Copper(I) selenide, 99.95% trace metals basis 20405-64-5

Name: Copper(I) selenide, 99.95% trace metals basis
Brand: Vaqora Chemicals
SKU: VQ-014601

About Copper(I) selenide, 99.95% trace metals basis

Listed under CAS 20405-64-5, Copper(I) selenide is a transition metal compound available from Vaqora Chemicals with a typical assay of 99.95%. The compound has the formula Cu2Se, corresponding to a molecular weight of 206.06 g/mol. Common synonyms include Cuprous selenide and Dicopper selenide.

The material typically appears as very dark blue to black powder or chunks. Key physical data: a density of 6.84 g/mL at 25 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Key uses span paints, coatings and inks, optics and photonics and solar and photovoltaic research. It is used across academic and industrial research.

We offer Copper(I) selenide in 5 g and 25 g packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Paints, coatings & inks
Optics & photonics
Solar & photovoltaic research

Industries

Specifications & identifiers

Chemical identifiers
Product name	Copper(I) selenide, 99.95% trace metals basis
Catalogue No.	VQ-014601
CAS Number	20405-64-5
Molecular formula	Cu₂Se
Molecular weight	206.06 g/mol
Exact mass	205.7757
Purity / assay	99.95%
HSN code	28429090
InChIKey	KTLOQXXVQYUCJU-UHFFFAOYSA-N
SMILES	[Cu].[Cu].[Se]
PubChem CID	6914519

Physical properties
Physical form	Powder
Appearance	Very dark blue to black powder or chunks
Density	6.84 g/mL at 25 °C
H-bond donors / acceptors	0 / 0
TPSA	0 Å²
Synonyms	Cuprous selenide, Dicopper selenide, Dicopper monoselenide, Copper selenide (Cu2Se), Copper (I) selenide, Copper(I) selenide, 99.95% trace metals basis

Safety & hazard information (GHS)

Toxic

Health hazard

Environmental hazard

Signal word: Danger

Hazard statements

H301Toxic if swallowed
H331Toxic if inhaled
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary statements: P260, P261, P264, P270, P271, P273, P301 + P316, P304 + P340, P316, P319, P321, P330, P391, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Copper(I) selenide, 99.95% trace metals basis?

The CAS Registry Number of Copper(I) selenide, 99.95% trace metals basis is 20405-64-5. It is also known as Cuprous selenide, Dicopper selenide, Dicopper monoselenide.

What is the molecular formula and molecular weight of Copper(I) selenide, 99.95% trace metals basis?

Copper(I) selenide, 99.95% trace metals basis has the molecular formula Cu2Se and a molecular weight of 206.06 g/mol.

Which grade and pack sizes of Copper(I) selenide, 99.95% trace metals basis can I order?

We supply Copper(I) selenide, 99.95% trace metals basis in (99.95%) grade, in 5 g, 25 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Copper(I) selenide, 99.95% trace metals basis?

Yes. Every lot of Copper(I) selenide, 99.95% trace metals basis is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Copper(I) selenide, 99.95% trace metals basis be shipped internationally?

Yes. Copper(I) selenide, 99.95% trace metals basis is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.