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Basic Information

Potassium Carbonate
CAS No. 584-08-7
E Number E501(i)
Grade Food Grade
Molecular Formula K₂CO₃
Executive Standard  GB 25588-2010 / FCC / Food Grade International Standard
Certifications ISO9001, HALAL, KOSHER
Appearance White crystalline powder or granules
Solubility Freely soluble in water

Chemical Index (Dry Basis)

Inspection Item Standard Specification
Potassium Carbonate Assay ≥99.0%
Loss on Drying ≤0.50%
Chloride (as KCl) ≤0.015%
Sulfate (as SO₄) ≤0.010%
Iron (Fe) ≤0.0010%
Heavy Metals (as Pb) ≤2.0 mg/kg
Arsenic (As) ≤1.0 mg/kg
Water Insoluble Substances ≤0.02%

 

Product Overview

Potassium Carbonate (CAS 584-08-7, E501(i)) is a high-purity inorganic alkaline potassium salt. It is available in food grade and industrial grade, featuring sodium-free formula, strong alkalinity and stable pH buffering capacity. Widely used as an alkaline regulator in food processing, it adjusts pH and enhances color and flavor in cocoa, chocolate and baked goods, while also serving as a potassium source for food fortification.

 

Core Characteristics

1.White crystalline powder or granular, odorless, with a slightly salty alkaline taste.

2.Readily soluble in water, forming a strongly alkaline solution (pH around 11.6 for 1% solution).

3.Hygroscopic in open air, tends to absorb moisture and cake; storage must be sealed.

4.Sodium-free by nature, making it an ideal alternative to sodium-based alkaline regulators in low-sodium and sodium-free formulations.

5.Promotes Maillard reaction in cocoa, chocolate and baked goods, enhancing browning depth and aroma.

6.Good thermal stability under normal food processing conditions.

7.Food grade complies with international standards for pH regulators and potassium fortification.

 

Main Functions

1.pH Adjusting & Buffering Function: Acts as strong alkaline regulator to neutralize excess acid and stabilize pH value in cocoa, chocolate, beverage and dough systems.

2.Color & Flavor Modification Function: Promotes Maillard reaction, deepening cocoa and chocolate color and improving baked goods’ aroma and crust appearance.

3.Potassium Fortification Function: Provides bioavailable potassium ions, supporting potassium-enriched and sodium-reduced food formulations.

Applications

1.Food Industry: Potassium Carbonate is mainly applied in cocoa powder, chocolate, bakery products, noodles and pastries. It adjusts acidity, darkens cocoa color, enhances baked aroma and crust appearance, and supports sodium-reduced and potassium-enriched formulations.

2.Industrial Field :  Industrial grade Potassium Carbonate is used in glass manufacturing, printing and dyeing, desiccant, soap and chemical intermediate production.

3.Feed and Other Sectors:  It is occasionally used as potassium supplement in feed and as auxiliary material in pharmaceutical preparations with very low consumption.

 

Packaging &Storage

Packaging: 25kg food-grade plastic woven bag or kraft paper bag, inner food-grade PE lining.

Storage: Stored in dry and cool environment, away from moisture and high temperature.

 

Product Name: Potassium carbonate Other Name: Carbonic acid,potassium salt (1:2);Potassium carbonate (K2CO3);Carbonic acid,dipotassium salt;Pearl ash;Potassium carbonate (K2(CO3));Dipotassium carbonate;Potassium carbonate (2:1);Potash;Potassium carbonate;Salt of tartar;Sorb KX 35;FG;DCAD Plus;CLIMB;PX 1390-1;EF 80;LH 90;30095-94-4;1643774-52-0
CAS No.: 584-08-7 Molecular Formula: CH2O3.2K
InChIKeys: InChIKey=ILOXEKOBBABVRN-UHFFFAOYSA-N Molecular Weight: 138.20600
Exact Mass: 137.91200 EC Number: 209-529-3|241-378-9
UNII: BQN1B9B9HA ICSC Number: 1588
DSSTox ID: DTXSID2036245 Color/Form: Colorless cubic crystals; hygroscopic|Granules or granular powder|White, deliquescent, granular, translucent powder
HScode: 2836400000 Categories: Acidity Regulators

PSA: 63.19000 XLogP3: -2.44700
Appearance: white powder or granules Density: 3″>2.29 g/cm3
Melting Point: 891 °C Boiling Point: 333.6ºC at 760 mmHg
Flash Point: 111ºC Water Solubility: H2O: 1120 g/L (20 ºC)
Storage Conditions: Store at RT. Toxicity: LD50 orally in rats: 1.87 g/kg, H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969)
Odor: Odorless Taste: Alkaline taste
Experimental Properties: Hygroscopic|Enthalpy of fusion: 27.60 kJ/mol at 899 °C|Decomposes on heating with CO2 loss.|Deliquesces in moist air|For more Other Experimental Properties (Complete) data for POTASSIUM CARBONATE (6 total), please visit the HSDB record page.

Classification of the substance or mixture

Skin irritation, Category 2

Eye irritation, Category 2

Specific target organ toxicity – single exposure, Category 3

GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Warning

Hazard statement(s)

H315 Causes skin irritation

H319 Causes serious eye irritation

H335 May cause respiratory irritation

Precautionary statement(s)
Prevention

P264 Wash … thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.

Response

P302+P352 IF ON SKIN: Wash with plenty of water/…

P321 Specific treatment (see … on this label).

P332+P317 If skin irritation occurs: Get medical help.

P362+P364 Take off contaminated clothing and wash it before reuse.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P319 Get medical help if you feel unwell.

Storage

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

P405 Store locked up.

Disposal

P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Dry. Separated from strong acids.Keep tightly closed.