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Industrial gases

Hydrogen

Also known as Molecular hydrogen, Dihydrogen, Protium

CAS 1333-74-0Formula H2Molar mass 2.02 g/molEC 215-605-7
GHS signal word: Danger. Pictograms: Flammable, Gas under pressure 139 suppliers listed
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Hydrogen chemical structure, H2, CAS 1333-74-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless gas
Melting point
-252.8 Ā°C
Boiling point
-259.2 Ā°C
Density
0.082 g/L
Flash point
Flammable gas
HS code
280410
Category
Industrial gases
UN number
UN 1049
Illustrative photo, a gas cylinder on a trolley on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Hydrogen?

Plain description, key identifiers and synonyms

Dihydrogen is an elemental molecule consisting of two hydrogens joined by a single bond. It has a role as an electron donor, an antioxidant, a fuel, a human metabolite and a member of food packaging gas. It is a gas molecular entity, an elemental molecule and an elemental hydrogen.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
molecular hydrogen
CAS number
1333-74-0 CAS number cross-checkedOther or deprecated CAS: 12184-90-6, 12385-13-6
EC number
215-605-7
Molecular formula
H2
UNII
7YNJ3PO35Z
INCI name
HYDROGEN
InChIKey
UFHFLCQGNIYNRP-UHFFFAOYSA-N
InChI
InChI=1S/H2/h1H
SMILES (canonical and isomeric)
[HH]

Synonyms

  • Molecular hydrogen
  • Dihydrogen
  • Protium
  • hydrogen-1
  • Hydrogen atoms
  • Atomic hydrogen
  • Hydrogen gas
  • Hydrogen in Steel, 1g/piece
  • 1-Butanol, titanium(4+) salt, monohydrate, homopolymer (9CI)
  • Hydrogen, atomic
  • H in Stainless Steel, 1g Balls of O 6.35 mm
  • hidrogeno
  • hydrogene
  • Wasserstoff
  • o-Hydrogen
  • p-Hydrogen
  • hydrogen molecule
  • monoatomic hydrogen
  • T101 Monoclonal Antibody
  • Hydrogen in stainless steel
  • Hydrogen, >=99.99%
  • Hydrogen, >=99.999%
  • Hydrogen in Steel, 1g/ball, 20 pcs
  • UN 1049
  • UN 1966
Show all 30 synonyms
  • Hydrogen, Messer(R) CANgas, 99.999%
  • H in Stainless Steel, 1g Stick of O 3.8x12 mm
  • H in Stainless Steel, 1g Stick of O 4.1x10 mm
  • Hydrogen in Aluminum, 10 rods 0.5" diameter x 24"
  • H-H

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless gasexp.
Odour
Odorlessexp.
Taste
Tastelessexp.
Melting point
-252.8 Ā°Cexp.
Boiling point
-259.2 Ā°Cexp.
Density
0.082 g/Lexp.
Flash point
Flammable gasexp.
Autoignition temperature
500 Ā°Cexp.
Solubility
In water, 1.62 mg/L at 21 Ā°Cexp.
Vapour pressure
1.24 Ɨ 10āŗā¶ mm Hg at 25 Ā°Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
2.02 g/molcalc.
Exact mass
2.0157 Dacalc.
LogP (octanol/water)
0.25calc.
Topological polar surface area
0 ƅĀ²calc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
0calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS04: Gas under pressure
Gas under pressure
400NFPA 704 rating

Hazard statements

  • H220Extremely flammable gas.
Precautionary statements (7)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P377Leaking gas fire: do not extinguish, unless leak can be stopped safely.
  • P381In case of leakage, eliminate all ignition sources.
  • P403Store in a well-ventilated place.
UN number
UN 1049
Transport hazard class
2.1

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Hydrogen suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 139 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

139 suppliers in 13 countries

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Hydrogen price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

In oxy-hydrogen blowpipe (welding) and limelight, autogenous welding of steel and other metals, manufacturing ammonia, synthetic methanol, HCl, NH3, hydrogenation of oils, fats, naphthalene, phenol, in balloons and airships, in metallurgy to reduce oxides to metals, in petroleum refining, in thermonuclear reactions (ionizes to form protons, deuterons (D) or tritons (T).

In bubble chambers to study subatomic particles, as a coolant.

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(Liquid hydrogen).

In cryogenics, in study of superconductivity (Liquid hydrogen).

Production of ammonia, ethanol, and aniline, hydrocracking, hydroforming, and hydrofining of petroleum, hydrogenation of vegetable oils, hydrogenolysis of coal, reducing agent for organic synthesis and metallic ores, reducing atmosphere to prevent oxidation, as oxyhdrogen flame for high temperatures, atomic-hydrogen welding, instrument-carrying balloons, making hydrogen chloride and hydrogen bromide, production of high-purity metals, fuel for nuclear rocket engines for hypersonic transport, missile fuel, cryogenic research.

Industrial uses: Other, Insulators, Fuel agents, Fuel, Reducing agent, Catalyst, Processing aids, specific to petroleum production.

Consumer uses: Fuel agents.

Use classes: Food additives.

Cosmetic ingredient, INCI name HYDROGEN(antioxidant)

Roles

  • additive
  • animal metabolite
  • antioxidant
  • donor
  • electron donor
  • eukaryotic metabolite
  • food additive
  • food component
  • food packaging gas
  • fuel
  • human metabolite
  • mammalian metabolite
  • metabolite
  • physiological role

Functional uses

  • Adhesion/cohesion promoter
  • Antioxidant

Cosmetic functions

  • Antioxidant

How it is made

The main commercial processes for the on-purpose production of hydrogen are steam reforming, partial oxidation (coal, coke, resid), or electrolysis of water. Hydrogen is also commercially produced as a by-product of chemical processes (ethylene crackers, styrene, MTBE etc) or gasoline manufacturing (catalytic reforming).

Obtained by passing water vapors over heated iron, by electrolysis of water or by action of hydrochloric acid or sulfuric acid on iron or zinc, by hydrolysis of metal hydrides.

(1) Reaction of steam with natural gas (steam reforming) and susequent purification, (2) partial oxi

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dation of hydrocarbons to carbon monoxide and interaction of carbon monoxide and steam, (3) gasification of coal, (4) dissociation of ammonia, (5) thermal or catalytic decomposition of hydrocarbons gases, (6) catalytic reforming of naphtha, (7) reaction of iron and steam, (8) catalytic reaction of methanol and steam, (9) electrolysis of water.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 001-001-00-9

Health and food

  • EU cosmetic ingredient inventory
  • Food additive

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Hydrogen is traded under.

HS 2804.10Exact HS code

Hydrogen

World exports in 2024
$159M
āˆ’26.0% vs 2023, imports $200M
2019 to 2024
Top exporters
  1. Canada40.6%
  2. Netherlands17.7%
  3. United States12.5%
Top importers
  1. United States33.7%
  2. Netherlands24.6%
  3. France * partner reported5.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Hydrogen is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Hydrogen, based on the data on this page

What is Hydrogen?

Dihydrogen is an elemental molecule consisting of two hydrogens joined by a single bond. It has a role as an electron donor, an antioxidant, a fuel, a human metabolite and a member of food packaging gas. It is a gas molecular entity, an elemental molecule and an elemental hydrogen.

What is the CAS number of Hydrogen?

The CAS registry number of Hydrogen is 1333-74-0. Other or deprecated CAS numbers: 12184-90-6, 12385-13-6.

What is the molecular formula and weight of Hydrogen?

The molecular formula of Hydrogen is H2 and its molar mass is 2.02 g/mol.

What is Hydrogen used for?

In oxy-hydrogen blowpipe (welding) and limelight, autogenous welding of steel and other metals, manufacturing ammonia, synthetic methanol, HCl, NH3, hydrogenation of oils, fats, naphthalene, phenol, in balloons and airships, in metallurgy to reduce oxides to metals, in petroleum refining, in thermonuclear reactions (iā€¦

Is Hydrogen hazardous?

Hydrogen carries the GHS signal word "Danger". Main hazards: extremely flammable gas. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Hydrogen?

Hydrogen is usually classified under HS code 280410 (Hydrogen). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydrogen?

CompoundList lists 139 suppliers of Hydrogen in United States, South Korea, China, India and 9 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Hydrogen in India?

3 suppliers in India list Hydrogen on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Hydrogen?

Suppliers quote Hydrogen on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Hydrogen

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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