Caustic soda Pearl

Caustic Soda Granular, also known as Sodium Hydroxide Granules, Caustic Soda Pearls / Beads / Granules, or Caustic Soda Sugar Form, is a white, uniform, dry, free-flowing solid form of Sodium Hydroxide (NaOH).

Compared to Caustic Soda Flakes, the granular type has smaller particle size, higher density, and superior uniformity, making it ideal for high-precision applications in pharmaceutical, food, chemical, and laboratory industries.

Chemical Structure of Caustic Soda Granular

• Chemical Name: Sodium Hydroxide

• Chemical Formula: NaOH

• CAS Number: 1310-73-2

• Structure: Ionic – composed of Na⁺ and OH⁻ ions

• Common Grades: Industrial (Technical Grade), Food Grade (FCC), Laboratory (Analytical Grade)

Physical and Chemical Properties

Applications

1. Detergent and Cleaning Industry

• Production of strong alkaline cleaners and solid soaps

• Effective in removing heavy industrial grease and oil

• Preparation of alkaline cleaning solutions for surface treatment

2. Food and Beverage Industry

• pH control in the production of cocoa, soft drinks, and vegetable oils

• Chemical peeling of vegetables and olives (Lye Peeling)

• Used in CIP (Cleaning-In-Place) systems for process equipment

3. Pharmaceutical and Laboratory Applications

• Used as a pH adjuster in chemical synthesis

• Preparation of buffer solutions and alkaline titrants

• Reagent in organic and inorganic synthesis

4. Metal and Galvanizing Industries

• Alkaline degreasing and metal surface cleaning

• Oxide layer removal from aluminum and zinc surfaces

5. Pulp, Dyeing, and Petrochemical Industries

• Bleaching of cellulose fibers in paper and textile industries

• Used in polymerization and saponification reactions

Advantages

✅ Uniform granular form → faster dissolution and more precise dosing than flake type
✅ Better stability in storage (when properly packaged)
✅ Low dust generation, improving safety and handling convenience
✅ Suitable for sensitive laboratory and food-grade applications

Disadvantages

⚠️ Higher cost compared to flake caustic soda (due to refined processing)
⚠️ Highly exothermic reaction with water – temperature must be controlled
⚠️ Strongly corrosive to metals and biological tissue
⚠️ Absorbs moisture and CO₂ from air, leading to purity reduction if improperly stored

Safety and Handling

• GHS Classification: H314 – Causes severe skin burns and serious eye damage

• Personal Protective Equipment (PPE):

  • Alkali-resistant gloves (PVC or neoprene)

  • Safety goggles or face shield

  • Dust mask (for fine granules)

  • Chemical-resistant clothing

Emergency Measures:

• Skin/Eye Contact: Rinse immediately with plenty of cold water for at least 15 minutes and seek medical attention.

• Ingestion: Do not induce vomiting. Drink plenty of water and seek immediate medical care.

Storage Conditions

• Store in multi-layer polyethylene moisture-proof bags or sealed plastic drums

• Keep in a dry, cool, well-ventilated area

• Keep away from acids and light metals

Chemical Incompatibilities

• Strong acids → violent reaction

• Light metals (e.g., aluminum, zinc) → releases flammable hydrogen gas

• Chlorinated organic compounds → hazardous reaction

Packaging

• Standard Packaging: 25 kg three-layer moisture-proof bags

• Laboratory Grades: 1–5 kg sealed containers (HDPE or PE-coated)

Summary

Caustic Soda Granular (NaOH) is a high-purity, free-flowing alkaline compound designed for applications requiring precision, safety, and consistency.
With its fast solubility, low dust, and stable granular form, it is the preferred choice for pharmaceutical, food, laboratory, and high-quality industrial processes.