| Melting point: |
197-200 °C (dec.) (lit.) |
| Boiling point: |
237.46°C (rough estimate) |
| Density |
1.54 |
| refractive index |
1.6400 (estimate) |
| FEMA |
4430 | 3,4-DIHYDROXYBENZOIC ACID |
| storage temp. |
Store below +30°C. |
| solubility |
20g/l |
| pka |
4.48(at 25℃) |
| form |
Fine Crystalline Powder |
| color |
Beige to brown |
| PH |
3.78(1 mM solution);3.25(10 mM solution);2.74(100 mM solution) |
| Odor |
at 100.00 %. mild phenolic balsamic |
| Odor Type |
phenolic |
| Water Solubility |
Soluble in hot alcohol and ether. Slightly soluble in water. |
| Sensitive |
Air Sensitive |
| Merck |
14,7894 |
| BRN |
1448841 |
| Stability: |
Stable. Incompatible with strong oxidizing agents, strong bases. |
| InChIKey |
YQUVCSBJEUQKSH-UHFFFAOYSA-N |
| LogP |
1.16 |
| CAS DataBase Reference |
99-50-3(CAS DataBase Reference) |
| EPA Substance Registry System |
Protocatechuic acid (99-50-3) |