Names | |
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IUPAC name
Hypoboric acid[1]
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Other names
(Dihydroxyboranyl)boronic acid
Hypoboric acid Hypodiboric acid Sub-boric acid (Unterborsäure in German) 1,1,2,2-Tetrahydroxydiborane | |
Identifiers | |
CAS Number
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3D model (JSmol)
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ChEBI |
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ChemSpider |
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ECHA InfoCard | 100.222.662 |
PubChem CID
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UNII |
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CompTox Dashboard (EPA)
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InChI
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SMILES
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Properties | |
Chemical formula
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B2H4O4 |
Molar mass | 89.65 g·mol−1 |
Appearance | White powder |
Density | 1.657 |
Melting point | 143–148 °C (289–298 °F; 416–421 K) |
Solubility in water
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very soluble |
Solubility | ethanol, DMF, DMSO, DMA |
Structure | |
Crystal structure
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monoclinic P21/c |
Thermochemistry | |
Std molar
entropy (S⦵298) |
125.46 J K−1 mol−1 |
Std enthalpy of
formation (ΔfH⦵298) |
−1410.43 kJ mol−1 |
Hazards | |
GHS labelling: | |
Hazard statements
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H302, H315, H319, H332, H335 |
Precautionary statements
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P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501 |
Related compounds | |
Related compounds
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Diborane Diboron tetrafluoride Bis(pinacolato)diboron |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Tetrahydroxydiboron is a chemical reagent which can be used to prepare boronic acids.[2]