Molekula
Potassium hydroxide, powder
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium hydroxide is a strong alkaline inorganic compound widely used in chemical synthesis, pH regulation, soap and detergent production, and industrial cleaning processes. It is also essential in food processing, water treatment, and as a reagent in laboratories. This powdered form of potassium hydroxide has a CAS number of 1310-58-3, with the molecular formula KOH and a molecular weight of 56.11. It is stored at ambient conditions and carries a **Danger** signal word due to its corrosive and hazardous nature. Molekula supplies Potassium hydroxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 kg — £35.80 per pack ex VAT · £42.96 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Loss on Drying | ≤1.0% |
| Chloride (Cl-) | ≤0.15% |
| Insoluble Matter | ≤0.1% |
| Heavy Metals (Pb) | ≤0.001% |
| Iron (Fe) | ≤0.002% |
| Identification (IR) | Conforms to reference |
| Calcium (Ca) | ≤0.002% |
| Magnesium (Mg) | ≤0.001% |
| Sodium (Na) | ≤1.0% |
| Total alkalinity as K2CO3 | ≥99.0% |
| Free alkali (KOH) | ≤0.5% |
| Sulphates (as K2SO4) | ≤0.05% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White rhombic crystals |
| Odour | Odorless |
| Melting Point | 380 °C |
| Boiling Point | 1327 °C |
| Density | 2.044 g/cm³ |
| Solubility (other solvents) | Soluble in ethanol, methanol |
| Vapour Pressure | 1 mmHg at 714 °C |
Source: PubChem CID 14797 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90019118 |
| CAS Number | 1310-58-3 |
| IUPAC Name | potassium hydroxide |
| EC Number | 215-181-3 |
| Molecular Formula | KOH |
| Molecular Weight | 56.11 |
| Exact Mass | 55.9664 |
| SMILES | [OH-].[K+] |
| InChIKey | KWYUFKZDYYNOTN-UHFFFAOYSA-M |
| InChI | InChI=1S/K.H2O/h;1H2/q+1;/p-1 |
| PubChem CID | 14797 |
| UN Number | UN1813 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2815.20.0050 |
| Tariff Code | 2815200000 |
Safety & GHS
-
Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P301+330 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Caswell No. 693
- Caustic potash
- Cyantek CC 723
- Hydroxyde de potassium
- Kali causticum
- Potash lye
- Potassa
- Potasse caustique
- Potassium hydrate
- POTASSIUM HYDROXIDE
Frequently asked questions
What is potassium hydroxide powder commonly used for?
Potassium hydroxide is widely used in the production of liquid soaps, detergents, and as a strong chemical base in various industrial processes, including pH regulation and organic synthesis.
What is the molecular formula and molecular weight of potassium hydroxide?
The molecular formula is **KOH**, and the molecular weight is **56.11 g/mol**.
How should potassium hydroxide powder be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture, carbon dioxide, and incompatible substances.
What grades of potassium hydroxide are available?
Molekula supplies **technical grade** and **laboratory reagent grade** potassium hydroxide powder, depending on purity and application requirements.
Can Molekula supply potassium hydroxide in bulk quantities?
Yes, we offer bulk packaging options for potassium hydroxide, including drums and custom quantities—please contact us for specific bulk pricing and availability.
What documentation comes with a potassium hydroxide order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and a **packing list** for compliance and safety.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.