Description
| Citric acid Chemical Properties |
| Melting point | 153-159 °C (lit.) |
| Boiling point | 248.08°C (rough estimate) |
| density | 1.67 g/cm3 at 20 °C |
| vapor density | 7.26 (vs air) |
| vapor pressure | <0.1 hPa (20 °C) |
| refractive index | 1.493~1.509 |
| FEMA | 2306 | CITRIC ACID |
| Fp | 100 °C |
| storage temp. | 2-8°C |
| solubility | Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C. |
| form | grit |
| pka | 3.14(at 20℃) |
| color | White |
| PH | 3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution); |
| Odor | Odorless |
| Odor Type | odorless |
| explosive limit | 8%, 65°F |
| Water Solubility | soluble in Water (1174g/L at 10°C, 1809g/L at 30°C, 3825g/L at 80°C). |
| Sensitive | Hygroscopic |
| λmax | λ: 260 nm Amax: 0.20 λ: 280 nm Amax: 0.10 |
| Merck | 14,2326 |
| JECFA Number | 218 |
| BRN | 782061 |
| Stability: | Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates. |
| InChIKey | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| LogP | -1.64 |
| CAS DataBase Reference | 77-92-9(CAS DataBase Reference) |
| NIST Chemistry Reference | 1,2,3-Propanetricarboxylic acid, 2-hydroxy-(77-92-9) |
| EPA Substance Registry System | Citric acid (77-92-9) |
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