Orthoboric acid

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02195074.1 0219507401 0219507405
76177-412EA 48.55 USD
76177-412 76177-414 76177-416
Orthoboric acid
ortho-Boric acid

Boric Acid is used for weatherproofing wood and fireproofing fabrics; as a preservative; manufacturing of cements, crockery, porcelain, enamels, glass, borates, leather, carpets, hats, soaps, artificial gems; in nickeling baths; cosmetics; printing and dyeing, painting; photography; for impregnating wicks; electric condensers; hardening steel. Also used as insecticide for cockroaches and black carpet beetles. In the research labs it is used as an astringent, antiseptic, antibacterial and antifungal agent. Used in buffers and for calibration of polyacrylamide gel columns for the separation of oligonucleotides by capillary electrophoresis.
Room Temperature, desiccate


  • Presentation: White Powder
  • Vapor Pressure: 2.6 mmHg (20 °C)(Lit.)
  • pKa: 9.23 at 25 °C
  • Soluble in water; insoluble in alcohol; freely soluble in boiling water.

Formula: B(OH)₃
MW: 61.83 g/mol
Boiling Pt: 185
Melting Pt: 160 (lit.)
Density: 1.5172 g/cm³ (14 °C) (lit.)
Storage Temperature: Ambient
MDL Number: MFCD00011337
CAS Number: 10043-35-3
Merck Index: 13,01326
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Specification Test Results

Identity Test Passes
FTIR Conforms to Standard
pH (5% aw soln) 3-6.5
B2O3 56.25 - 56.80%
H3BO3 99.9 - 100.90%
Cl 0-0.0010%
Fe 0-0.004%
SO4 0-0.0250%
20 Mesh 0-2.0%


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