: If used by individuals with chronic obstructive pulmonary disease, increased oxygen levels may raise blood oxygen, reduce breath pressure, and increase carbon dioxide retention to dangerous levels.

[First-Aid]
• Skin Contact: Remove contaminated clothing and shoes immediately. Flush eyes or skin with water for at least 15 minutes. Do not remove clothing unless necessary. Place affected area in warm water (not exceeding 40°C) if possible. Cover with sterile dressing.
● Eye Contact: Rinse immediately with water and seek medical attention.
● Ingestion: Not considered a potential route of exposure.
● Inhalation: Seek medical attention after severe exposure. Move to fresh air.

[Fire-Fighting Measures]
● Suitable Extinguishing Agents: All known agents can be used. Use appropriate agent for surrounding fire.
● Special Hazards: Combustibles in contact with liquid oxygen may explode when ignited or impacted. Some non-flammable substances may burn in oxidant environments. Vapor clouds may reduce visibility. Evacuate site and remove all ignition sources until all leaked liquid has evaporated.
● Personal Protective Equipment for Firefighters: Wear self-contained breathing apparatus if necessary. Fire-resistant clothing may burn in oxygen-rich environments.
● Other Information: Substances not flammable in air may burn in oxygen-rich environments (>23%).

[Leakage Emergency Treatment]
● Personal Precautions: Clothing exposed to high oxygen concentrations for 30+ minutes is a fire hazard. Stay away from ignition sources. Increase ventilation. Monitor oxygen levels. Leaked oxygen may form an oxygen-deficient vapor cloud.
● Cleaning Methods: Increase ventilation, evacuate, and remove all ignition sources until all liquid has evaporated.
● Additional Advice: Ensure proper ventilation and monitor oxygen content.

[Operation and Storage]
Disposal
● All meters, valves, regulators, and equipment used in oxygen environments must be cleaned. Never use oxygen as a substitute for compressed air. Avoid using oxygen nozzles for cleaning, especially clothing, as it increases combustion risk.
● Always know the product's properties before use. Only trained personnel should handle compressed gas. Check labels before use. Do not remove or damage supplier labels. Before connecting cylinders, ensure the system is suitable for pressure and material. Never allow feedback from the system to the container. Close the valve after each use. Do not attempt to repair cylinder valves. Report any issues to the supplier immediately.
● When transporting cylinders, use carts or trailers even for short distances. Consult your supplier for specific instructions.
Storage
● Warning! Do not change or apply pressure to mating connections. Keep containers vertical. Store in well-ventilated areas, preferably open-air. Avoid temperatures above 50°C. Store full and empty cylinders separately. Keep away from heat and ignition sources. Return empty bottles promptly. Regularly check containers for leaks and damage. Do not store in open air or corrosive environments. Ensure cryogenic containers have pressure safety devices. Separate oxygen containers from flammable gases.

[Contact Control/Personal Protection]
Engineering Controls:
● Prevent oxygen concentration from exceeding 23% in anoxic environments.
Personal Protective Equipment
● Respiratory Protection: Not needed with proper ventilation.
● Hand Protection: Use insulating or leather gloves. Clean gloves free of oil and grease.
● Eye Protection: Use safety glasses when handling cylinders.
● Skin and Body Protection: Avoid touching uninsulated pipes or containers with bare skin. Use safety shoes when handling cylinders.
● Hygiene: Ensure adequate ventilation, especially in confined spaces.

[Physical and Chemical Properties]
● State: Liquefied gas
● Color: Blue
● Odor: Odorless
● Molecular Weight: 32 g/mol
Relative Vapor Density: 1.1 (air = 1)
Relative Density: 1.1 (water = 1)
● Boiling Point: -183°C (-297°F)
Critical Temperature: -118°C (-180°F)
● Melting Point: -219°C (-362°F)
● Water Solubility: 0.039 g/L
Stability and Reactivity
● Stable under normal conditions.
● Avoid: Oil, grease, flammable substances, organic matter, aluminum, carbon steel, and reducing agents.

[Toxicology Information]
Acute Health Hazards
● Ingestion: No useful information available.
● Inhalation: No useful information available.
● Skin Contact: No useful information available.
Chronic Health Hazards
● Premature infants exposed to high oxygen levels may suffer retinal damage, leading to detachment and blindness. Adults exposed to 100% oxygen for 24–48 hours may also experience retinal damage. At 2 atmospheres, CNS poisoning may occur, causing nausea, dizziness, seizures, and loss of consciousness. At 3 atmospheres, symptoms may appear within minutes.

[Ecological Data]
● Ecotoxicological Effects: No relevant data on water toxicity or other organisms.
● Persistence and Degradability: No relevant data on liquidity or bioaccumulation.

[Disposal]
● Unused Products: Return to the supplier in original cylinders.
● Contaminated Packaging: Recycled by the supplier.

[Transport Information]
● CFR Transport Name: Oxygen, Cooling Liquid | Rating: 2.2(5.1) | UN/ID: UN1005
● IATA Shipping Name: Oxygen, Cooling Liquid | Rating: 2.2(5.1) | UN/ID: UN1005
● IMDG Transport Name: Oxygen, Cooling Liquid | Rating: 2.2(5.1) | UN/ID: UN1005
● CTC Proper Shipping Name: Oxygen, Cooling Liquid | Rating: 2.2(5.1) | UN/ID: UN1005
● Other Notes: Avoid transporting vehicles without separation from the driver’s cabin. Ensure the driver understands hazards and emergency procedures.

[Regulatory Information]
Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (29CFR 1910.1200)
Hazard Ratings: Oxidizers, Low Temperature (Cooling)
Country List of Regulations
United States TSCA
EU EINECS
Canada DSL
Australia AICS
Japan ENCS
Korea ECL
China SEPA
Philippines PICCS
EPASARA Title III, Section 312 (40CFR370): Acute Health Hazards, Fire Hazards
California Safe Drinking Water and Toxic Enforcement Act (Proposition 65): This product does not contain chemicals known to cause cancer, birth defects, or other harmful effects in California.

[Other Information]
Level: NFPA Level Level: HMIS Level
Health: 3 Health: 3
Flammability: 0 Flammability: 0
Instability: 0 Physical Hazards: 2
Special Case: Ox

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