Substance profile
Copper chloride
Copper chloride: dry Powder; Liquid.
01 · Identification
What Copper chloride is
Copper chloride: dry Powder; Liquid. Its molecular formula is ClCu and its molecular weight is 99 g/mol. It boils at 1490 °C, melts at 423 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Copper chloride identifiers and molecular data
Copper chloride CAS number and EC number
Copper chloride molecular formula and molecular weight
Other names for Copper chloride
- copper (I) chloride
- cuprous chloride
03 · GHS classification
Copper chloride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Copper chloride pictograms and signal word
Copper chloride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | GHS09 |
Copper chloride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Copper chloride. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Copper chloride
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Copper chloride issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Copper chloride precautionary statements
CLP Annex VI assigns 7 precautionary statements to Copper chloride. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Copper chloride name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | меден хлорид меден(I) хлоридкупрохлорид |
| Spanish español | Cloruro de cobre cloruro de cobre (I)cloruro cuproso |
| Czech čeština | chlorid měďný |
| Danish dansk | kobberchlorid kobber(I)chlorid |
| German Deutsch | Kupferchlorid Kupfer(I)-chlorid |
| Estonian eesti | vaskkloriid vask(I)kloriid |
| Greek ελληνικά | χλωριούχος χαλκός χλωριούχος χαλκός(I)χλωριούχος υποχαλκός |
| English English | copper chloride copper (I) chloridecuprous chloride |
| French français | chlorure de cuivre chlorure de cuivre (I)chlorure cuivreux |
| Croatian hrvatski | bakrov klorid bakrov(I) kloridbakreni klorid |
| Italian italiano | cloruro di rame |
| Latvian latviešu | vara hlorīds vara(I) hlorīdsvara(II) hlorīds |
| Lithuanian lietuvių | vario chloridas vario (I) chloridasvario (II) chloridas |
| Hungarian magyar | réz-klorid réz(I)-klorid |
| Maltese Malti | klorur tar-ram klorur tar-ram (I)klorur kupruż |
| Dutch Nederlands | koperchloride koper(I)chloridekopermonochloride |
| Polish polski | chlorek miedzi(I) chlorek miedziawy |
| Portuguese português | cloreto de cobre cloreto de cobre(I)cloreto cuproso |
| Romanian română | clorură de cupru clorură de cupru (I)clorură cuproasă |
| Slovak slovenčina | chlorid meďný chlorid meďný chlorid meďný |
| Slovenian slovenščina | bakrov klorid bakrov(I) klorid |
| Finnish suomi | kuparikloridi kupari(I)kloridikuparimonokloridi |
| Swedish svenska | kopparklorid koppar(I)kloridkopparmonoklorid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Copper chloride GHS label elements
Everything CLP Annex VI fixes for Copper chloride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Copper chloride
- Harmful if swallowed.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- IF SWALLOWED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Copper chloride in the GHS label constructor →
07 · Health hazards
Copper chloride health hazards and exposure limits
Copper chloride hazard summary
Harmful if swallowed; [MSDSonline] Acute copper poisoning after ingestion can cause liver injury, methemoglobinemia, and hemolytic anemia. Acute renal failure may result, secondary to massive hemoglobinuria. [Goldfrank, p. 1259] Classified as category I for skin and eye irritation (corrosive); Category II for acute oral and dermal exposure (moderate toxicity); Category III for acute inhalation exposure (low toxicity); Positive results in dermal sensitization studies; [Reference #2] May cause irritation; Harmful by ingestion; [Alfa Aesar MSDS] See Copper.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Copper chloride occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 1.0 [mg/m3], as Cu | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 100.0 [mg/m3], as Cu | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Copper chloride properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Copper chloride boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 1490 °C (2714 °F) | at 760 mmHg | DOE PAC |
Copper chloride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 423 °C (793.4 °F) | DOE PAC |
Copper chloride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 4.14 g/cm³ | at 25 °C | DOE PAC |
Copper chloride vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1 mmHg | at 546 °C | DOE PAC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Transport
Copper chloride UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Copper chloride under UN 2802 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| COPPER CHLORIDE | 8 | C2 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 8 is “Corrosive substances” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Copper chloride | 8 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 8 is “Corrosive material” (49 CFR 173.2).
10 · Questions
Copper chloride — frequently asked questions
What is the CAS number of Copper chloride?
The CAS number of Copper chloride is 7758-89-6. Its EC number is 231-842-9.
What is the chemical formula of Copper chloride?
The molecular formula of Copper chloride is ClCu and its molecular weight is 99 g/mol.
What does a Copper chloride label have to show?
Under CLP Annex VI the label for Copper chloride carries the pictograms Exclamation mark and Environment and the signal word is Warning.
Is Copper chloride flammable?
CLP Annex VI assigns Copper chloride no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Copper chloride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Copper chloride. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for Copper chloride?
The US occupational exposure limit reported for Copper chloride is 1.0 [mg/m3], as Cu (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Copper chloride?
The boiling point reported for Copper chloride is 1490 °C (2714 °F), at 760 mmHg (DOE PAC).
What is the melting point of Copper chloride?
The melting point reported for Copper chloride is 423 °C (793.4 °F) (DOE PAC).
Nearby
Substances next to Copper chloride
Keep going: substances starting with C, or search the whole database by name, CAS number, pictogram or signal word.