Potassium Chlorate: Molar Mass, Properties, Uses, and Safety Precautions

Potassium chlorate is a chemical compound that has found numerous applications in various industries. It is a white crystalline substance composed of potassium (K), chlorine (Cl), and oxygen (O). It is highly soluble in water and is known for its oxidizing properties. 

The chemical formula for potassium chlorate is KClO3. It consists of one potassium atom (K), one chlorine atom (Cl), and three oxygen atoms (O).

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Molar Mass of Potassium Chlorate

The molar mass of potassium chlorate (KClO3) can be calculated by summing the molar masses of its constituent elements:

  1. Potassium (K): 39.10 g/mol
  2. Chlorine (Cl): 35.45 g/mol
  3. Oxygen (O): 16.00 g/mol.

Calculate the molar mass of potassium chlorate:

Molar mass of KClO3 = (1 x molar mass of K) + (1 x molar mass of Cl) + (3 x molar mass of O) 

= (1 x 39.10 g/mol) + (1 x 35.45 g/mol) + (3 x 16.00 g/mol)

= 39.10 g/mol + 35.45 g/mol + 48.00 g/mol

= 122.55 g/mol

The molar mass of potassium chlorate (KClO3) is 122.55 g/mol.

Potassium Chromate Formula, Uses, Solution and Indicator Preparation 


Potassium chlorate (KClO3) decomposes when heated to release oxygen gas (O2) and leave behind potassium chloride (KCl) as a residue. 

2KClO3(s) → 2KCl(s) + 3O2(g)

In this reaction, the solid potassium chlorate breaks down into solid potassium chloride and oxygen gas. This property of potassium chlorate to decompose and release oxygen gas has various practical applications, including its use in pyrotechnics and as an oxygen source in emergency situations.

Potassium Chlorate: Molar Mass, Properties, Uses, and Safety Precautions

Properties of Potassium Chlorate

The properties of potassium chlorate is essential to appreciate its various applications. 

1. It is typically found in the form of odorless, white crystals.

2. It is highly soluble in water, which makes it suitable for various chemical processes.

3. It is a powerful oxidizing agent, meaning it can provide oxygen to support combustion reactions.

4. When heated to this decomposes and releasing oxygen gas and leaving behind potassium chloride (KCl).

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Uses of Potassium Chlorate

Potassium chlorate has a diverse range of uses, including:

1. It is a key ingredient in fireworks and safety matches due to its ability to provide oxygen for combustion.

2. It is used in the synthesis of various chemicals, including dyes and pharmaceuticals.

3. It is employed to generate oxygen gas in emergency oxygen packs and self-contained breathing apparatus (SCBA) used by firefighters.

4. It is use in agriculture as an herbicide to control weed growth.

Safety Precautions

Here some safety precautions to keep in mind:


Store potassium chlorate in a cool, dry place away from flammable substances and organic materials.


Wear appropriate protective gear, including gloves and safety goggles, when handling this compound.

Avoid Contamination

Do not mix potassium chlorate with incompatible substances, as it may lead to hazardous reactions.

Avoid Heat Contact 

Keep potassium chlorate away from open flames and heat sources to prevent spontaneous ignition.


Dispose of potassium chlorate waste following local regulations and guidelines.


It is a versatile chemical compound with a range of important applications. Its oxidizing properties make it valuable in pyrotechnics, chemical synthesis, and emergency oxygen production. 

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