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Violuric acid
Chemical compound / From Wikipedia, the free encyclopedia
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Violuric acid is an organic compound with the formula HON=C(CONH)2CO. It crystallizes as white or off-white monohydrate. The compound has attracted attention because its salts are deeply colored.[2]
Quick Facts Names, Identifiers ...
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Names | |
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IUPAC name
6-Hydroxy-5-nitroso-1H-pyrimidine-2,4-dione | |
Other names
2,4,5,6(1H,3H)-Pyrimidinetetrone 5-oxime 5-Hydroxyiminobarbituric acid 5-Isonitrosobarbituric acid Alloxan 5-oxime | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.001.584 ![]() |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C4H3N3O4 (anhydrous) C4H3N3O4·H2O (monohydrate) | |
Molar mass | 157.08 g/mol (anhydrous) 175.10 g/mol (monohydrate) |
Appearance | Off-white yellow or yellow cream solid |
Odor | Odorless |
Melting point | 247 °C (477 °F; 520 K) (decomposes) |
Boiling point | Decomposes |
0.704 g/100 mL (20 °C)[1] | |
Solubility | Soluble in alcohols |
Vapor pressure | ~0 mmHg |
Acidity (pKa) | 4.7 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Irritant |
GHS labelling: | |
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Warning | |
H315, H319, H335 | |
P261, P305+P351+P338 | |
Related compounds | |
Related compounds |
Barbituric acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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