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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 2776844Generated: October 23, 2026

Pyridine-4-amidine hydrochloride

4-AMIDINOPYRIDINE HYDROCHLORIDE · ISONICOTINAMIDINE HYDROCHLORIDE · BUTTPARK 32\03-56 · 4-Amidinopyridinium chloride · 4-methylamidinopyridine chloride · 4-AMIDINOPYRIDINIUM HYDROCHLORIDE · Isonicotinimidamide xhydrochloride · PYRIDINE-4-CARBOXIMIDAMIDE HYDRATE HCL

https://huagongshe.com/en/chemical/2776844

Pyridine-4-amidine hydrochloride molecular structure

Identifiers & Physical Properties

CAS No.42518-06-9
Molecular formulaC6H8ClN3
Average molar mass157.6 g/mol
Monoisotopic mass157.040675 g/mol
SMILESCl.N=C(N)c1ccncc1
InChIKeyIONKMFGAXKCLMI-UHFFFAOYSA-N
PubChem CID2776844
EC No.692-231-4

Chemical & Physical Properties

Topological polar surface area62.8
Hydrogen bond donors3
Hydrogen bond acceptors2
Rotatable bonds1
Heavy atoms10
Formal charge0
Complexity105
Melting point263 °C
Storage conditionsInert atmosphere,Room Temperature
AppearanceWhite to off-white Solid
InChIInChI=1S/C6H7N3.ClH/c7-6(8)5-1-3-9-4-2-5/h1-4H,(H3,7,8)1H
InChIKeyIONKMFGAXKCLMI-UHFFFAOYSA-N
SMILESC(C1=CC=NC=C1)(N)=N.Cl
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H312-H315-H319-H332-H335
GHS precautionary statementsP233-P260-P261-P264-P270-P271-P280-P301+P312-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P322-P330-P332+P313-P337+P313-P340-P362-P363-P403-P403+P233-P405-P501
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-37/39
Hazard classIRRITANT
Customs code29333990

Safety & Regulations

GHS classificationWarningH302+H312+H332 (100%): Harmful if swallowed, in contact with skin or if inhaled [Warning Acute toxicity, oralacute toxicity, dermalacute toxicity, inhalation]H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]H312 (100%): Harmful in contact with skin [Warning Acute toxicity, dermal]H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H332 (100%): Harmful if inhaled [Warning Acute toxicity, inhalation]H335 (100%): 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, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory.
Hazard Classes and CategoriesAcute Tox. 4 (100%)Skin Irrit. 2 (100%)Eye Irrit. 2 (100%)STOT SE 3 (100%)
Customs code29333990
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)26-37/39
Hazard classIRRITANT
GHS hazard statementsH302-H312-H315-H319-H332-H335
GHS precautionary statementsP233-P260-P261-P264-P270-P271-P280-P301+P312-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P322-P330-P332+P313-P337+P313-P340-P362-P363-P403-P403+P233-P405-P501