Overview
Potassium carbonate sesquihydrate (CAS 6381-79-9 ) is a hydrated form of potassium carbonate supplying a consistent, measured water content that simplifies dosing in moisture-sensitive processes.
It functions as an alkali and pH buffer across food, agricultural, pharmaceutical, and industrial applications. In food production, it adjusts dough pH in cocoa processing and acts as a leavening agent.
This compound is particularly useful in baked goods where sodium-free formulations are required. Water treatment operations use it to raise pH and reduce corrosivity in distribution systems and boiler feed water.
Agrochemical formulators incorporate it as a potassium source in fertilizer blends and as a buffering agent in crop protection product concentrates. It ensures stability and efficacy in various agricultural settings.
In coatings and adhesive systems, it controls alkalinity during resin synthesis and improves adhesion performance on specific substrates. This versatility makes it a staple in industrial chemical manufacturing.
Potassium carbonate sesquihydrate is supplied as a white crystalline powder or granule. Food-grade ( FCC ) and pharmaceutical-grade ( USP , Ph. Eur. ) specifications are available to meet regulatory requirements.
Technical grade is standard for industrial and agricultural applications where tighter purity thresholds are not required. We ensure high-quality supply chains for all grades to meet your specific production needs.
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Physical Properties
| Melting Point | 891 °C |
| Density | 2.043 |
| Appearance | white crystalline powder |
| Color | White |
| Form | Solid |
| Water Solubility | Soluble in water. Practically insoluble in alcohol |
| Log P | -0.809 (est) |
Safety & Handling
Warning GHS07 Hazard Statements H302 H302 H315 H315 H319 H319 H335 H335 Precautionary Statements P261 P261 P264 P264 P270 P270 P271 P271 P280 P280 P319 P319 P321 P321 P330 P330 P405 P405 P501 P501 P264+P265 P264+P265 P301+P317 P301+P317 P302+P352 P302+P352 P304+P340 P304+P340 P332+P317 P332+P317 P337+P317 P337+P317 P362+P364 P362+P364 P403+P233 P403+P233 P305+P351+P338 P305+P351+P338
Trade & Regulatory
| HS Code | 28364000 |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 6381-79-9
- EC Number
- 209-529-3
- Mol. Weight
- 334.49
- HS Code
- 28364000
- Category
- Salts & Minerals