Caustic Soda

Caustic soda, also known as sodium hydroxide (NaOH), is a highly alkaline and corrosive substance. It is a white, solid compound that is highly soluble in water, producing a strongly basic solution.

Uses of Sodium Hydroxide (Caustic Soda):

1

Chemical Manufacturing

Used in making soaps, detergents, and various industrial chemicals.

2

Cleaning Agent

Used in drain cleaners, oven cleaners, and industrial degreasers.

3

Paper & Textile Industry

Used in pulp processing and fabric treatment.

4

Water Treatment

Helps adjust pH levels and remove heavy metals.

5

Food Processing

Used in peeling fruits and vegetables, and in making pretzels to give them a glossy crust.

 Hazards & Precautions:

1

Highly corrosive

Can cause severe burns on skin and eyes.

2

Reacts with water and acids

Produces heat and can cause dangerous splashes.

3

Should be handled with care

Always use protective gloves, goggles, and work in a well-ventilated area.

Information on its chemical properties or safe handling procedures?

Chemical Properties of Sodium Hydroxide (Caustic Soda)

1

Chemical Formula:

NaOH

2

Molecular Weight

40.00 g/mol

3

Physical State

White, crystalline solid (flakes, pellets, or powder); highly soluble in water

4

pH

Strongly basic (pH ~14 in concentrated solution)

5

Solubility

Dissolves readily in water, releasing heat (exothermic reaction)

Reactivity

1

Reacts violently with acids, producing salt and water

2

Can corrode metals like aluminum and zinc, releasing hydrogen gas.

3

Absorbs moisture and CO₂ from the air, forming sodium carbonate (Na₂CO₃).

Safe Handling & Precautions

1

Personal Protective Equipment (PPE)

 Wear gloves (nitrile or rubber), goggles, and long-sleeved clothing.
Use a face shield when handling large amounts or concentrated solutions.

2

Storage

 Keep in a tightly sealed, labeled container.
Store in a cool, dry place, away from acids, aluminum, and moisture.

3

Mixing & Dilution

Always add NaOH to water, never the reverse (prevents dangerous splashes from exothermic reactions).
Use plastic or glass containers (NaOH can corrode metals).

4

First Aid Measures

 Skin Contact: Rinse with plenty of water for at least 15 minutes; remove contaminated clothing.
Eye Contact: Flush with water for at least 15 minutes and seek medical help.
Inhalation: Move to fresh air immediately; seek medical attention if breathing difficulty occurs.
Ingestion: Do not induce vomiting; rinse mouth and seek immediate medical help.

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