Substance profile
Copper oxide (Cu2O)
Copper oxide (Cu2O) is red-brown cubic crystals.
01 · Identification
What Copper oxide (Cu2O) is
Copper oxide (Cu2O) is red-brown cubic crystals. It boils at 1800 °C, melts at 1235 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Copper oxide (Cu2O) identifiers and molecular data
Copper oxide (Cu2O) CAS number and EC number
Other names for Copper oxide (Cu2O)
- dicopper oxide
- copper (I) oxide
03 · GHS classification
Copper oxide (Cu2O) hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Copper oxide (Cu2O) pictograms and signal word
Copper oxide (Cu2O) hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
| 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 oxide (Cu2O) hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
| H318 | Causes serious eye damage. |
| 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 oxide (Cu2O). 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 oxide (Cu2O)
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 oxide (Cu2O) 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 oxide (Cu2O) precautionary statements
CLP Annex VI assigns 14 precautionary statements to Copper oxide (Cu2O). 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 oxide (Cu2O) 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 | димеден оксид меден(I) оксид |
| Spanish español | Óxido de dicobre óxido de cobre (I) |
| Czech čeština | oxid měďný |
| Danish dansk | dikobberoxid kobber(I)oxid |
| German Deutsch | Dikupferoxid Kupfer(I)-oxid |
| Estonian eesti | divaskoksiid vask(I)oksiid |
| Greek ελληνικά | οξείδιο του διχαλκού οξείδιο του χαλκού (Ι) |
| English English | dicopper oxide copper (I) oxide |
| French français | oxyde de dicuivre oxyde de cuivre (I) |
| Croatian hrvatski | dibakrov oksid bakar(I) oksid |
| Italian italiano | ossido di dirame ossido di rame (I) |
| Latvian latviešu | divara oksīds vara(I) oksīds |
| Lithuanian lietuvių | divario oksidas vario (I) oksidas |
| Hungarian magyar | diréz-oxid réz (I)-oxid |
| Maltese Malti | ossidu tad-diram ossidu (I) tar-ram |
| Dutch Nederlands | dikoperoxide koper(I)oxide |
| Polish polski | tlenek dimiedzi tlenek miedzi(I) |
| Portuguese português | óxido de dicobre óxido de cobre (I) |
| Romanian română | oxid dicupric oxid de cupru (I) |
| Slovak slovenčina | oxid meďný, oxid meďný |
| Slovenian slovenščina | dibakrov oksid bakrov (I) oksid |
| Finnish suomi | dikuparioksidi kupari(I)oksidi |
| Swedish svenska | dikopparoxid koppar(I)oxid |
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 oxide (Cu2O) GHS label elements
Everything CLP Annex VI fixes for Copper oxide (Cu2O), laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Copper oxide (Cu2O)
- Harmful if inhaled.
- Harmful if swallowed.
- Causes serious eye damage.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF INHALED:
- IF IN EYES:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Remove contact lenses, if present and easy to do. Continue rinsing.
- 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 oxide (Cu2O) in the GHS label constructor →
07 · Health hazards
Copper oxide (Cu2O) health hazards and exposure limits
Copper oxide (Cu2O) hazard summary
An eye and respiratory tract irritant; Can cause metal fume fever after inhalation and injury to the liver and kidneys after ingestion; [ICSC] Copper-induced metal fume fever is not as common as zinc-induced because of the higher temperature required to produce copper oxide. (Zn mp = 419.5; Cu mp = 1083 deg C.) 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] Slowly oxidized by moist air to cupric oxide; [Merck Index] An eye irritant; Toxic by ingestion; [Sigma-Aldrich MSDS] See Copper.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Copper oxide (Cu2O) 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 oxide (Cu2O) 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 oxide (Cu2O) boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 1800 °C (3272 °F) | HSDB |
Copper oxide (Cu2O) melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 1235 °C (2255 °F) | HSDB | |
| 1232 °C (2249.6 °F) | ICSC |
Copper oxide (Cu2O) density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 6 g/cm³ | HSDB |
Copper oxide (Cu2O) solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | PRACTICALLY INSOLUBLE IN ORGANIC SOLVENTS; SOL IN DILUTE MINERAL ACIDS, SOLN OF AMMONIA & ITS SALTS. | HSDB |
Copper oxide (Cu2O) vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | Negligible | HSDB |
Copper oxide (Cu2O) corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | CORRODES ALUMINUM | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Source notes
Further notes on Copper oxide (Cu2O)
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
Crimson, scarlet, vermilion, deep or brownish-red, secondary mineral; adamantine or dull luster; brownish red streak; sol in nitric and concentrated hydrochloric acids; specific gravity: 5.85-6.15; Mohs hardness: 3.5-4 /Cuprite/
Source: HSDB
Soluble in ammonium hydroxide; in hydrochloric acid forming copper(I) chloride which dissolves in excess hydrochloric acid; with dil sulfuric acid or dil nitric acid the cupric salt is formed and half copper is pptd as the metal.
Source: HSDB
10 · Handling and storage
Copper oxide (Cu2O) storage and handling
Copper oxide (Cu2O) safe storage
Separated from aluminium. See Chemical Dangers. Store in an area without drain or sewer access. Store only in original packaging.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Copper oxide (Cu2O) storage conditions
HANDLE WITHOUT SPILLAGE & STORE IN DRY, COOL PLACE.
Source: Hazardous Substances Data Bank (HSDB)
Copper oxide (Cu2O) incompatible materials
Heated interaction to produce metallic copper is violent.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Copper oxide (Cu2O) in the storage compatibility matrix →
11 · Questions
Copper oxide (Cu2O) — frequently asked questions
What is the CAS number of Copper oxide (Cu2O)?
The CAS number of Copper oxide (Cu2O) is 1317-39-1. Its EC number is 215-270-7.
What does a Copper oxide (Cu2O) label have to show?
Under CLP Annex VI the label for Copper oxide (Cu2O) carries the pictograms Exclamation mark, Corrosion and Environment and the signal word is Danger.
Is Copper oxide (Cu2O) flammable?
CLP Annex VI assigns Copper oxide (Cu2O) 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 oxide (Cu2O) a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Copper oxide (Cu2O). 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 oxide (Cu2O)?
The US occupational exposure limit reported for Copper oxide (Cu2O) 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 oxide (Cu2O)?
The boiling point reported for Copper oxide (Cu2O) is 1800 °C (3272 °F) (HSDB).
What is the melting point of Copper oxide (Cu2O)?
The melting point reported for Copper oxide (Cu2O) is 1235 °C (2255 °F) (HSDB).
How should Copper oxide (Cu2O) be stored?
HANDLE WITHOUT SPILLAGE & STORE IN DRY, COOL PLACE. (Hazardous Substances Data Bank (HSDB))
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