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Product Code M2299C1-500mg
Price £380 ex. VAT

Low price, high purity gallium sulfide powder and crystals

Suitable for use a semiconductor, photodetectors, and in UV light-emitting diodes


Technical Data | MSDS | Structure | Literature and Reviews | Related Products | Resources and Support


Gallium sulfide (GaS), CAS number 12024-10-1, is a layered semiconductor and it belongs to group XIII post-transitional mono-chalcogenide. In gallium sulfide each individual layer consists of covalently-bonded S−Ga−Ga−S stacks with sheets of S ions on the top and bottom and two sheets of Ga ions in the middle.

Unlike GaSe and many other monochalcogenides, bulk GaS (α-GaS phase) possesses a much larger indirect band gap of ∼2.6 eV, with the potential to increases up to more than 3.0 eV by decreasing film thickness due to quantum confinement effects. Therefore, 2D GaS is believed to fill the the gap between 2D small-band-gap semiconductors and insulators.

High Purity Gallium Sulfide

High Purity

High purity Gallium Sulfide ≥99.995% powder

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Worldwide shipping

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Low price Gallium Sulfide

Low price

Low price Gallium Sulfide

powder and crystals 12024-10-1

Different Forms

Available in powder and crystals

Hexagonal (2H phase) β-GaS is the energetically favourable crystal arrangement among the four GaS polytypes. Like all other layered 2D structures, adjacent GaS layers are bound by the weak van der Waals force along the c-axis. This makes it possible to peel the structure by mechanical or liquid exfoliation. The resultant ultra-thin few or single layer 2D gallium sulfide nanosheets or nanoparticles can be employed in innovative photoelectrochemical (PEC)-type UV-selective photodetectors for medical diagnostics, air purification, chemical analysis, and advanced optical communication system.

We supply high purity gallium sulfide powder and crystals. Orders are shipped worldwide.

Gallium sulfide powder

Gallium Sulfide Powder

Can be used in electronic and optical devices and in the preparation of GaS nanosheets or nanoparticles liquid chemical exfoliation or chemical vapour deposition

Available in quantities of 500 mg or 1 g

≥99.995% purity

From £380

Gallium sulfdie crystals

Gallium Sulfide Crystals by Size

Can be used as a semiconductor, in photoelectrochemical cells, and to produce 2D monolayer and few-layer GaS by mechanical or liquid exfoliation

Small (>10 mm2) or medium (>25 mm2) available*

≥99.999% purity

From £900

*Typical representative size, areas/dimensions may vary.

Technical Data

CAS Number 12024-10-1
Chemical Formula GaS
Molecular Weight 101.79 g/mol
Bandgap ~2.59 eV (indirect)
Electrical Properties Semiconductor
Crystal Structure Hexagonal
Synonyms Gallium(II) sulfide, Gallium(II) sulphide
Melting Point 965 °C
Classification / Family Transition metal monochalcogenides (TMMCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Photovoltaic, Materials science
Preparation Synthetic - Chemical Vapour Transport (CVT)
Colour Yellow

Product Details

Form Purity
Powder ≥99.995%
Crystal ≥99.999%

Pricing Table

Product Code Form Quantity Price
M2299C1 Powder 500 mg £380
M2299C1 Powder 1 g £500
M2299A10 Crystal Small (α-GaS, ≥10 mm2) £900 ea.
M2299A25 Crystal Medium (α-GaS, ≥25 mm2) £1250 ea.

*typical representative size, areas/dimensions may vary.

MSDS Documents


Gallium sulfide powder MSDSGallium sulfide powder

Gallium sulfide crystal MSDSGallium sulfide crystal

Structure of Bulk and 2D Gallium Sulfide


Gallium sulfide (GaS) has a hexagonal-layered structure. Each individual layer consists of four sheets of atoms in the sequence 'S-Ga-Ga-S'.

Each Ga atom is tetragonally-coordinated to three S atoms and one Ga atom. Strong bonding between two sheets within the individual layer is thought to be covalent in nature, with some ionic contribution.

gallium sulfide crystal structure
The crystal structure of hexagonal gallium sulfide (GaS), CAS 12024-10-1

Depending on the sequence of stacking, the two most important classifications are α-GaS and β-GaS. Both α-GaS and β-GaS are hexagonal structured.

Literature and Reviews


  • Two-Dimensional Gallium Sulfide Nanoflakes for UV Selective Photoelectrochemical-type Photodetectors, M. Zappia et al., J. Phys. Chem. C, 125, 11857−11866 (2021); DOI: 10.1021/acs.jpcc.1c03597.
  • Preparation of Gallium Sulfide Nanosheets by Liquid Exfoliation and Their Application As Hydrogen Evolution Catalysts, A. Harvey et al., Chem. Mater. 2015, 27, 3483−3493 (2015); DOI: 10.1021/acs.chemmater.5b00910.
  • Large-Area Growth and Stability of Monolayer Gallium Monochalcogenides for Optoelectronic Devices, T. Afaneh et al., ACS Appl. Nano Mater. 3, 8, 7879–7887 (2020); DOI: 10.1021/acsanm.0c01369.


We stock a wide range of 2D materials available to purchase online. Please contact us if you cannot find what you are looking for.

Resources and Support


Viscoelastic Transfer of 2D Material Using PDMS

Viscoelastic transfer using polydimethylsiloxane (PDMS) stamps is one of the methods used for the deterministic placement of 2D materials and the fabrication of van der Waals heterostructures. It relies on the viscoelasticity of PDMS, which behaves as an elastic solid on short time scales, but as a viscous fluid on long time scales.

Learn more...
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