Molekula
Potassium carbonate anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium carbonate anhydrous is an inorganic salt commonly used as a pH regulator, buffering agent, and drying agent in pharmaceuticals, food processing, and chemical synthesis. It also serves as a source of potassium in fertilizers and plays a role in glassmaking and soap production. This chemical has a CAS number of 584-08-7, with the molecular formula K₂CO₃ and a molecular weight of 138.21 g/mol. It is stored at ambient conditions and carries a signal word of "Warning" for safety classification.
Molekula supplies Potassium carbonate anhydrous at ≥99% purity in 500 g and 1 kg packs, from £30.00 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
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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500 g — £25.00 per pack ex VAT · £30.00 inc. VAT
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1 kg — £43.40 per pack ex VAT · £52.08 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.
Other grades of Potassium carbonate anhydrous
| Grade | Purity | Price |
|---|---|---|
| Potassium carbonate anhydrous ACS grade | ≥99% purity | Price on request |
| Potassium Carbonate FG | — | Price on request |
| Potassium Carbonate Prills | — | Price on request |
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Water | ≤0.5% |
| Assay | ≥99% |
| Potassium Chloride (KCl) | ≤0.05% |
| Potassium Hydroxide (KOH) | ≤0.5% |
| Sodium carbonate (Na2CO3) | ≤0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless cubic crystals; hygroscopic |
| Odour | Odorless |
| Melting Point | 899 °C |
| Density | 2.29 g/cm³ |
| Solubility (other solvents) | Very soluble in water. Insoluble in ethanol |
Source: PubChem CID 11430 (HSDB, EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 90005035 |
| CAS Number | 584-08-7 |
| IUPAC Name | dipotassium;carbonate |
| EC Number | 209-529-3 |
| Molecular Formula | CK2O3 |
| Molecular Weight | 138.21 |
| Exact Mass | 137.9122 |
| SMILES | C(=O)([O-])[O-].[K+].[K+] |
| InChIKey | BWHMMNNQKKPAPP-UHFFFAOYSA-L |
| InChI | InChI=1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2 |
| PubChem CID | 11430 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28369950 |
| Tariff Code | 2836400000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Carbonate of potash
- Carbonic acid, dipotassium salt
- Dipotassium carbonate
- K-Gran
- Kalium carbonicum
- Kaliumcarbonat
- Pearl ash
- POTASSIUM CARBONATE
- Potassium carbonate (K2CO3)
- Salt of tartar
Frequently asked questions
What is potassium carbonate anhydrous commonly used for?
Potassium carbonate anhydrous is widely used in glass manufacturing, as a pH regulator in food and pharmaceuticals, and in the production of soft and liquid soaps.
What is the molecular formula and molecular weight of potassium carbonate anhydrous?
The molecular formula is K₂CO₃ and the molecular weight is 138.21 g/mol.
What safety classification does potassium carbonate anhydrous have?
The signal word for potassium carbonate anhydrous is Warning, indicating it poses moderate hazards under normal use.
How should potassium carbonate anhydrous be stored?
Store in a cool, dry place at ambient temperature, away from moisture and incompatible substances.
Does Molekula offer potassium carbonate anhydrous in bulk quantities?
Yes, Molekula supplies potassium carbonate anhydrous in bulk, with flexible packaging options to meet your requirements.
What documentation is provided with an order of potassium carbonate anhydrous?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Where can I buy Potassium carbonate anhydrous?
Directly from Molekula, which lists Potassium carbonate anhydrous in 500 g and 1 kg packs from £30.00 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.