Description
Boric Acid Powder (H3BO3, CAS: 10043-35-3), also known as hydrogen borate or orthoboric acid, is a low-toxicity, water-soluble Lewis acid of boron. Presented as a fine, odorless, white crystalline powder, it serves as an exceptionally versatile chemical raw material across industrial manufacturing, pest management, agricultural trace nutrition, and household cleaning formulations.
Key Benefits & Functional Applications
Insect & Pest Control: Boric Acid Powder acts as a proven, slow-acting mechanical pest control agent. It disrupts the digestive system and exoskeletons of roaches, ants, termites, and silverfish, making it a cornerstone component in dusting powders and bait formulations.
Industrial & Glass Manufacturing: Functions as a key fluxing agent and network former in heat-resistant borosilicate glass, fiberglass production, ceramics, and porcelain enamels to lower melting temperatures and increase thermal durability.
Flame Retardancy: Utilized as a fire-retardant additive in cellulose insulation, timber treatments, mattresses, and textiles, significantly inhibiting combustion and smoke formation.
Agricultural Micronutrient: Delivers essential, bioavailable boron required for cell wall development, seed germination, and sugar transport in boron-deficient agricultural crops and soils.
Chemical Intermediate & Buffering Agent: Serves as a mild acid buffer in industrial electroplating baths, metallurgical fluxes, and timber preservative treatments.
Technical Specifications & Product Properties
| Property | Specification / Typical Value |
| Chemical Name | Orthoboric Acid / Hydrogen Borate |
| Chemical Formula | H3BO3 |
| CAS Number | 10043-35-3 |
| Purity / Assay | ≥ 99.5% |
| Appearance | Fine, odorless white crystalline powder |
| Melting Point | 70.9 °C (decomposes) |
| Solubility | 4.72 g/100 mL water at 20 °C (freely soluble in hot water) |
| pH (0.1 M Solution) | 5.1 (weakly acidic) |
Safety & Handling Guidelines
Keep containers tightly sealed in a cool, dry, and well-ventilated area. Protect from moisture, heat, and incompatible strong bases or reducing agents. Wear personal protective equipment (dust mask, gloves, and eye protection) during bulk powder handling to avoid dust inhalation and skin irritation









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