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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 278389Generated: October 23, 2026

5-Hydroxy-2-pyridinecarboxaldehyde

5-hydroxypicolinaldehyde · 2-ForMyl-5-hydroxypyridine · NSC 129151 · NSC 127948 · 3-fluoropropanoic · 6-Formyl-3-pyridinol · 5-Hydroxy-2-formylpyridine · 5-HYDROXYPYRIDINE-2-CARBAL

https://huagongshe.com/en/chemical/278389

5-Hydroxy-2-pyridinecarboxaldehyde molecular structure

Identifiers & Physical Properties

CAS No.31191-08-9
Molecular formulaC6H5NO2
Average molar mass123.11 g/mol
Monoisotopic mass123.0320284 g/mol
SMILESO=Cc1ccc(O)cn1
InChIKeyHSODMUBHOXGNNQ-UHFFFAOYSA-N
PubChem CID278389
EC No.826-139-4
DTXSIDDTXSID50299068

Chemical & Physical Properties

XLogP0.3
Topological polar surface area50.2
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds1
Heavy atoms9
Formal charge0
Complexity105
Melting point223-225 °C (decomp)
Boiling point363.5±22.0 °C(Predicted)
Density1.327±0.06 g/cm3 (20 ºC 760 Torr)
Storage conditionsunder inert gas (nitrogen or Argon) at 2-8°C
pKa (acidity coefficient)3.17±0.18(Predicted)
Physical statesolid
ColorLight brown to brown
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302+H312+H332-H315-H319-H335
GHS precautionary statementsP261-P271-P280
Customs code2933399990

Safety & Regulations

GHS classificationWarningH302 (80%): Harmful if swallowed [Warning Acute toxicity, oral]H315 (80%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (60%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 5 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Hazard Classes and CategoriesAcute Tox. 4 (80%)Skin Irrit. 2 (80%)Eye Irrit. 2 (100%)STOT SE 3 (60%)
Customs code2933399990
Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH302+H312+H332-H315-H319-H335
GHS precautionary statementsP261-P271-P280