| Melting point | 81-83 °C(lit.) |
| Boiling point | 170 °C15 mm Hg(lit.) |
| density | 1.06 |
| vapor density | 5.3 (vs air) |
| vapor pressure | >0.01 mm Hg ( 25 °C) |
| FEMA | 3107 | VANILLIN |
| refractive index | 1.4850 (estimate) |
| Fp | 147 °C |
| storage temp. | 2-8°C |
| solubility | methanol: 0.1 g/mL, clear |
| form | Crystalline Powder |
| pka | pKa 7.396±0.004(H2O I = 0.00 t = 25.0±1.0) (Reliable) |
| color | White to pale yellow |
| PH | 4.3 (10g/l, H2O, 20℃) |
| Water Solubility | 10 g/L (25 ºC) |
| Sensitive | Air & Light Sensitive |
| Merck | 14,9932 |
| JECFA Number | 889 |
| BRN | 472792 |
| Stability: | Stable. May discolour on exposure to light. Moisture-sensitive. Incompatible with strong oxidizing agents, perchloric acid. |
| CAS DataBase Reference | 121-33-5(CAS DataBase Reference) |
| NIST Chemistry Reference | Benzaldehyde, 4-hydroxy-3-methoxy-(121-33-5) |
| EPA Substance Registry System | Vanillin (121-33-5) |
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