| Ammeline | |
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4,6-Diamino-2-hydroxy-1,3,5-triazine |
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Other names
Ammelin, s-triazin-2-ol, 2,4-diamino-1,3,5-triazin-6-one |
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| Identifiers | |
| CAS number | 645-92-1 |
| PubChem | 12583 |
| ChemSpider | 12063 |
| KEGG | C08733 |
| ChEBI | CHEBI:28646 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C3H5N5O |
| Molar mass | 127.11 g/mol |
| Appearance | White powder |
| Melting point |
N/A (decomposes before melting) |
| Solubility in water | trace |
| Solubility | soluble in aqueous alkalies and mineral acids, but not acetic acid |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Ammeline (4,6-Diamino-2-hydroxy-1,3,5-triazine) is a triazine. It is the hydrolysis product of melamine.
Ammeline can be synthesized by the pyrolysis of urea, or the condensation reaction amond 2 moles of dicyandiamide with 1 mole of biuret.
Ammeline is weakly acidic with pKa ~9. It can form nitrate, sulfate, chromate and oxalate salts. Ammeline reacts with boiling dilute hydrochloric acid to form melem and ammonia.
Ammeline is the first step in melamine hydrolysis. Further hydrolysis (e.g. boiling ammeline with dilute alkali) yields ammelide.