| Melting point: |
208-210 °C(lit.) |
| Boiling point: |
257.07°C (rough estimate) |
| Density |
1.3037 (rough estimate) |
| refractive index |
1.5090 (estimate) |
| FEMA |
3988 | 4-HYDROXY-3-METHOXYBENZOIC ACID |
| storage temp. |
Store below +30°C. |
| solubility |
Acetonitrile (Slightly), Aqueous Base (Slightly), DMSO (Slightly), Methanol (Slightly） |
| pka |
pKa 4.53(H2O
t = 25
c = 0.016–0.001) (Uncertain) |
| form |
Liquid |
| color |
Clear colorless to brown, may darken during storage |
| Odor |
at 100.00 %. dairy milky custard creamy powdery vanilla bean |
| Odor Type |
creamy |
| Water Solubility |
Soluble in water, alcohol and ether. |
| Merck |
14,9931 |
| JECFA Number |
959 |
| BRN |
2208364 |
| Stability: |
Stable. Combustible. Incompatible with strong oxidizing agents. |
| InChIKey |
WKOLLVMJNQIZCI-UHFFFAOYSA-N |
| LogP |
1.30 |
| CAS DataBase Reference |
121-34-6(CAS DataBase Reference) |
| NIST Chemistry Reference |
Benzoic acid, 4-hydroxy-3-methoxy-(121-34-6) |
| EPA Substance Registry System |
Vanillic acid (121-34-6) |