Boric acid

Boric acid is a weak inorganic acid with the chemical formula BH3O3 and CAS number 10043-35-3. It is a white, crystalline compound with a molecular weight of 61.84 g/mol. Also known as hydrogen borate, orthoboric acid, or boracic acid, it occurs naturally in volcanic regions and hot springs. Boric acid is classified as a reproductive toxicant (Repr. 1B) under GHS classification, requiring careful handling and appropriate safety measures in industrial applications.

Boric acid appears as white, odorless crystalline powder or colorless crystals at room temperature. It has good solubility in water (approximately 50 g/L at 20°C) and is slightly soluble in alcohol. The compound is stable under normal conditions and has a melting point of around 170°C. It exhibits weak acidic properties in aqueous solutions and can form complex ions with polyhydroxy compounds. Boric acid is non-flammable and has relatively low volatility under standard conditions.

Boric acid serves multiple industrial and professional applications including glass and ceramic manufacturing, where it acts as a flux to lower melting temperatures. It is used in metallurgy for welding and brazing operations, in the production of borosilicate glass, and as a flame retardant in various materials. Additional applications include use in nuclear reactors as a neutron absorber, in photography as a developer, and in the production of other boron compounds for specialized industrial processes.

Boric acid requires careful handling due to its reproductive toxicity classification (Repr. 1B). Always wear appropriate personal protective equipment including safety goggles, protective gloves, and respiratory protection when handling powder forms. Work in well-ventilated areas or use local exhaust ventilation to minimize inhalation exposure. Avoid skin contact and ingestion. Pregnant women should avoid exposure due to reproductive hazards. Implement proper hygiene measures including washing hands thoroughly after handling and changing contaminated clothing immediately.

Boric acid should be stored in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Keep containers tightly closed and properly labeled to prevent moisture absorption and contamination. Store away from strong bases, active metals, and incompatible materials. Maintain storage temperatures below 25°C when possible. Ensure storage areas have appropriate containment measures for spill control and restrict access to authorized personnel only. Regular inspection of containers for damage or deterioration is recommended.

Immediate first aid measures are essential following boric acid exposure. For skin contact, remove contaminated clothing and wash affected area thoroughly with soap and water for at least 15 minutes. If eye contact occurs, flush immediately with clean water for 15-20 minutes and remove contact lenses if present. For inhalation, move person to fresh air immediately. If ingested, rinse mouth with water but do not induce vomiting. Seek medical attention promptly, especially given the reproductive toxicity concerns, and provide safety data sheet information to healthcare providers.

Boric acid disposal must comply with local and national waste regulations due to its hazardous classification. Never dispose of boric acid in regular household waste or pour down drains. Contact licensed waste disposal companies for proper handling and disposal. Small quantities may require neutralization before disposal, while larger amounts need specialized treatment. Always consult the safety data sheet and local environmental authorities for specific disposal requirements. Maintain disposal records as required by applicable regulations and consider waste minimization strategies in operations.

Boric acid transportation requirements depend on quantity, packaging, and specific transport regulations. While not classified under standard ADR dangerous goods categories for small quantities, larger shipments may require special considerations due to its hazardous properties. Use appropriate packaging that prevents spillage and contamination during transport. Ensure proper labeling with hazard information and emergency contact details. Carriers should be informed of the material's reproductive toxicity classification. Always verify current transport regulations with carriers and regulatory authorities before shipment.

Boric acid is subject to comprehensive European chemical regulations including REACH registration requirements and CLP classification as Repr. 1B. It requires hazard labeling with GHS08 pictogram and "Danger" signal word. Workplace exposure limits may apply in various EU member states. Users must implement appropriate risk management measures and provide safety training to workers. The substance may be subject to authorization or restriction procedures under REACH. Always consult current regulatory databases and legal requirements for compliance in specific applications and jurisdictions.

OYSI is a reliable European distributor of technical-grade boric acid, offering high-quality products for industrial and professional applications. As an established chemical distributor, OYSI provides comprehensive technical support, proper documentation including safety data sheets, and regulatory compliance assistance. They serve various industries across Europe with appropriate packaging options and logistics solutions. Contact OYSI directly for specific product specifications, availability, and technical consultation to ensure the boric acid grade meets your application requirements and regulatory obligations.