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| Names | |
|---|---|
| Preferred IUPAC name
6-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid | |
| Other names
2,6-Dihydroxyisonicotinic acid; 2,6-Dihydroxypyridine-4-carboxylic acid | |
| Identifiers | |
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3D model (JSmol) |
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| ChEBI | |
| ChemSpider |
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| ECHA InfoCard | 100.002.483 
|
| EC Number |
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| MeSH | acid Citrazinic acid |
PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C6H5NO4 | |
| Molar mass | 155.109 g·mol−1 |
| Appearance | yellow powder |
| Melting point | >300 °C (decomp.) |
| Slightly soluble | |
| Solubility | Slightly soluble in methanol, DMSO, acidic solutions Very soluble in alkaline solutions |
| Hazards | |
| GHS labelling: | |
| |
| Warning | |
| H315, H319, H335 | |
| P261, P280, P305+P351+P338 | |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
> 3200 mg/kg ( Rat ) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Citrazinic acid (CZA) is a heterocyclic compound consisting of a dihydropyridine ring derived with a carboxylate group. The yellow solid exists as multiple tautomers, and it frequently forms dimers.[1]
Citrazinic acid is commonly formed in citric acid based carbon nanodots (CND). It is responsible for the blue light found in citric acid CNDs. The wavelengths of light emitted by citrazinic in CNDs can be shifted by changing the pH of the solution.[2]
Citrazinic acid can be prepared creating a solution of citric acid and toluenesulfonic acid, which forms a 1,3-diester. That solution, when added to a heated ammonia solution results in citrazinic acid.[3]
