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Potassium carbonate sesquihydrate

CAS Number
6381-79-9
EC Number
209-529-3
Chemical Formula
CH2O3.3/2H2O.2K
Molecular Weight
334.49 g/mol

Description

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. Contact us for supply of Potassium carbonate sesquihydrate Request Quote

Other Names (Synonyms)

Carbonic acid, dipotassium salt, hydrate (2:3) | Carbonic acid, dipotassium salt, sesquihydrate | Potassium carbonate 1.5-hydrate | Potash sesquihydrate | Dipotassium Carbonate Sesquihydrate | K2CO3·1.5H2O.

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point891 °C
Density2.043
Appearancewhite crystalline powder
ColorWhite
FormSolid
Water SolubilitySoluble in water. Practically insoluble in alcohol
Log P-0.809 (est)

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H302
H302
H315
H315
H319
H319
H335H335

Precautionary Statements

P261
P261
P264
P264
P270
P270
P271
P271
P280
P280
P319
P319
P321
P321
P330
P330
P405
P405
P501
P501
P265
P265
P317
P317
P352
P352
P340
P340
P317
P317
P317
P317
P364
P364
P233
P233
P338

Trade & Regulatory

HS Code28364000
WGK (Germany)1