Substance profile
Potassium hydrogensulphate
Potassium hydrogensulphate: large Crystals; Other Solid; Dry Powder; Large Crystals.
01 · Identification
What Potassium hydrogensulphate is
Potassium hydrogensulphate: large Crystals; Other Solid; Dry Powder; Large Crystals. Its molecular formula is HKO4S and its molecular weight is 136.17 g/mol.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Potassium hydrogensulphate identifiers and molecular data
Potassium hydrogensulphate CAS number and EC number
Potassium hydrogensulphate molecular formula and molecular weight
03 · GHS classification
Potassium hydrogensulphate hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Potassium hydrogensulphate pictograms and signal word
Potassium hydrogensulphate hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | GHS05 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | 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 hydrogensulphate hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H335 | May cause respiratory irritation. |
| H314 | Causes severe skin burns and eye damage. |
This page lists only the codes assigned to Potassium hydrogensulphate. 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 hydrogensulphate
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 hydrogensulp… 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 hydrogensulphate precautionary statements
CLP Annex VI assigns 5 precautionary statements to Potassium hydrogensulphate. 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 hydrogensulphate 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 хидрогенсулфат |
| Spanish español | Hidrogenosulfato de potasio |
| Czech čeština | hydrogensíran draselný |
| Danish dansk | kaliumhydrogensulfat |
| German Deutsch | Kaliumhydrogensulfat |
| Estonian eesti | kaaliumvesiniksulfaat |
| Greek ελληνικά | όξινο θειικό κάλιο |
| English English | potassium hydrogensulphate |
| French français | hydrogénosulfate de potassium |
| Croatian hrvatski | kalijev hidrogensulfat |
| Italian italiano | idrogenosolfato di potassio |
| Latvian latviešu | kālija hidrogēnsulfāts |
| Lithuanian lietuvių | kalio vandenilio sulfatas |
| Hungarian magyar | kálium-hidrogén-szulfát |
| Maltese Malti | idroġensulfat tal-potassju |
| Dutch Nederlands | kaliumwaterstofsulfaat |
| Polish polski | wodorosiarczan(VI) potasu kwaśny siarczan potasu |
| Portuguese português | hidrogenossulfato de potássio |
| Romanian română | hidrogenosulfat de potasiu |
| Slovak slovenčina | hydrogensíran draselný |
| Slovenian slovenščina | kalijev hidrogensulfat |
| Finnish suomi | kaliumvetysulfaatti |
| Swedish svenska | kaliumvätesulfat |
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 hydrogensulphate GHS label elements
Everything CLP Annex VI fixes for Potassium hydrogensulphate, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Potassium hydrogensulphate
- May cause respiratory irritation.
- Causes severe skin burns and eye damage.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- Immediately call a POISON CENTER/doctor/…
- Do NOT induce vomiting.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Potassium hydrogensulphate in the GHS label constructor →
07 · Health hazards
Potassium hydrogensulphate health hazards and exposure limits
Potassium hydrogensulphate hazard summary
Reacts with water; A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; [ICSC] Causes burns; May cause respiratory irritation; [Aldrich MSDS]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Potassium hydrogensulphate 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 hydrogensulphate density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.2 g/cm³ | ICSC | |
| 2.24 g/cm³ | at 25 °C | DOE PAC |
Potassium hydrogensulphate solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility in water, g/100ml: 49 (very good) | ICSC | |
| Freely soluble in water, insoluble in ethanol | EU Food Improvement Agents |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Potassium hydrogensulphate storage and handling
Potassium hydrogensulphate safe storage
Dry. Separated from strong bases, alcohols, metals and food and feedstuffs.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Potassium hydrogensulphate reactivity
Acidic salts, such as POTASSIUM HYDROGEN SULFATE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Potassium hydrogensulphat… in the storage compatibility matrix →
10 · Questions
Potassium hydrogensulphate — frequently asked questions
What is the CAS number of Potassium hydrogensulphate?
The CAS number of Potassium hydrogensulphate is 7646-93-7. Its EC number is 231-594-1.
What is the chemical formula of Potassium hydrogensulphate?
The molecular formula of Potassium hydrogensulphate is HKO4S and its molecular weight is 136.17 g/mol.
What does a Potassium hydrogensulphate label have to show?
Under CLP Annex VI the label for Potassium hydrogensulphate carries the pictograms Corrosion and Exclamation mark and the signal word is Danger.
Is Potassium hydrogensulphate flammable?
CLP Annex VI assigns Potassium hydrogensulphate 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 hydrogensulphate a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Potassium hydrogensulphate. 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.
Nearby
Substances next to Potassium hydrogensulphate
Keep going: substances starting with P, or search the whole database by name, CAS number, pictogram or signal word.