Substance profile
Barium peroxide
Barium peroxide is a white or grayish-white, heavy powder and is odorless.
01 · Identification
What Barium peroxide is
Barium peroxide is a white or grayish-white, heavy powder and is odorless. It boils at 800 °C, melts at 450 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Barium peroxide identifiers and molecular data
Barium peroxide CAS number and EC number
03 · GHS classification
Barium peroxide hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Barium peroxide pictograms and signal word
Barium peroxide hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Oxidising liquids or Oxidising solids | Category 2 or 3 | H272 | GHS03 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
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.
Barium peroxide hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H272 | May intensify fire; oxidiser. |
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
This page lists only the codes assigned to Barium peroxide. 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 Barium peroxide
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 Barium peroxide 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
Barium peroxide precautionary statements
CLP Annex VI assigns 7 precautionary statements to Barium peroxide. 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.
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
Barium peroxide 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 | бариев пероксид |
| Spanish español | Peróxido de bario |
| Czech čeština | peroxid barnatý |
| Danish dansk | bariumperoxid |
| German Deutsch | Bariumperoxid |
| Estonian eesti | baariumperoksiid |
| Greek ελληνικά | υπεροξείδιο του βαρίου |
| English English | barium peroxide |
| French français | peroxyde de baryum |
| Croatian hrvatski | barijev peroksid |
| Italian italiano | perossido di bario |
| Latvian latviešu | bārija peroksīds |
| Lithuanian lietuvių | bario peroksidas |
| Hungarian magyar | bárium-peroxid |
| Maltese Malti | perossidu tal-barju |
| Dutch Nederlands | bariumperoxide |
| Polish polski | nadtlenek baru(II) |
| Portuguese português | peróxido de bário |
| Romanian română | peroxid de bariu |
| Slovak slovenčina | peroxid bárnatý |
| Slovenian slovenščina | barijev peroksid |
| Finnish suomi | bariumperoksidi |
| Swedish svenska | bariumperoxid |
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
Barium peroxide GHS label elements
Everything CLP Annex VI fixes for Barium peroxide, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Barium peroxide
- May intensify fire; oxidiser.
- Harmful if inhaled.
- Harmful if swallowed.
- 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.
- IF SWALLOWED:
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Barium peroxide in the GHS label constructor →
07 · Health hazards
Barium peroxide health hazards and exposure limits
Barium peroxide hazard summary
A skin, eye, and respiratory tract irritant; May cause CNS effects; Exposure could cause hypokalemia, resulting in cardiac disorders and muscular disorders. [ICSC] Reacts violently with water releasing energy; An irritant; [MSDSonline] See Barium.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Barium peroxide 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.
Barium peroxide boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 800 °C (1472 °F) | decomposes, decomposes | HSDB |
Barium peroxide melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 450 °C (842 °F) | HSDB |
Barium peroxide density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 4.96 g/cm³ | HSDB | |
| 5 g/cm³ | ICSC | ||
| 4.96 g/cm³ | at 20 °C | CAMEO |
Barium peroxide solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility in water: poor | ICSC | |
| 0.091 g/100 g water at 20 °C | at 20 °C | HSDB |
Barium peroxide lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Risk of fire and explosion on contact with combustible substances and reducing agents. | HSDB | |
| Fire and explosion risk in contact with organic materials. | HSDB | ||
| Explodes on contact with acetic anhydride. | HSDB |
Barium peroxide corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Corrodes metal slowly | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Barium peroxide fire and explosion behaviour
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.
Barium peroxide fire potential
Not combustible but enhances combustion of other substances.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Barium peroxide storage and handling
Barium peroxide safe storage
Separated from combustible substances, reducing agents and food and feedstuffs. Dry.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Barium peroxide storage conditions
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage and moisture. Separate from incompatibilities. Separate from combustibles, organic or other readily oxidizable materials. Avoid storage on wood floors. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.
Source: Hazardous Substances Data Bank (HSDB)
Barium peroxide incompatible materials
The substance is a strong oxidant and reacts violently with combustible and reducing materials.
Source: Hazardous Substances Data Bank (HSDB)
Barium peroxide reactivity
BARIUM PEROXIDE is a strong oxidizing agent. Contact with water can produce a temperature and oxygen concentration high enough to ignite organic materials [Bretherick's, 5th ed., 1995, p. 94]. Reacts explosively with acetic anhydride due to the formation of acetyl peroxide [Rust, 1948, p. 337]. Ignites when mixed with powdered aluminum, powdered magnesium or calcium-silicon alloys. Wood may ignite with friction from the peroxide. Decomposes when heated to 700 °C to produce barium oxide and pure oxygen [Sax, 9th ed., 1996, p. 317]. Forms highly reactive mixtures with fuel-type materials.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Barium peroxide in the storage compatibility matrix →
11 · Transport
Barium peroxide 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.
Barium peroxide under UN 1449 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| BARIUM PEROXIDE | 5.1 | OT2 | II | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 5.1 is “Oxidizing 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) |
|---|---|---|---|
| Barium peroxide | 5.1 | II | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 5.1 is “Oxidizer” (49 CFR 173.2).
12 · Questions
Barium peroxide — frequently asked questions
What is the CAS number of Barium peroxide?
The CAS number of Barium peroxide is 1304-29-6. Its EC number is 215-128-4.
What does a Barium peroxide label have to show?
Under CLP Annex VI the label for Barium peroxide carries the pictograms Flame over circle and Exclamation mark and the signal word is Danger.
Is Barium peroxide flammable?
CLP Annex VI assigns Barium peroxide 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 Barium peroxide a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Barium peroxide. 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 boiling point of Barium peroxide?
The boiling point reported for Barium peroxide is 800 °C (1472 °F), decomposes, decomposes (HSDB).
What is the melting point of Barium peroxide?
The melting point reported for Barium peroxide is 450 °C (842 °F) (HSDB).
How should Barium peroxide be stored?
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage and moisture. Separate from incompatibilities. Separate from combustibles, organic or other readily oxidizable materials. Avoid storage on wood floors. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Barium peroxide
Keep going: substances starting with B, or search the whole database by name, CAS number, pictogram or signal word.