Vanillin
IUPAC name[hide] 4-Hydroxy-3-methoxybenzaldehyde[1]
Other names[hide] Methyl vanillin[2] Vanilin[citation needed] Vanillic aldehyde[1]
Identifiers
CAS number	121-33-5 Y
PubChem	1183
ChemSpider	13860434 Y
UNII	CHI530446X Y
EC number	204-465-2
KEGG	D00091 Y
MeSH	vanillin
ChEBI	CHEBI:18346 Y
ChEMBL	CHEMBL13883 Y
RTECS number	YW5775000
Beilstein Reference	472792
Gmelin Reference	3596
3DMet	B00167
Jmol-3D images	Image 1
SMILES [show] COC1C=C(C=O)C=CC1=O
InChI [show] InChI=1S/C8H8O3/c1-11-8-4-6(5-9)2-3-7(8)10/h2-5,8H,1H3 N Key: DPRSTFFEDAVZJW-UHFFFAOYSA-N N InChI=1/C8H8O3/c1-11-8-4-6(5-9)2-3-7(8)10/h2-5,10H,1H3 Key: MWOOGOJBHIARFG-UHFFFAOYAS
Properties
Molecular formula	C8H8O3
Molar mass	152.15 g mol−1
Exact mass	152.047344122 g mol-1
Appearance	White crystals
Odor	Floral, pleasant
Density	1.056 g cm-3
Melting point	81-83 °C, 354-356 K, 178-181 °F
Boiling point	285 °C, 558 K, 545 °F
Solubility in water	10 g dm-3
log P	1.208
Vapor pressure	>1 Pa
Acidity (pKa)	7.781
Basicity (pKb)	6.216
Structure
Crystal structure	Monoclinic
Hazards
MSDS	hazard.com
GHS pictograms
GHS signal word	WARNING
GHS hazard statements	H302, H317, H319
GHS precautionary statements	P280, P305+351+338
EU classification	Xn
R-phrases	R22
NFPA 704	1 1 0
Flash point	147 °C
Related compounds
Related compounds	Anisaldehyde Eugenol Phenol
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C,