Substance profile
Potassium Perchlorate
Potassium Perchlorate is colorless crystals or white, crystalline powder.
01 · Identification
What Potassium Perchlorate is
Potassium Perchlorate is colorless crystals or white, crystalline powder. It melts at 525 °C.
Under the GHS it carries the signal word Danger. It is classed as reactive agents - 1st degree.
02 · Identifiers
Potassium Perchlorate identifiers and molecular data
Potassium Perchlorate CAS number and EC number
Potassium Perchlorate molecular formula and molecular weight
03 · GHS classification
Potassium Perchlorate hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Potassium Perchlorate pictograms and signal word
Potassium Perchlorate hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Oxidising liquids or Oxidising solids | Category 1 | H271 | GHS03 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | 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.
Potassium Perchlorate hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H271 | May cause fire or explosion; strong oxidiser. |
| H302 | Harmful if swallowed. |
This page lists only the codes assigned to Potassium Perchlorate. 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 Potassium Perchlorate
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 Potassium Perchlorate 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
Potassium Perchlorate precautionary statements
CLP Annex VI assigns 4 precautionary statements to Potassium Perchlorate. 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
Potassium Perchlorate 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 | калиев перхлорат |
| Spanish español | Perclorato de potasio |
| Czech čeština | chloristan draselný |
| Danish dansk | kaliumperchlorat |
| German Deutsch | Kaliumperchlorat |
| Estonian eesti | kaaliumperkloraat |
| Greek ελληνικά | υπερχλωρικό κάλιο |
| English English | potassium perchlorate |
| French français | perchlorate de potassium |
| Croatian hrvatski | kalijev perklorat |
| Italian italiano | perclorato di potassio |
| Latvian latviešu | kālija perhlorāts |
| Lithuanian lietuvių | kalio perchloratas |
| Hungarian magyar | kálium-perklorát |
| Maltese Malti | perklorat tal-potassju |
| Dutch Nederlands | kaliumperchloraat |
| Polish polski | chloran(VII) potasu nadchloran potasu |
| Portuguese português | perclorato de potássio |
| Romanian română | perclorat de potasiu |
| Slovak slovenčina | chloristan draselný |
| Slovenian slovenščina | kalijev perklorat |
| Finnish suomi | kaliumperkloraatti |
| Swedish svenska | kaliumperklorat |
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
Potassium Perchlorate GHS label elements
Everything CLP Annex VI fixes for Potassium Perchlorate, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Potassium Perchlorate
- May cause fire or explosion; strong oxidiser.
- Harmful if swallowed.
- Do not eat, drink or smoke when using this product.
- IF SWALLOWED:
- 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 Potassium Perchlorate in the GHS label constructor →
07 · Health hazards
Potassium Perchlorate health hazards and exposure limits
Potassium Perchlorate hazard summary
Concentrated solutions are probably not irritating to the skin; May induce methemoglobinemia after ingestion; A strong oxidizer that is explosive when mixed with combustible materials releasing toxic gases including chlorine and hydrogen chloride; [CHEMINFO] Decomposes on heating to produce chlorine and chloroxides; [ICSC] See PERCHLORATES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Potassium Perchlorate 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.
Potassium Perchlorate melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 525 °C (977 °F) | HSDB | |
| 400 °C (752 °F) | decomposes | DrugBank |
Potassium Perchlorate density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.53 g/cm³ | HSDB | |
| 2.5 g/cm³ | ICSC | ||
| 2.52 g/cm³ | at 25 °C | DOE PAC |
Potassium Perchlorate solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SOL IN 65 PARTS COLD WATER, 15 PARTS BOILING WATER; PRACTICALLY INSOL IN ALCOHOL | HSDB | |
| INSOL IN ETHER | HSDB | ||
| In water, 15 g/l at 25 °C. | at 25 °C | HSDB |
Potassium Perchlorate lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | THERE HAVE BEEN THREE INDUSTRIAL EXPLOSIONS INVOLVING PHOTOFLASH COMPOSITION CONTAINING POTASSIUM PERCHLORATE WITH ALUMINUM & MAGNESIUM POWDERS. | HSDB | |
| ACTION AT LOW PRESSURE OF FLUORINE ON POTASSIUM PERCHLORATE PRODUCES FLUORINE PERCHLORATE, WHICH IS VERY UNSTABLE & EXPLODES EASILY. | HSDB | ||
| POWDERED MAGNESIUM PLUS POTASSIUM... PERCHLORATE IS FRICTION-SENSITIVE EXPLOSIVE MIXTURE. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Potassium Perchlorate 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.
Potassium Perchlorate fire potential
PRESENCE OF ALUMINUM FLUORIDE INCR THE EASE OF IGNITION OF ALUMINUM-PERCHLORATE MIXTURES, OWING TO COMPLEX FLUORIDE FORMATION.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Potassium Perchlorate storage and handling
Potassium Perchlorate safe storage
Separated from combustible substances and reducing agents. See Chemical Dangers.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Potassium Perchlorate storage conditions
OXIDIZING SUBSTANCES SHOULD...NOT BE STORED ALONGSIDE COMBUSTIBLE SUBSTANCES SUCH AS ORGANIC MATERIALS & METAL POWDERS &...SHOULD NOT BE KEPT NEAR REDUCING AGENTS.../THEY SHOULD BE SEGREGATED/ FROM ALL OTHER MATERIALS IN SUITABLE CONTAINERS IN FIRE-RESISTING STORE WHERE THEY CANNOT ACCIDENTALLY COME IN CONTACT WITH WATER. /OXIDIZING SUBSTANCES/
Source: Hazardous Substances Data Bank (HSDB)
Potassium Perchlorate reactivity
POTASSIUM PERCHLORATE is a strong oxidizing agent. Explosively decomposes at or over 400 °C. Decomposed by organic matter (reducible material) and on concussion [Merck 11th ed. 1989]. Mixture with powdered magnesium is a friction-sensitive explosive [Safety Eng. Reports 1947]. Incompatible with reducing agents, such as: metal powders, aluminum, titanium, barium, magnesium, nickel, various metal hydrides, and sulfur.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Potassium Perchlorate in the storage compatibility matrix →
11 · Transport
Potassium Perchlorate 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.
Potassium Perchlorate under UN 1489 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| POTASSIUM PERCHLORATE | 5.1 | O2 | 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) |
|---|---|---|---|
| Potassium perchlorate | 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
Potassium Perchlorate — frequently asked questions
What is the CAS number of Potassium Perchlorate?
The CAS number of Potassium Perchlorate is 7778-74-7. Its EC number is 231-912-9.
What does a Potassium Perchlorate label have to show?
Under CLP Annex VI the label for Potassium Perchlorate carries the pictograms Flame over circle and Exclamation mark and the signal word is Danger.
Is Potassium Perchlorate flammable?
CLP Annex VI assigns Potassium Perchlorate 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 Potassium Perchlorate a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Potassium Perchlorate. 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 melting point of Potassium Perchlorate?
The melting point reported for Potassium Perchlorate is 525 °C (977 °F) (HSDB).
How should Potassium Perchlorate be stored?
OXIDIZING SUBSTANCES SHOULD...NOT BE STORED ALONGSIDE COMBUSTIBLE SUBSTANCES SUCH AS ORGANIC MATERIALS & METAL POWDERS &...SHOULD NOT BE KEPT NEAR REDUCING AGENTS.../THEY SHOULD BE SEGREGATED/ FROM ALL OTHER MATERIALS IN SUITABLE CONTAINERS IN FIRE-RESISTING STORE WHERE THEY CANNOT ACCIDENTALLY COME IN CONTACT WITH WATER. /OXIDIZING SUBSTANCES/ (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Potassium Perchlorate
Keep going: substances starting with P, or search the whole database by name, CAS number, pictogram or signal word.