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Methane (CH₄)

Properties and Applications

Methane (CH₄), a type of Industrial Gas, is a colorless, odorless, and non-toxic organic compound with distinct physical characteristics. Under standard temperature and pressure (STP), methane exists as a gas with a density approximately 0.55 times that of air, making it lighter and minimally soluble in water. It transitions to liquid at -161.5°C (boiling point) and solidifies at -182.5°C (melting point), remaining gaseous under ambient conditions. Methane is commonly used as a fuel for heating, cooking, and power generation. Because it is an odorless hydrocarbon gas, it is often mixed with substances that have an odor to report leaks or spills in pipes and systems.

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Specifications

YIGAS is a methane gas supplier providing 99.9%, 99.99% and 99.999% CH₄ for industrial processing, analytical laboratories, gas detector calibration, specialty gas blending, chemical research and selected semiconductor and electronic manufacturing applications. Our methane gas is supplied in high-pressure cylinders with CGA350 valves. Standard packaging includes 40L cylinders containing approximately 6 m³, 47L cylinders containing approximately 7 m³ and 50L cylinders containing approximately 10 m³.

For industrial distributors, laboratories, gas mixture companies and process manufacturers, selecting a methane supplier requires more than comparing the headline purity. Buyers should also review ethane, nitrogen, oxygen, water, hydrogen, carbon dioxide, hydrogen sulfide and other hydrocarbon limits according to the intended process.

YIGAS supports single-grade evaluation, multi-cylinder commercial orders, recurring delivery programs and customized methane calibration gas mixtures.

CAS No.	74-82-8
UN No.	1971
EINECS No.	200-812-7
Molecular Weight	16.043
Appearance	Colorless, odorless
Melting Point	-182.5 °C
Boiling Point	-161.5 °C
Density	0.717g/L
DOT Class	2.1
Label	Flammable Gas

	Industrial grade methane	Industrial grade methane	Electronic Grade Methane
Specification	99.9%	99.99%	99.999%
H2	≤ 50 ppm	≤ 10 ppm	≤ 0.5 ppm
O2+Ar	≤ 50 ppm	≤ 10 ppm	≤ 1 ppm
N2	≤ 250 ppm	≤ 35 ppm	≤ 4 ppm
CO2	/	/	≤ 0.5 ppm
C2H6	≤ 600 ppm	≤ 25 ppm	≤ 4 ppm
H2S	/	/	≤ 0.1 ppm
H2O	≤ 50 ppm	≤ 15 ppm	≤ 3 ppm

How to Select the Correct Methane Grade

Choose 99.9% Methane When:

The process is relatively tolerant of trace contaminants.
Methane is used in industrial development or pilot equipment.
The project involves combustion, catalyst or chemical reaction studies.
Cost is more important than ultra-low impurity levels.
The customer has defined acceptance limits compatible with the standard specification.

Choose 99.99% High-Purity Methane When:

Methane is used in analytical or laboratory equipment.
The gas will be used as a raw material for specialty gas blending.
Lower moisture, oxygen, nitrogen and ethane levels are required.
Repeatable gas composition is important.
A high-purity compressed gas is required but electronic-grade limits are unnecessary.

Choose 99.999% Electronic Grade Methane When:

The process is sensitive to oxygen, moisture and sulfur contamination.
Methane is used as a carbon-source gas in selected electronic processes.
The customer requires individual impurity control at low ppm levels.
The product must be reviewed under a semiconductor or electronic-material qualification process.
Batch consistency and analytical documentation are part of the purchase specification.

A 99.999% assay does not automatically confirm suitability for every semiconductor process. The customer should compare the full impurity table with the approved material standard.

Request Methane Specifications and a Commercial Supply Quotation

Please provide your required purity, application, cylinder quantity, annual consumption, valve requirement, destination and required delivery date.

Packaging Specifications

Gas Container >>

Cylinder Specifications		Content	Pressure
Cylinder Capacity	valve	volume	Bar	PSIG
40L	CGA350	6 m3	150	2175
47L	CGA350	7 m3	150	2175
50L	CGA350	10 m3	200	2900

How to Choose the Correct Methane Cylinder Size

Cylinder selection should be based on consumption rate and site operation rather than choosing the largest cylinder automatically.

40L Methane Cylinder

Suitable for:

Moderate laboratory consumption
Periodic equipment testing
Pilot-scale processes
Sites with limited cylinder space
Customers that prefer easier handling

47L Methane Cylinder

Suitable for:

Regular laboratory use
Specialty gas blending
Gas analyzer development
Recurring process demand
Standard multi-cylinder shipments

50L High-Pressure Methane Cylinder

Suitable for:

Higher gas consumption
Longer operating periods between cylinder changes
Commercial gas blending
Pilot production equipment
Applications where fewer cylinder changes are preferred

The customer should also consider whether a single-cylinder system, manual manifold or automatic changeover manifold is required.

Methane for Specialty Gas Blending

Methane is an important raw material for producing single-component and multi-component gas standards.

Typical customers include:

Calibration gas manufacturers
Regional industrial gas distributors
Environmental laboratories
Instrument companies
Natural gas laboratories
Gas detector manufacturers
Research institutions
Oil and gas service companies
Petrochemical testing laboratories

The suitability of a methane grade for blending depends on the concentration of the final mixture.

For example, trace impurities in the source methane may become insignificant in a low-concentration mixture, while they may remain important in high-percentage natural gas standards.

Before selecting the raw material, the mixture producer should consider:

Final methane concentration
Number of mixture components
Analytical uncertainty
Required traceability
Cylinder material
Internal cylinder treatment
Balance gas purity
Required shelf life
Customer acceptance criteria
Applicable calibration method

YIGAS can review customized gas mixture requirements through our gas customization services

Why Choose YIGAS as Your Methane Gas Supplier?

Three Methane Purity Grades

YIGAS supplies 99.9%, 99.99% and 99.999% methane, allowing buyers to select a grade according to industrial, analytical or electronic process requirements.

Published Impurity Limits

The methane specifications include defined limits for hydrogen, oxygen plus argon, nitrogen, ethane, moisture and selected contaminants.

Multiple Cylinder Options

Customers can select:

40L / approximately 6 m³ / 150 bar
47L / approximately 7 m³ / 150 bar
50L / approximately 10 m³ / 200 bar

All published configurations use CGA350 valves.

Industrial and Specialty Gas Experience

YIGAS supplies gas products for industrial manufacturing, laboratories, electronics, environmental monitoring and chemical processes.

Customized Gas Mixtures

Methane mixtures can be evaluated according to concentration, balance gas, tolerance, cylinder size, valve and certification requirements.

Quality and Traceability Support

Product, batch and cylinder information can be managed according to the agreed specification and documentation requirements.

Commercial Supply Planning

Multi-cylinder orders, recurring delivery schedules and annual consumption programs can be reviewed for qualified customers.

Application-Based Grade Selection

The technical team can review whether 99.9%, 99.99% or 99.999% methane is more suitable for the intended process.

International Logistics Coordination

YIGAS evaluates destination, cylinder, dangerous-goods documentation and shipping-route requirements before confirming export orders.

Request a Methane Gas Supply Proposal

Source industrial, high-purity or electronic-grade methane from a gas supplier that can support purity selection, cylinder compatibility, calibration gas customization and recurring commercial delivery.

Send us:

Required methane purity
Target impurity limits
Intended application
Cylinder size and quantity
Estimated annual consumption
Required methane mixture concentration
Destination country and port
Required technical documents
Expected delivery schedule

YIGAS will review your product, packaging, quality and logistics requirements and provide a suitable CH₄ supply proposal.

Request 99.9%–99.999% Methane Specifications

Get a Multi-Cylinder Methane Quotation

Discuss a Customized CH₄ Calibration Gas Mixture

Key Applications

Catalyst Regeneration & Hydrogenation

Catalyst regeneration and hydrogenation are key processes in the chemical and petrochemical industries. YIGAS provides high-purity hydrogen (H₂), carbon monoxide (CO), and methane (CH₄) to support industrial catalytic reactions, petroleum processing, and fine chemical production.

Air Emissions Monitoring

Air emission monitoring is crucial for environmental protection and compliance. YIGAS provides high-purity calibration gases, mixed gases, and standard gases, widely used in flue gas monitoring, industrial emission testing, and environmental laboratory analysis. Our products cover sulfur dioxide, carbon dioxide, methane, nitrogen, and oxygen, ensuring accurate and stable monitoring results for our clients.

FAQ

Q1. What is methane gas used for in industry?

Methane is widely used as a fuel, for power generation, chemical feedstock, and hydrogen production.
Q2. What purity levels of methane do you supply?

We supply methane with 99.9%-99.999% purity for laboratories and electronics.
Q3. How is methane gas delivered?

Methane is supplied in high-pressure cylinders, bulk ISO tanks depending on customer requirements.
Q4. Is methane gas flammable?

Yes. Methane is highly flammable and should be stored and transported with strict safety precautions.
Q5. What is the price of methane gas per cubic meter or per ton?

Methane pricing depends on global natural gas market trends and order volume. Contact us for quotations.
Q6. What is the difference between natural gas and pure methane?

Natural gas contains methane as the main component along with small amounts of other hydrocarbons. Pure methane is refined for specific industrial uses.
Q7. What certifications do your methane products have?

Our methane gas complies with ISO, SGS, and international safety standards.
Q8. Where to buy bulk methane gas?

Bulk methane is available from YIGAS suppliers.

Why Choose YIGAS?

Team

Global Leadership: Management team with multinational and listed company backgrounds, backed by decades of expertise in the industrial gases sector.

End-to-End Expertise: Integrated capabilities spanning production, operation, R&D, commercialization, and quality assurance in gas industry.

Technical Excellence: Advanced knowledge in gas/chemical synthesis, purification, and process optimization, supported by on-demand technical application services.

R & D

Innovation-Driven: Focus on cutting-edge R&D to deliver safer, sustainable, and cost-effective gas solutions.

Full-Cycle Development: From concept design to scalable production, ensuring seamless technology transfer and market readiness.

Service

Customer-Centric Solutions: Tailored services with flexibility, professionalism, and 24/7 dedicated support.

Value Proposition: Guaranteed supply chain stability, safety compliance (ISO/OSHA standards), and total cost optimization.

Quality

Zero-Compromise Standards: Rigorous QC protocols for both in-house and outsourced products, validated by third-party certifications.

Operational Precision: Expertise in lean production management, analytical quality control, and continuous process improvement.

Industrial & Specialty Gases

Helium

Stable Supply Chain: Our helium sources originate from Qatar and the United States, ensuring reliable supply.

Helium as Core Business: With significant investments, our Zhongshan-based factory spans 13,000 m² and boasts an annual liquid helium production capacity of 300 tons.

China’s Most Advanced Facilities:

Equipped with the nation's most advanced liquid helium and helium filling production lines.

Certified under the ISO 9001:2008 Quality Management System.

Utilizes internationally recognized "filling island-style" production lines.

Gaseous helium from a reliable gases supply is ideal for semiconductor lithography, fiber-drawing, leak detection, carrier gas in GC, and balloon inflation. Liquid helium, sourced from a dedicated gases supply chain, is dedicated to MRI magnet cryo-cooling, superconducting magnet maintenance, and low-temperature physics research.

Ethylene

Ethylene, a colorless, slightly sweet-smelling hydrocarbon (C₂H₄), is the backbone of modern petrochemical industries. As the simplest alkene with a reactive carbon-carbon double bond, it exhibits high flammability (explosive range: 2.7–36% in air) and serves as a critical building block for synthetic chemistry. Used as feedstock for LLDPE/HDPE, epoxy ethane and ethanol production. Compatible with swing-reactor and high-pressure tubular processes. Our ethylene is supplied in high-purity grades (≥99.9% polymer-grade, ≥99.5% chemical-grade) via ISO-certified cylinders, backed by a reliable gases supply network to ensure consistent delivery to your operations.

Propane

Propane, a colorless, odorless, and highly flammable alkane (C₃H₈), is a cornerstone of liquefied petroleum gas (LPG) with a boiling point of -42°C, enabling efficient storage and transport as a liquid under moderate pressure. Propane is renowned for its high calorific value (50.33 MJ/kg) and clean combustion properties, making it an ideal choice for high-temperature brazing, metal cutting, forklift fuel, and LPG blending. Supplied in ISO-certified cylinders or bulk tanks through our dependable gases supply network.

Sulfur Dioxide

Sulfur dioxide (SO₂), a colorless gas with a pungent odor and high water solubility, is a versatile inorganic compound widely used in chemical manufacturing, pulp and paper processing, and as a food desiccant and preservative. It is also commonly used in sulfuric acid production and in the desulfurization of natural gas and oil. With a boiling point of -10°C, it serves as both a reactive intermediate and a functional additive, though its environmental impact as a primary air pollutant requires stringent handling. Our SO₂ is supplied in ISO-certified cylinders.

Ethylene Oxide

Ethylene oxide (C₂H₄O), a colorless, flammable gas with a faintly sweet odor, is a highly reactive epoxide critical to modern industrial and medical applications. It is primarily used for the cryogenic sterilization of disposable syringes, endoscopes, and pacemakers. With a boiling point of 10.4°C, it transitions to a liquid below this temperature, exhibiting excellent miscibility with water, ethanol, and ether. Its explosive range (3–100% in air) and carcinogenicity (Class 1B per IARC) necessitate stringent handling under NFPA 704 protocols (Health 4, Flammability 3). Supplied in ISO-certified cylinders or nitrogen-diluted blends.

Methane

We Look Forward To Working With You.