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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 262238Generated: October 23, 2026

5-Bromo-2-hydroxy-3-methoxybenzaldehyde

5-BROMO-2-VANILLIN · BUTTPARK 153\33-74 · 5-BROMO-O-VANILLIN · Vanillin Impurity 17 · OTAVA-BB BB7018802005 · 5-BROMO-3-METHOXYSALICYLALDEHYDE · 3-Methoxy-5-bromosalicylaldehyde · 5-Bromo-2-hydroxy-3-methoxybenzaldehyde

https://huagongshe.com/en/chemical/262238

5-Bromo-2-hydroxy-3-methoxybenzaldehyde molecular structure

Identifiers & Physical Properties

CAS No.5034-74-2
Molecular formulaC8H7BrO3
Average molar mass231.04 g/mol
Monoisotopic mass229.95785618 g/mol
SMILESCOc1cc(Br)cc(C=O)c1O
InChIKeyMMFKBTPDEVLIOR-UHFFFAOYSA-N
PubChem CID262238
ChEMBLCHEMBL3660317
EC No.628-660-0
DTXSIDDTXSID10294271

Chemical & Physical Properties

XLogP2.1
Topological polar surface area46.5
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds2
Heavy atoms12
Formal charge0
Complexity162
SpringerMaterials PropertiesChemical shift
Melting point125-127 °C (lit.)
Boiling point277.2±35.0 °C(Predicted)
Density1.6494 (rough estimate)
Refractive index1.4730 (estimate)
Storage conditionsunder inert gas (nitrogen or Argon) at 2-8°C
Physical statesolid
pKa (acidity coefficient)7.62±0.23(Predicted)
AppearanceWhite to off-white Solid
SensitivityAir Sensitive
BRN2328601
InChI1S/C8H7BrO3/c1-12-7-3-6(9)2-5(4-10)8(7)11/h2-4,11H,1H3
InChIKeyMMFKBTPDEVLIOR-UHFFFAOYSA-N
SMILESCOc1cc(Br)cc(C=O)c1O
CAS DataBase Reference5034-74-2(CAS DataBase Reference)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-37/39
Water hazard class (WGK)3
Customs code29130000
Storage class11 - Combustible Solids
Hazard classEye Irrit. 2Skin Irrit. 2STOT SE 3

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 2.2% (1 of 45) of reports.WarningH315 (97.8%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 45 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationBenzaldehyde, 5-bromo-2-hydroxy-3-methoxy-: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesSkin Irrit. 2 (97.8%)
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)3
Customs code29130000
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)26-37/39
Storage class11 - Combustible Solids
Target organsRespiratory system
GHS hazard statementsH315-H319-H335
Hazard classEye Irrit. 2Skin Irrit. 2STOT SE 3
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338

Applications & Uses

Uses

5-Bromo-2-hydroxy-3-methoxybenzaldehyde may be employed for the following syntheses:ailanthoidol, via Stille coupling6-bromo-8-methoxy-3-(methoxycarbonyl)-2H-chromen-2-onebenzimidazole-based ligand, 2-(1H-benzoimidazol-2-yl)-4-bromo-6-methoxy-phenol (HL)chromogenic reagent, 5-bromo-2-hydroxy-3-methoxybenzaldehyde-p-hydroxy benzoic hydrazone(E)-N′-(5-bromo-2-hydroxy-3-methoxybenzylidene)-2-hydroxybenzohydrazide monohydrate