Boric Acid - Pharmaceutical Applications
Pharmaceutical grade boric acid (99.5% min) supports buffering, preservation, and mild astringent applications across ophthalmic, cosmetic, and personal care formulations.Ophthalmic laboratories prepare isotonic boric acid eye washes (1.9% w/v) providing physiological buffering. Antimicrobial properties prevent Pseudomonas contamination while astringent action relieves ocular irritation.Cosmetic preservation employs 0.1-0.5% boric acid preventing microbial overgrowth. GRAS status enables broad-spectrum preservation without parabens compromising consumer safety profiles.Pharmaceutical buffering utilizes boric acid/borate combinations spanning pH 7.6-9.2 range. Superior buffering capacity versus phosphate systems prevents pH drift during stability studies.Quality control verifies boric acid content (titration), heavy metals (ICP-MS <1 ppm), and microbial limits. USP/NF specifications confirm suitability for topical pharmaceutical applications.Crystalline powder enables precise formulation control preventing over-buffering. Low toxicity profile (LD50 >2g/kg) supports sensitive mucosal applications across consumer products.Storage prevents caking through desiccant protection maintaining formulation consistency. LDPE containers prevent glass contamination during powder transfer operations.Regulatory dossiers support OTC monograph compliance across eye care and cosmetic categories. Consumer safety data confirms absence of reproductive toxicity concerns.
