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Metals, alloys and elements

Gallium

Also known as Gallium Metallicum, Ga, gallium atom

CAS 7440-55-3Formula GaMolar mass 69.72 g/molEC 231-163-8
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 65 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Appearance
Grayish metal, possesses a greenish-blue reflection or silver-like when molten, has a cr…
Melting point
29.8 °C
Boiling point
Ca. 2400
Density
6.0947 @ 29.8 °C (liquid), 5.9037 @ 29.65 °C (solid)
Solubility
Sol in acid, alkali, slightly sol in mercury
HS code
811292
Category
Metals, alloys and elements
UN number
UN 2803
Illustrative photo, off-white crystalline powder with an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Gallium?

Plain description, key identifiers and synonyms

Gallium atom is a metallic element predicted as eka-aluminium by Mendeleev in 1870 and discovered by Paul-Emile Lecoq de Boisbaudran in 1875. Named in honour of France (Latin Gallia) and perhaps also from the Latin gallus cock, a translation of Lecoq. It is a post-transition metal atom and a boron group element atom.

Gallium is a chemical element with symbol Ga and atomic number 31.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
gallium
CAS number
7440-55-3 CAS number cross-checkedOther or deprecated CAS: 223569-31-1
EC number
231-163-8
Molecular formula
Ga
UNII
CH46OC8YV4
MDL number
MFCD00134045
InChIKey
GYHNNYVSQQEPJS-UHFFFAOYSA-N
InChI
InChI=1S/Ga
SMILES (canonical and isomeric)
[Ga]

Synonyms

  • Gallium Metallicum
  • Ga
  • gallium atom
  • galio
  • Gallium ingot
  • Gallium metal
  • Gallium pellets, 6mm dia
  • Gallium69
  • Gallium, elemental
  • Gallium(1+)
  • Gallium metal, packaged in poylethylene bottle
  • Gallium, ion (Ga1+)
  • Atomic Gallium
  • Element Gallium
  • Element:Gallium
  • Gallium Standard: Ga @ 1000 microg/mL in 5% HNO3, 0.5% HCl
  • Gallium Standard: Ga @ 10000 microg/mL in 5% HNO3, 0.5% HCl
  • Element-Ga
  • Element:Ga
  • Gallium (atomic)
  • Ga (element)
  • Gallium (element)
  • Gallium element
  • Gallium, elementsl
  • Gallium [UN2803] [Corrosive]
Show all 35 synonyms
  • Gallium, 99.99% trace metals basis
  • Gallium, 99.999% trace metals basis
  • Gallium, 99.9995% trace metals basis
  • AA standard GALLIUM 1M HCL 1000 ppm
  • AA standard GALLIUM 1M HCL 10000 ppm
  • Gallium metal, 99.9995% trace metals grade
  • Isotopic standard for gallium, NIST SRM 994
  • Gallium, pieces, 99.99999% trace metals basis
  • ICP standard Gallium 2-5% HNO3 1000 microg/mL
  • Gallium - Ga @ 1000 microg/mL in 5% HNO3, 0.5% HCl

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
Grayish metal, possesses a greenish-blue reflection or silver-like when molten, has a crystalline ortho-rhombic textureexp.
Melting point
29.8 °Cexp.
Boiling point
Ca. 2400exp.
Density
6.0947 @ 29.8 °C (liquid), 5.9037 @ 29.65 °C (solid)exp.
Solubility
Sol in acid, alkali, slightly sol in mercuryexp.
Vapour pressure
1 Pa @ 1037 °C, 10 Pa @ 1175 °C, 100 Pa @ 1347 °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
69.72 g/molcalc.
Exact mass
68.9256 Dacalc.
LogP (octanol/water)
-0.38calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
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
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H290May be corrosive to metals.
  • H302Harmful if swallowed.
  • H314Causes severe skin burns and eye damage.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (19)
  • P234Keep only in original packaging.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P363Wash contaminated clothing before reuse.
  • P390Absorb spillage to prevent material damage.
  • P405Store locked up.
  • P406Store in a corrosion resistant container with a resistant inner liner.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2803
Transport hazard class
8
Packing group
III

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

Gallium suppliers

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All 65 suppliers
30 of 30 offers

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Where suppliers are based

65 suppliers in 15 countries

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Gallium price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

The metal has no significant commercial uses, its compounds are used as semiconductors.

High temperature thermometers, in solid-state devices such as transistors, and in dental alloys.

Industrial uses: Alloys, Other.

Consumer uses: Other, Alloys.

Pharmacology

Gallium is an element with atomic symbol Ga, atomic number 31, and atomic weight 69.7. A rare silvery (usually trivalent) metallic element, brittle at low temperatures but liquid above room temperature, occurs in trace amounts in bauxite and zinc ores.

How it is made

Extraction of gallium as gallium by ethyl ether or isopropyl ether and subsequent electrodeposition from an alkaline gallium oxide solution.

The metal is recovered by controlled electrolysis of the concentrated alkaline liquors that are by-products of the extraction of aluminum and zinc from their ores, purification of bauxite by Bayer process results in the concentration of gallium in the alkaline solutions of an aluminum: gallium ratio of 5000:300, electrolysis using a mercury electrode gives a further concentration and further electrolysis using a stainless-steel cathode of the resulting sodium gallate affords liquid gallium metal.

Ultrapure (99.9999%) gallium for semiconductor electronics is obtained by repeated fractional crystallization of the metal.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

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 Gallium is traded under.

HS 8112.92Indicative HS code

Articles thereof, unwrought, including waste and scrap, powders

Our trade statistics cover HS chapters 25 to 40 (minerals, chemicals, plastics and rubber). This code is in chapter 81, metals, which is not included yet.

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

The HS code shown for Gallium is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Gallium?

Gallium atom is a metallic element predicted as eka-aluminium by Mendeleev in 1870 and discovered by Paul-Emile Lecoq de Boisbaudran in 1875. Named in honour of France (Latin Gallia) and perhaps also from the Latin gallus cock, a translation of Lecoq. It is a post-transition metal atom and a boron group element atom.

What is the CAS number of Gallium?

The CAS registry number of Gallium is 7440-55-3. Other or deprecated CAS numbers: 223569-31-1.

What is the molecular formula and weight of Gallium?

The molecular formula of Gallium is Ga and its molar mass is 69.72 g/mol.

What is Gallium used for?

The metal has no significant commercial uses, its compounds are used as semiconductors. High temperature thermometers, in solid-state devices such as transistors, and in dental alloys. Industrial uses: Alloys, Other. Consumer uses: Other, Alloys.

Is Gallium hazardous?

Gallium carries the GHS signal word "Danger". Main hazards: may be corrosive to metals, harmful if swallowed, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Gallium?

Gallium is usually classified under HS code 811292 (Unwrought, waste and scrap, powders). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Gallium?

CompoundList lists 65 suppliers of Gallium in United States, China, Germany, Spain and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Gallium in India?

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

What is the price of Gallium?

Suppliers quote Gallium 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 Gallium

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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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