What Makes Boric Acid a Vital Micronutrient and Industrial Compound?
Technical Introduction
Boric acid (H₃BO₃) is a white, crystalline, water-soluble compound widely used as a source of boron in agriculture and in various industrial applications.
Boron is an essential micronutrient that supports cell wall formation, sugar transport, flower development, and fruit set in plants.
Industrial-grade boric acid is used in glass, ceramics, flame retardants, and antiseptics.
Applications
1. Agriculture & Horticulture
Micronutrient Fertilizer: Corrects boron deficiencies in fruits, vegetables, cereals, and legumes.
Foliar Spray: Rapid uptake for immediate correction of deficiency symptoms.
Soil Amendment: Stabilizes pH and improves nutrient availability.
2. Industrial Uses
Glass & Ceramics: Improves thermal resistance and strength.
Flame Retardants: Used in polymers and textiles.
Antiseptic & Preservative: Mild disinfectant and preservative in some formulations.
3. Other Uses
Buffering Agent: In chemical synthesis and laboratory applications.
Pest Control: Sometimes used as a component in insecticides.
Advantages
Highly Soluble: Ensures quick uptake in plants.
Multi-Purpose: Serves agricultural, industrial, and chemical roles.
Non-Toxic at Recommended Levels: Safe for crops, animals, and humans when used properly.
Stable Storage: Long shelf life under dry conditions.
Typical Parameters
| Property | Value |
|---|---|
| Chemical Formula | H₃BO₃ |
| Boron (B) Content | ~17–18% |
| Appearance | White crystalline powder |
| Solubility in Water | 57 g/L at 20°C |
| pH (5% solution) | 5.0–7.0 |
| Purity | ≥ 99% |
| Shelf Life | 3 years in sealed, dry packaging |
FAQs
Q1: What is the difference between boric acid and borax?
A1: Boric acid (H₃BO₃) is a direct source of boron, while borax (Na₂B₄O₇·10H₂O) is a sodium borate salt that also supplies boron.
Q2: Can boric acid be applied as a foliar spray?
A2: Yes, but concentrations should be low (typically 0.1–0.3%) to avoid leaf burn.
Q3: Is boric acid safe for humans and animals?
A3: Yes, in recommended agricultural doses; high concentrations can be toxic.
Q4: How quickly does it correct boron deficiency in plants?
A4: Foliar applications can show improvement within a few days; soil applications may take longer.
Q5: How should boric acid be stored?
A5: Keep in a dry, cool, and ventilated area, sealed to prevent moisture absorption.
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