Tetraboric acid

Tetraboric acid
Names
IUPAC name
  • 3,7-Dihydroxy-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane
  • Pyroboric acid
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/B4H2O7/c5-1-9-3(7)11-4(8)10-2-6/h7-8H checkY
    Key: RTANKYMJXZNJGQ-UHFFFAOYSA-N checkY
  • OB(OB=O)OB(O)OB=O
Properties
B4H2O7
Molar mass 157.25 g·mol−1
Appearance white solid
Melting point 236 °C (457 °F; 509 K)[1]
Conjugate base Tetraborate
Hazards
GHS labelling:
Warning
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Tetraboric acid or pyroboric acid is a chemical compound with empirical formula H2B4O7.[2] It is a colourless water-soluble solid formed by the dehydration or polymerization boric acid.

Tetraboric acid is formally the parent acid of the tetraborate anion [B4O7]2−.

  1. ^ Cite error: The named reference parl2022 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference green1997 was invoked but never defined (see the help page).