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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 2762994Generated: October 23, 2026

2-Chloro-4-pyridinecarboxaldehyde

2-chloro-3-forMylpyridine-4-carboxylic acid · oroisonicotinaL · BUTTPARK 154\50-03 · TIMTEC-BB SBB004156 · 2-Chloroisonicotinal · 2-Chloronicotinealdehyde · 2-CHLORO-4-FORMYLPYRIDINE · 2-CHLOROISONICOTINALDEHYDE

https://huagongshe.com/en/chemical/2762994

2-Chloro-4-pyridinecarboxaldehyde molecular structure

Identifiers & Physical Properties

CAS No.101066-61-9
Molecular formulaC6H4ClNO
Average molar mass141.55 g/mol
Monoisotopic mass140.9981414 g/mol
SMILESO=Cc1ccnc(Cl)c1
InChIKeyUFPOSTQMFOYHJI-UHFFFAOYSA-N
PubChem CID2762994
EC No.622-550-6
DTXSIDDTXSID90376645

Chemical & Physical Properties

XLogP1.3
Topological polar surface area30
Hydrogen bond donors0
Hydrogen bond acceptors2
Rotatable bonds1
Heavy atoms9
Formal charge0
Complexity107
Melting point46-50 °C
Boiling point243.4±20.0 °C(Predicted)
Density1.332±0.06 g/cm3(Predicted)
Flash point>230 °C
Storage conditionsunder inert gas (nitrogen or Argon) at 2-8°C
Physical statepowder to crystal
pKa (acidity coefficient)-1.23±0.10(Predicted)
ColorWhite to Almost white
SensitivityAir Sensitive
BRN7986625
InChIInChI=1S/C6H4ClNO/c7-6-3-5(4-9)1-2-8-6/h1-4H
InChIKeyUFPOSTQMFOYHJI-UHFFFAOYSA-N
SMILESC1(Cl)=NC=CC(C=O)=C1
CAS DataBase Reference101066-61-9(CAS DataBase Reference)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H317-H319-H335
GHS precautionary statementsP280-P301+P312+P330-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Hazard symbolsXn,Xi
Risk statements (R)22-36-43-36/37/38-20/21/22-42/43
Safety statements (S)26-36/37-36/37/39-22-45-23
Water hazard class (WGK)3
Hazard NoteHarmful
Hazard classIRRITANTAcute Tox. 4 OralEye Irrit. 2Skin Irrit. 2Skin Sens. 1STOT SE 3
Customs code2933399990
Storage class10 - Combustible liquids

Safety & Regulations

GHS classificationWarningH302 (87%): Harmful if swallowed [Warning Acute toxicity, oral]H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]H317 (87%): May cause an allergic skin reaction [Warning Sensitization, Skin]H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (97.8%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]P261, P264, P264+P265, P270, P271, P272, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 46 reports by companies from 6 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 (87%)Skin Irrit. 2 (100%)Skin Sens. 1 (87%)Eye Irrit. 2A (100%)STOT SE 3 (97.8%)
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Water hazard class (WGK)3
Customs code2933399990
Risk statements (R)22-36-43-36/37/38-20/21/22-42/43
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXn,Xi
hazard_noteHarmful
Safety statements (S)26-36/37-36/37/39-22-45-23
Hazard classIRRITANTAcute Tox. 4 OralEye Irrit. 2Skin Irrit. 2Skin Sens. 1STOT SE 3
Storage class10 - Combustible liquids
Target organsRespiratory system
GHS hazard statementsH302-H315-H317-H319-H335
GHS precautionary statementsP280-P301+P312+P330-P302+P352-P305+P351+P338

Applications & Uses

Uses

2-Chloropyridine-4-carboxaldehyde is a reagent used in the chemoenzymic synthesis of α-fluoro β-hydroxy carboxylic esters. It is also a reagent in the combinatorial synthesis of methylene sulfonamides and related compounds as potential kinase inhibitors.