Hydrogen
Hydrogen (CAS: 1333-74-0, H2) is the lightest and most abundant chemical element. This highly flammable gas, with a molecular weight of 2.02 g/mol, is a critical component in numerous industrial processes. Its primary applications span chemical synthesis and its use as a specialty gas and synthetic reagent, underpinning advancements in various scientific and industrial fields.

Chemical Synthesis
Hydrogen is extensively used as a reducing agent and reactant in the synthesis of various chemicals, including ammonia and methanol. It is also crucial in hydrogenation processes for organic compounds.
Specialty Gas
As a specialty gas, hydrogen serves in applications requiring high purity, such as carrier gas in gas chromatography and in semiconductor manufacturing processes.
Synthetic Reagent
Hydrogen acts as a fundamental synthetic reagent in creating complex molecules and materials. Its reactivity makes it invaluable in research and development settings.
Welding and Cutting
Hydrogen gas is employed in specific welding and cutting applications, often in mixtures, due to its high flame temperature.
| Molecular weight | 2.02 |
|---|---|
| Empirical formula | H2 |
| Assay | ≥99.999% |
| Boiling point | −252.8 °C(lit.) |
| Vapour density | 0.07 (21 °C, vs air) |
| Autoignition temp | 1060 °F |
| Melting point | −259.2 °C(lit.) |


Hazard statements
- H220Extremely flammable gas
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | Eyeshields, Faceshields, Gloves, half-mask respirator (EU), half-mask respirator (US), multi-purpose combination respirator cartridge (US) |
|---|---|
| Transport (UN / ADR) | UN 1049 2.1 |
| Water hazard class (WGK, DE) | nwg |
| Hazard codes (EU) | F+ |
| Risk statements (R) | 12 |
| Safety statements (S) | 9-16-33 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Hydrogen used for?
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Hydrogen (CAS: 1333-74-0, H2) is used in chemical synthesis, as a specialty gas, as a synthetic reagent, and in welding and cutting applications.
What are the CAS number and formula for Hydrogen?
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The CAS number for Hydrogen is 1333-74-0, and its chemical formula is H2.
What grade and purity does Tech Serve Solutions supply for Hydrogen?
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Tech Serve Solutions supplies Hydrogen with an assay of ≥99.999%. This product is not represented as USP, BP, or EP grade.
How should Hydrogen be handled safely?
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Hydrogen is extremely flammable (H220) and requires careful handling. Use in well-ventilated areas away from ignition sources. Personal protective equipment such as eyeshields, face shields, gloves, and appropriate respiratory protection is recommended.
How is Hydrogen packed, shipped, and exported?
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Hydrogen is shipped under the UN 1049 designation for Class 2.1 flammable gases. Specific packaging and export procedures comply with international regulations.
How can I request a sample or quote for Hydrogen?
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To request a sample or quote for Hydrogen, please contact our sales team through the website or by phone.
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