Selenic acid
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Selenic acid is the inorganic compound with the formula H2SeO4. It is an oxoacid of selenium, and its structure is more accurately described as O2Se(OH)2. It is a colorless compound. Although it has few uses, one of its salts, sodium selenate is used in the production of glass and animal feeds.[3]
Quick Facts Names, Identifiers ...
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Names | |||
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IUPAC name
Selenic(VI) acid | |||
Other names
Selenic acid | |||
Identifiers | |||
3D model (JSmol) |
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ChEBI | |||
ChemSpider |
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ECHA InfoCard | 100.029.072 | ||
EC Number |
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KEGG |
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PubChem CID |
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RTECS number |
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UNII | |||
UN number | 1905 | ||
CompTox Dashboard (EPA) |
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Properties | |||
H2SeO4 | |||
Molar mass | 144.9734 g/mol | ||
Appearance | Colorless deliquescent crystals | ||
Density | 2.95 g/cm3, solid | ||
Melting point | 58 °C (136 °F; 331 K) | ||
Boiling point | 260 °C (500 °F; 533 K) (decomposes) | ||
130 g/(100 mL) (30 °C) | |||
Acidity (pKa) | pKa1 = −3 pKa2 = 1.9[1] | ||
Conjugate base | Biselenate | ||
−51.2·10−6 cm3/mol | |||
Refractive index (nD) |
1.5174 (D-line, 20 °C) | ||
Structure | |||
tetrahedral at Se | |||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
Corrosive, highly toxic | ||
GHS labelling:[2] | |||
Danger | |||
H301, H315, H318, H331, H373, H410 | |||
P260, P261, P264, P270, P271, P273, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P310, P311, P314, P321, P330, P332+P313, P362, P391, P403+P233, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Related compounds | |||
Other anions |
selenious acid hydrogen selenide | ||
Other cations |
sodium selenate potassium selenate | ||
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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