Potassium carbonate sesquihydrate
Potassium carbonate sesquihydrate (CAS 6381-79-9), molecular formula K2CO3 · 1.5H2O, is a high-purity chemical supplied by Tech Serve Solutions for acids & bases applications, to pharmacopoeia specification (USP, BP, EP). Every batch is tested and ships with a Certificate of Analysis; MSDS and technical data sheets are available on request. Tech Serve Solutions has supplied laboratory reagents, fine chemicals and pharmaceutical intermediates worldwide since 1998.
- IUPAC
- Carbonic acid, dipotassium salt, sesquihydrate (8CI) Dipotassium carbonate sesquihydrate Potash sesquihydrate Potassium carbonate (K2CO3) sesquihydrate Potassium carbonate 1.5-hydrate Potassium carbonate sesquihydrate
- Synonyms
- Carbonic aciddipotassium saltsesquihydrate (8CI) Dipotassium carbonate sesquihydrate Potash sesquihydrate Potassium carbonate (K2CO3) sesquihydrate Potassium carbonate 1.5-hydrate Potassium carbonate sesquihydrate

| Molecular weight | 165.23 |
|---|---|
| Linear formula | K2CO3 · 1.5H2O |
| Assay | 98.5-101.0% (ACS specification)99% |
| Grade | ACS reagent |
| Loss on drying | 14.0-16.5% loss on heating |
| Impurities tested | ≤0.001% N compounds≤0.004% S compounds (as SO42-)≤0.005% silica≤0.01% NH4OH pptd.≤0.01% insolubles |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
| Cation traces | Ca: ≤0.005%Fe: ≤5 ppmMg: ≤0.002%Na: ≤0.02%heavy metals (as Pb): ≤5 ppm |
| Anion traces | chloride (Cl-): ≤0.003%phosphate (PO43-): ≤0.001% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Supplied to USP, BP and EP standards. Every batch ships with a Certificate of Analysis (assay, identity, purity); MSDS and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Potassium carbonate sesquihydrate?
+
Potassium carbonate sesquihydrate (CAS 6381-79-9), molecular formula K2CO3 · 1.5H2O, is a high-purity chemical supplied by Tech Serve Solutions for acids & bases applications, to USP, BP and EP standards.
What grades of Potassium carbonate sesquihydrate does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Potassium carbonate sesquihydrate in USP, BP, EP and reagent/AR grades. Custom specifications for nutraceutical or specialty pharmaceutical applications are available — contact our technical sales team.
What is the CAS number and molecular formula of Potassium carbonate sesquihydrate?
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Potassium carbonate sesquihydrate has CAS number 6381-79-9 and molecular formula K2CO3 · 1.5H2O. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for Potassium carbonate sesquihydrate?
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Sample quantities are available for technical evaluation; bulk MOQ depends on grade and packaging. In-stock material typically ships in 7–10 working days; custom-spec orders take 3–4 weeks. Tech Serve Solutions ships worldwide with full export documentation.
Do you provide a Certificate of Analysis (CoA) with each shipment?
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Yes. Every batch of Potassium carbonate sesquihydrate ships with a Certificate of Analysis covering assay, identity and purity tests, plus pharmacopoeia conformance where applicable. MSDS and TDS documents are available on request before order placement.
How should Potassium carbonate sesquihydrate be stored?
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Store Potassium carbonate sesquihydrate in its original sealed container in a cool, dry place away from direct sunlight and incompatible materials, in line with the storage guidance on the Safety Data Sheet. Reseal between dispensings.
What is Potassium carbonate sesquihydrate used for?
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Potassium carbonate sesquihydrate is used in acids & bases applications across pharmaceutical, research and industrial settings. Our technical team can advise on suitability for your specific process.
How do I request a quote for Potassium carbonate sesquihydrate?
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Request a quote with your required grade, quantity and destination via https://www.techservesolutions.in/contact or email info@techservesolutions.in. We respond with specifications, a Certificate of Analysis and pricing.
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