Are Cuprous Chloride and Copper(I) Chloride the same material?

Yes. Both names identify CuCl, CAS 7758-89-6, containing copper in the +1 oxidation state. It is not copper(II) chloride, copper oxychloride or a copper-chloride solution. State Cu(I), the CAS number, physical form and required assay basis in the quotation.

What is Cuprous Chloride used for?

It is used as an industrial catalyst, including routes to acrylonitrile, as a dye and pesticide intermediate, gas absorbent, petroleum desulfurization or decolourizing agent and in selected silicone and dimethyl carbonate processes. State the intended reaction because catalyst and technical grades can differ.

Which batch specifications should be agreed for Cuprous Chloride?

Confirm CuCl assay and method, total copper where used, appearance, acid-insoluble matter, sulfate, iron, calcium, sodium, potassium and any Cu(II) or oxidation-product limit required by the process. ACS, catalyst and technical grades can have different impurity profiles.

What is the typical appearance and solubility of Cuprous Chloride?

Cuprous chloride is normally a white cubic-crystal solid or white powder, but it darkens on exposure to light and turns green as it oxidizes in air. It is only slightly soluble in water, about 0.06 g/L at 25 C, and is not the same material as water-soluble copper(II) chloride.

How should Cuprous Chloride be packed and stored before use?

Confirm sealed moisture-resistant packaging, net weight, inner liner, manufacturing date and the permitted colour range. Cuprous chloride can oxidize during exposure to air and moisture, changing appearance and Cu(I) availability. Define opening, resealing and storage controls.

Cuprous Chloride CAS 7758-89-6

Cuprous chloride (copper(I) chloride, CuCl), CAS 7758-89-6, is an inorganic transition-metal halide used as an organic-synthesis catalyst, including the Sandmeyer reaction and routes to acrylonitrile, and as a dye and pesticide intermediate, gas absorbent and silicone-process catalyst. It oxidizes on exposure to air and moisture, so confirm the CuCl assay, Cu(II) limit, packaging and documentation before ordering; COA, TDS and SDS are available on request.

CAS: 7758-89-6
Synonyms: Cuprous Chloride; Copper(I) Chloride; CuCl; Copper Monochloride
Einecs: 231-842-9
Molecular Formula: CuCl
Grade: Industrial grade, purity ≥98%
Package: Confirm packaging compatible with the offered form and destination requirements.

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Product Description

Cuprous chloride

Synonyms: Cuprous chloride (high activity); Copper monochloride; Copper(I) chloride

Chemical formula: CuCl

Molecular weight: 99.00

CAS number: 7758-89-6

Solubility product (Ksp): 1.72 × 10⁻⁷ (25 °C)

Properties: White cubic crystals or white powder; oxidizes readily (turning green), darkens on exposure to light, and is toxic. Relative density 4.14.

Melting point: 430 °C

Boiling point: 1490 °C (decomposes)

Water solubility: 0.06 g/L (25 °C); slightly soluble in water

Main uses: Industrial catalyst. For example, cuprous chloride catalyzes the addition of acetylene and hydrogen cyanide to produce acrylonitrile. It is used as an absorbent for oxygen and carbon monoxide, as a pesticide intermediate, and as a petroleum desulfurization or decolorizing agent.

Downstream products: Used in the production of Direct Blue 86 dye, as a pesticide intermediate, and as a catalyst for acrylonitrile, ethylene, acetylene and chloroprene production. It is used to synthesize diphenyl ether, as a catalyst with dimethylamine, in silicone production, and in the oxidative carbonylation of methanol to dimethyl carbonate.

FAQ - Technical & Supply Chain

Q:
Are Cuprous Chloride and Copper(I) Chloride the same material?

A: Yes. Both names identify CuCl, CAS 7758-89-6, containing copper in the +1 oxidation state. It is not copper(II) chloride, copper oxychloride or a copper-chloride solution. State Cu(I), the CAS number, physical form and required assay basis in the quotation.
Q:
What is Cuprous Chloride used for?

A: It is used as an industrial catalyst, including routes to acrylonitrile, as a dye and pesticide intermediate, gas absorbent, petroleum desulfurization or decolourizing agent and in selected silicone and dimethyl carbonate processes. State the intended reaction because catalyst and technical grades can differ.
Q:
Which batch specifications should be agreed for Cuprous Chloride?

A: Confirm CuCl assay and method, total copper where used, appearance, acid-insoluble matter, sulfate, iron, calcium, sodium, potassium and any Cu(II) or oxidation-product limit required by the process. ACS, catalyst and technical grades can have different impurity profiles.
Q:
What is the typical appearance and solubility of Cuprous Chloride?

A: Cuprous chloride is normally a white cubic-crystal solid or white powder, but it darkens on exposure to light and turns green as it oxidizes in air. It is only slightly soluble in water, about 0.06 g/L at 25 C, and is not the same material as water-soluble copper(II) chloride.
Q:
How should Cuprous Chloride be packed and stored before use?

A: Confirm sealed moisture-resistant packaging, net weight, inner liner, manufacturing date and the permitted colour range. Cuprous chloride can oxidize during exposure to air and moisture, changing appearance and Cu(I) availability. Define opening, resealing and storage controls.

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