Acids & Salts Available — Bulk Only

Potassium Carbonate (Dipotassium Carbonate)

K2CO3
CAS 584-08-7 · Formula CK2O3 · MW 138.205 g/mol

A mild alkali for glass and ceramics, soap making, drying duty, and pH control. Established uses include glass and ceramics manufacture, soap making, desiccant and drying duty (including drying of organic liquids), gas purification, leather tanning and finishing, and use in dyes, pigments, and printing inks.

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UN Number
UN 1814
Hazard Class
Class 8
HS Code
2836.40
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
pH Adjustment · Cleaning / Degreasing
Solubility
Very soluble in water. Insoluble in ethanol
Functional Roles
POTASSIUM CARBONATE
BUFFERING
Applications & Use Cases
  • Glass & ceramics: Flux and raw material in glass and pottery
  • Soap making: Alkali for soft-soap and potassium-salt manufacture
  • Drying/desiccant: Dehydrating agent for gases and organic liquids
  • Gas purification: Absorbent in gas-treating systems
  • pH/acidity regulation: Mild alkali and food-additive acidity regulator
Physical Properties
Melting Point
899 °C
Boiling Point
Decomposes
Density
2.29 g/cu cm
Solubility
Very soluble in water. Insoluble in ethanol
pH
pH = 11.6 (aqueous solution)
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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DOT / UN Transport Classification
DOT hazard class 8 placard
UN / DOT NumberUN 1814
Hazard Class / DivisionClass 8
Packing GroupII
Proper Shipping NamePotassium hydroxide, solution

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2836 . 40
Chapter 28
Inorganic chemicals; compounds of precious metals and rare-earth metals
Heading 28.36
Internationally harmonized (WCO HS)
Subheading 2836.40
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
584-08-7
Molecular Formula
CK2O3
Molecular Weight
138.205 g/mol
IUPAC Name
dipotassium;carbonate
INCI Name
POTASSIUM CARBONATE
PubChem CID
InChI Key
BWHMMNNQKKPAPP-UHFFFAOYSA-L
Synonyms & Trade Names
POTASSIUM CARBONATE Dipotassium carbonate Carbonate of potash Potassium carbonate, anhydrous Carbonic acid, dipotassium salt Pearl ash Salt of tartar Kaliumcarbonat Kalium carbonicum K-Gran Potassium carbonate (K2CO3) Potassium carbonate (2:1) Kali carbonicum Potassium carbonate (K2(CO3)) Dcad plus K2CO3 INS NO.501(I)
Full Description

Potassium carbonate (CAS 584-08-7) is the potassium salt of carbonic acid, K2CO3. Established uses include glass and ceramics manufacture, soap making, desiccant and drying duty (including drying of organic liquids), gas purification, leather tanning and finishing, and use in dyes, pigments, and printing inks. It also serves as a food-additive acidity regulator and a general pH-adjusting agent.

Frequently Asked Questions

What is potassium carbonate used for?

Potassium carbonate (K2CO3, CAS 584-08-7) is used in glass and ceramics manufacture, soap making, as a desiccant/drying agent for gases and organic liquids, in gas purification, in leather tanning and finishing, in dyes, pigments and printing inks, and as a food-additive acidity regulator and general pH adjuster.

What is another name for potassium carbonate?

Potassium carbonate is historically known as potash or pearl ash; its formula is K2CO3, CAS 584-08-7. This product is an anhydrous granular grade.

What is the chemical formula for potassium carbonate?

Potassium carbonate is K2CO3 (listed formula CK2O3), the potassium salt of carbonic acid. It is supplied here as an anhydrous granular material under HS 2836.40.

Why is potassium carbonate used as a desiccant?

Potassium carbonate is hygroscopic and is used to dry gases and remove water from organic liquids, and as an absorbent in gas-treating systems. The anhydrous granular form is convenient for these drying and gas-purification duties.

What is the cost of bulk potassium carbonate?

Bulk pricing depends on grade, packaging (bags, drums, supersacks), and volume. Submit a bulk RFQ with quantity and packaging for a current quote with CoA and SDS; we do not list fixed prices.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.