Oxoborinic acid

Oxoborinic acid
IUPAC name Oxoborinic acid
Other names Metaboric acid
Identifiers
CAS number	13460-50-9
PubChem	24492
ChemSpider	22900 Y
EC number	236-659-8
ChEBI	CHEBI:30172
Gmelin Reference	121829
Jmol-3D images	Image 1
SMILES OB=O
InChI InChI=1S/BHO2/c2-1-3/h2H Y Key: VGTPKLINSHNZRD-UHFFFAOYSA-N Y
Properties
Molecular formula	HBO2
Molar mass	43.82 g mol−1
Exact mass	44.006959742 g mol-1
Density	2.49 g cm-3
Structure
Coordination geometry	Linear digonal at B
Molecular shape	Nihilohedral at B
Hazards
EU classification	Xi
R-phrases	R36/37/38
S-phrases	S26, S37
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Molecular oxoborinic acid is only known in the gas phase, upon fusing, it polymerises into long chains, hence the relatively high melting point. It is the product of the dehydration of Boric acid at 170 degrees Celsius.