Substance profile
Cobalt sulfide
Cobalt sulfide is a black amorphous powder.
01 · Identification
What Cobalt sulfide is
Cobalt sulfide is a black amorphous powder. It melts at 1117 °C, is practically insoluble in water.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Cobalt sulfide identifiers and molecular data
Cobalt sulfide CAS number and EC number
03 · GHS classification
Cobalt sulfide hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Cobalt sulfide pictograms and signal word
Cobalt sulfide hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | 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 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Cobalt sulfide hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Cobalt sulfide. 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 Cobalt sulfide
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 Cobalt sulfide 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
Cobalt sulfide precautionary statements
CLP Annex VI assigns 8 precautionary statements to Cobalt sulfide. 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
Cobalt sulfide 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 | кобалтов сулфид |
| Spanish español | Sulfuro de cobalto |
| Czech čeština | sulfid kobaltnatý |
| Danish dansk | cobaltsulfid |
| German Deutsch | Cobaltsulfid |
| Estonian eesti | koobaltsulfiid |
| Greek ελληνικά | θειούχο κοβάλτιο |
| English English | cobalt sulfide |
| French français | sulfure de cobalt |
| Croatian hrvatski | kobaltov sulfid |
| Italian italiano | solfuro di cobalto |
| Latvian latviešu | kobalta sulfīds |
| Lithuanian lietuvių | kobalto sulfidas |
| Hungarian magyar | kobalt-szulfid |
| Maltese Malti | sulfur tal-kobalt |
| Dutch Nederlands | kobaltsulfide |
| Polish polski | siarczek kobaltu(II) |
| Portuguese português | sulfureto de cobalto |
| Romanian română | sulfură de cobalt |
| Slovak slovenčina | sulfid kobaltnatý |
| Slovenian slovenščina | kobaltov sulfid |
| Finnish suomi | kobolttisulfidi |
| Swedish svenska | koboltsulfid |
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
Cobalt sulfide GHS label elements
Everything CLP Annex VI fixes for Cobalt sulfide, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Cobalt sulfide
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- Get medical advice/attention.
- If skin irritation or rash occurs:
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Cobalt sulfide in the GHS label constructor →
07 · Health hazards
Cobalt sulfide health hazards and exposure limits
Cobalt sulfide hazard summary
May cause skin sensitization and asthma after prolonged contact; [ICSC] See Cobalt.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Cobalt sulfide carcinogenicity classification
... There is limited evidence for the carcinogenicity of cobalt(II) sulfide in experimental animals. ... Overall Evaluation: Cobalt and cobalt compounds are possibly carcinogenic to humans (Group 2B). /Cobalt and cobalt compounds/
Source: Hazardous Substances Data Bank (HSDB)
There is inadequate evidence for the carcinogenicity of cobalt and cobalt compounds in humans. There is sufficient evidence for the carcinogenicity of cobalt metal powder in experimental animals. There is limited evidence for the carcinogenicity of metal alloys containing cobalt, chromium and molybdenum in experimental animals. ... Overall Evaluation: Cobalt and cobalt compounds are possibly carcinogenic to humans (Group 2B). /Cobalt and cobalt compounds/
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
08 · Physical and chemical properties
Cobalt sulfide 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.
Cobalt sulfide melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 1117 °C (2042.6 °F) | HSDB | |
| 1116 °C (2040.8 °F) | above this value | ICSC |
Cobalt sulfide density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 5.45 g/cm³ | HSDB | |
| 5.5 g/cm³ | ICSC |
Cobalt sulfide solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Insoluble in water | HSDB | |
| 0.00038 g/100 cc H2O at 18 °C | at 18 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Source notes
Further notes on Cobalt sulfide
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
Using OECD Guideline 105 (Water Solubility), the water solubility of cobalt monosulfide at 21 to 23 °C and pH 6 varied with loading concentration and dissolution time. Under the conditions of this test, the dissolution of CoS is 103.7 ug/L for a 28-day endpoint (1 mg/L loading), 11362.4 ug/L for a 7-day endpoint (10 mg/L loading) and 7666.8 ug/L for a 7-day endpoint (100 mg/L loading).
Source: HSDB
10 · Handling and storage
Cobalt sulfide storage and handling
Cobalt sulfide safe storage
Separated from strong oxidants.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Planning storage for a mix of chemicals? Check Cobalt sulfide in the storage compatibility matrix →
11 · Questions
Cobalt sulfide — frequently asked questions
What is the CAS number of Cobalt sulfide?
The CAS number of Cobalt sulfide is 1317-42-6. Its EC number is 215-273-3.
What does a Cobalt sulfide label have to show?
Under CLP Annex VI the label for Cobalt sulfide carries the pictograms Exclamation mark and Environment and the signal word is Warning.
Is Cobalt sulfide flammable?
CLP Annex VI assigns Cobalt sulfide 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 Cobalt sulfide a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Cobalt sulfide. 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. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the melting point of Cobalt sulfide?
The melting point reported for Cobalt sulfide is 1117 °C (2042.6 °F) (HSDB).
Nearby
Substances next to Cobalt sulfide
Keep going: substances starting with C, or search the whole database by name, CAS number, pictogram or signal word.