Gas Detector Knowledge of Gas Awareness: Hydrogen (H2)

Chemical identity
● Product Name: Hydrogen ● Chemical Molecular Formula: H2
● Alias: Hydrogen ● Product Use Type: General Industry

[composition/composition information]

ingredient	CAS number	Concentration (volume)
hydrogen	1333-74-0	100%

Concentration is nominal. For the exact concentration of the mixture, please refer to the company's specifications.

【Overview of dangers】
Emergency summary
● In case of intangible fire burning.
● High pressure gas.
● Can cause rapid suffocation.
● Extremely flammable.
● May form explosive mixtures with air.
● When mixing with air at a concentration above the lower combustion limit (LFL), there is a direct risk of fire and explosion.
● High concentrations of gas in the flammable range can cause rapid suffocation and should limit access.
● Avoid breathing gas.
● Self-contained breathing apparatus (SCBA) may be required.
Potential health hazards
● Inhalation: High concentrations may cause suffocation. Symptoms may include loss of flexibility/loss of consciousness. The victim may not understand the danger of suffocation.
Suffocation may cause unconsciousness to lose consciousness, and its speed is very fast. The victim cannot protect himself.
● Skin contact: No adverse effects.
● Ingestion: Ingestion is not considered as a potential route of exposure.
● Chronic health hazards: Not applicable.
Exposure guidelines
● The main invasive route: Inhalation.
● Target Organ: Unknown.
symptom
● Exposure to oxygen-deficient conditions may cause the following symptoms: dizziness, runny nose, nausea, vomiting, loss of flexibility, loss of consciousness.
Exacerbated illness
● unknown.
environmental impact
● harmless.

【first-aid】
● General advice: Wear self-contained breathing apparatus to move patients to non-contaminated areas. Warm and rest for the patient. Get medical attention. If breathing stops, use artificial respiration.
● Skin contact: Flush with water and soap as a precautionary measure.
● Ingestion: Ingestion is not considered as a potential route of exposure.
● Eye contact: Immediately flush with plenty of water for at least 15 minutes.
● Inhalation: If air is short, deliver oxygen. Move to fresh air. If breathing stops or is difficult, give artificial respiration. May require supplemental oxygen. If the heartbeat stops, CPR should be performed immediately by trained personnel. Get medical attention.

【Fire-fighting measures】
● Suitable extinguishing agents: All known extinguishing agents can be used.
● Special hazards: Static electricity can ignite. In case of invisible fire burning. Gas is lighter than air and can accumulate at the top of enclosed spaces. When exposed to high heat or flames, the cylinders quickly drain and/or violently explode. Keep the container and the environment cool with water mist. Fire only when airflow is blocked. If possible, shut off the air supply and let the flames burn out. It is forbidden to extinguish a leaked gas flame unless absolutely necessary. Natural/explosive reburning may occur. Fight all other fires. Keep away from the cylinder and spray it from a protected location to cool it. Cool adjacent cylinders with plenty of water until the flames burn out. If the flame is accidentally extinguished, an explosive reactivation may occur. Therefore, appropriate protective measures should be taken (for example, full evacuation to prevent people from being injured by cracked cylinder fragments and toxic fumes). When exposed to high temperatures, most of the cylinders are used to discharge the contents.
● Special personal protective equipment for firefighters: If necessary, wear self-contained breathing apparatus when extinguishing.
● Other information: The presence of a hydrogen flame can be judged by carefully sticking out the straw bar to make the flame visible.

[Leakage emergency treatment]
● Personal precautions: Evacuate personnel to a safe area. Eliminate all ignition sources. It is forbidden to enter other areas where the enclosed space or the concentration of flammable gas exceeds the lower explosion limit by 10%. Increase ventilation in the operating area.
● Environmental precautions: Do not discharge in places where there is a risk of accumulation. Should not be released into the environment. Prevent continued leakage or spillage while ensuring safety.
● Cleaning methods: Increase the ventilation of the operating area. Close to suspected leakage areas should be careful.
● Other suggestions: Increase the ventilation in the leak area and monitor the concentration. If you leak from a cylinder or cylinder valve, call AirProducts emergency number. If leaks occur in the customer's system, the cylinder valve should be closed before attempting repair, safely vented, and purged with inert gas.

[Operation and Storage]
Disposal
● If the valve opens to contact the air, combustion may occur. Prevent physical damage to the cylinder. Do not tow, pull, roll or kick the cylinder.
The temperature in the storage area must not exceed 50°C (122°). Only properly trained and experienced personnel can operate the compressed gas. Check the label for confirmation before use. Before use, you should know and understand the product's characteristics and dangers. If you have questions about how to operate a particular gas, consult your supplier. Do not remove or damage the label provided by the supplier to confirm the contents of the cylinder. When transporting cylinders, the trailers (carts, trolleys, etc.) are transported even at short distances. Be sure to cap the bonnet until the cylinder is fixed to the wall, ready for use on the shelf or in the equipment. Use an adjustable wrench with a wrench to open the tight or rusted bonnet. Before connecting the cylinders, pay attention to the following: The gas system is suitable, especially the pressure range and material. Before using the connection container, feedback from the system to the container is prohibited. Ensure that the entire gas system is compatible with the pressure rating and structural materials. Before use, make sure that the entire gas system has been checked for no leakage. When the gas is released into the system at a lower pressure level than the vessel, a suitable pressure regulator is used. Do not insert anything into the bonnet (eg, wrench, screwdriver, crowbar, etc.). Doing so can damage the valve and cause a leak. Slowly open the valve. When users encounter any difficulties with the cylinder valve, stop using it and contact the supplier. Even if it is connected to the device, close the valve after each use and after it is empty. Do not attempt to repair cylinder valves and pressure relief devices. If the valve is damaged, report the supplier immediately. The valve should be closed after each use and when empty. After removing the cylinder from the equipment, the outlet plug should be replaced as soon as possible. Do not subject the cylinder to abnormal mechanical vibration, as it may damage the valve and pressure relief device. Do not attempt to use a valve cap to lift the cylinder. Cylinders can only be used as containers for gases and cannot be used as rollers, supports or other uses. Do not re-compress the arc on the gas cylinder or make it part of the circuit. Do not smoke when handling gas or cylinders. Do not recompress the gas before consulting the supplier. Do not try to transfer gas from one cylinder to another. Use anti-reverse devices on the pipeline. Air is purged out of the system before the gas is introduced. Valve outlet plugs should be installed when returning the cylinder. Do not use open flame or electric heating equipment to increase the pressure inside the container. The container temperature must not exceed 50°C (122°). Should be avoided below -30°C (-20°) for long periods. All piping systems and associated equipment must be grounded.
store
● The cylinders should be stored in a well-ventilated building, preferably open to the atmosphere. Obey all local regulations on container storage. Check the condition of the container regularly and check for leaks. Do not store in open air to prevent rust and extreme weather. Do not store cylinders in environments that may accelerate corrosion. The cylinders should be stored upright and the bottle body should be fixed to prevent tipping. Close the valve and install the appropriate outlet cap (Cap) or outlet plug (Plug). Container bonnet or protective device to be installed in place. Keep containers tightly closed in a cool, well-ventilated place. Store containers in areas where there is no risk of fire and keep them away from heat and sources of ignition. Full and empty cylinders should be isolated. Avoid storage temperatures exceeding 50°C (122°). Smoking is strictly forbidden when storing products or handling products or containers. Set the "No smoking or open flame" mark in the storage area. The amount of flammable or toxic gas stored should be kept to a minimum. Return empty bottles promptly. The place where flammable substances are stored should be separated from oxygen and other oxidants by at least 20 feet (6.1 meters), or separated by at least 5 feet (1.5 meters) high non-combustible material barrier, and fireproof time of at least 1/2 hour . Technical/Preventive Measures Containers should be stored in categories classified according to local regulations (eg, flammable, toxic, etc.). Keep away from combustibles. All electrical equipment in the storage area should be compatible with stored flammable substances. Containers containing flammable gases should be stored separately from other combustible materials. Containers containing oxygen and oxidants and flammable gases should be separated by fire protection.

[contact control/personal protection]
engineering control
● Provide sufficient natural ventilation or explosion-proof ventilation to ensure that flammable gas concentrations do not reach the lower explosion limit.
PERSONAL PROTECTIVE EQUIPMENT ● Respiratory Protection: High concentrations of gas in the flammable range can cause rapid suffocation and should be restricted to entry.
● Hand protection: It is recommended to use safety gloves when handling cylinders. The penetration time of the selected glove must be greater than the predetermined period of use.
● Eye protection: It is recommended to use safety glasses when handling cylinders.
● Skin and body protection: Safety shoes are recommended when handling cylinders. Suitable for wear: flame retardant protective clothing.
● Specific instructions on hygiene protection: Ensure adequate ventilation, especially in confined areas.

[Physical and Chemical Properties]
● Condition: liquefied gas.
● Color: colorless.
● Odor: None.
● Molecular weight: 2.02g/mol
Relative vapor density: 0.07 (air = 1)
Relative density: 0.07 (water = 1)
● Density: 0.006lb/ft3 (0.0001g/cm3), 70°(21°C)
●Note: (by vapor meter)
● Specific volume: 191.97ft3/lb (11.9830m3/kg), 70° (21°C
) ● Boiling point / boiling range: -423? (-252.9°C)
Critical temperature: -400? (-240°C)
● Melting point/melting range: -435?(-259.2°C)
● Self-ignition temperature: 1,040? (560°C)
● Upper explosion limit: 75% (V)
● Lower explosion limit: 4% (V)
● Water solubility: 0.0016g/l

Stability and Reactivity
● Stability: Stable under normal conditions.
● Conditions to avoid: heat, open flames, and sparks. May form explosive mixtures with air and oxidants.
● Incompatible materials: Oxygen oxidants [Toxicological information]
Acute health hazards ● Ingestion: The product itself has no useful information.
● Inhalation: The product itself has no useful information.
● Skin: The product itself has no useful information.

[ecological data]
● Ecotoxicological effects:
Water toxicity: The product itself has no useful information.
Toxicity to other organisms: No relevant information available.
● Persistence and degradability:
Liquidity: No relevant information.
Bioaccumulation: The product itself has no useful information.
Other information: This product has no known ecotoxicological effects.

Disposal
• Residual/unused products: If you need guidance, contact the supplier. Return the unused product to the supplier with the original cylinder. Do not discharge into areas where there is a risk of explosive mixtures with air. Exhaust gas should be burned in a suitable furnace and a flashback arrestor.
● Contaminated packaging: recycled by the supplier.

【Transport information】
● ADR correct shipping name: Hydrogen, compressed grade: 2.1UN/ID:UN1049
●IATA correct shipping name: Hydrogen, compressed grade: 2.1UN/ID:UN1049
● Correct shipping name of IMDG: Hydrogen, compressed grade: 2.1 UN/ID: UN1049
● RID correct shipping name: Hydrogen, compressed Level: 2.1 UN/ID: UN1049
● Other information: Avoid transporting vehicles that are not separated from the driver's cab through the loading space. Make sure the driver understands the potential hazards and knows what to do in an emergency.

【Regulatory Information】
Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (29CFR 1910.1200) Hazard Ratings • Flammable • Compressed Gases

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) Hazard Classification ● Fire Hazard ● Risk of sudden release of pressure US State of California Safe Drinking Water and Poison Enforcement Act (Recommendation 65)
● This product does not contain any chemicals known to be the cause of cancer, birth defects, or any other harmful effects in California.
【other information】

Level: NFPA Level	Level: HMIS Level
Health:0	Health:0
Flammability: 4	Flammability: 4
Instability: 0	Physical hazards: 3