2-Pyridinealdoxime methochloride

Molecular Structure of 2-Hydroxyiminomethyl-1-methylpyridinium chloride (CAS NO.51-15-0):

EINECS: 200-080-9
IUPAC Name: [(E)-(1-Methylpyridin-2-ylidene)methyl]-oxoazanium chloride 
Molecular Formula: C₇H₉ClN₂O
Molecular Weight: 172.612160 g/mol
H-Bond Donor: 1
H-Bond Acceptor: 3
Canonical SMILES: CN1C=CC=CC1=C[NH+]=O.[Cl-]
Isomeric SMILES: CN\1C=CC=C/C1=C\[NH+]=O.[Cl-]
InChI: InChI=1S/C7H8N2O.ClH/c1-9-5-3-2-4-7(9)6-8-10;/h2-6H,1H3;1H/b7-6+;
InChIKey: HIGSLXSBYYMVKI-UHDJGPCESA-N
Flash Point: 68.5 °C
Enthalpy of Vaporization: 42.59 kJ/mol
Boiling Point: 189.7 °C at 760 mmHg
Vapour Pressure: 0.562 mmHg at 25 °C
Melting Point: 230 °C(lit.)
Water Solubility: 65.5 g/100 mL at 25 °C
Storage Temp.: 0-6 °C
Classification Code: Agricultural Chemical; Cholinesterase reactivator; Human Data; Insecticide

 It can be used as antidote in organic phosphorus poisoning.

Safety Information of 2-Hydroxyiminomethyl-1-methylpyridinium chloride (CAS NO.51-15-0):
Hazard Codes: Xn 
Risk Statements: 20/21/22-36/37/38-20/22
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed
R36/37/38:Irritating to eyes, respiratory system and skin
R20/21:Harmful by inhalation and in contact with skin
Safety Statements: 36-37/39-26
S36:Wear suitable protective clothing
S37/39:Wear suitable gloves and eye/face protection
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
WGK Germany: 3
RTECS: UU4200000
Poison by intravenous, intramuscular, and intraperitoneal routes. Moderately toxic by ingestion. Human systemic effects by intravenous route: coma, blood pressure increase, bronchiolar constriction and cyanosis. Used as a cholinesterase reactivator. When heated to decomposition it emits very toxic fumes of Cl⁻ and NO_x.

  2-Hydroxyiminomethyl-1-methylpyridinium chloride with CAS registry number of 51-15-0 is white - off-white crystalline powder. It is incompatible with strong oxidizing agents, strong bases. When heated to decomposition, it yields Hydrogen chloride , Nitrogen oxides, Carbon monoxide , Carbon dioxide . 2-Hydroxyiminomethyl-1-methylpyridinium chloride is also known as Pralidoxime chloride [USAN] ; 1-Methyl-2-aldoximinopyridinium chloride ; 1-Methyl-2-formylpyridinium chloride oxime ; 1-Methyl-2-pyridinium aldoxime chloride ; 2-(Hydroxyiminomethyl)-1-methylpyridinium chloride ; 2-Formyl-1-methylpyridinium chloride oxime ; 2-Formyl-N-methylpyridinium oxime chloride ; 2-PAM ; 2-PAM chloride ; 2-Pyridine aldoxime methyl chloride ; 2-Pyridine-aldoxime chloride ; ComboPen ; N-Methylpyridine-2-aldoxime chloride ; N-Methylpyridinium chloride 2-aldoxime ; N-Methylpyridinium-2-aldoxime chloride ; N-Metylpyridinium-2-aldoxime chloride ; Pralidoxime chloride ; Pralidoxine chloride ; Protopam chloride ; Pyridine-2-aldoxime methochloride ; Pyridinium aldoxime methochloride ; Pyridinium, 2-((hydroxyimino)methyl)-1-methyl-, chloride ; Pyridinium, 2-formyl-1-methyl-, chloride, oxime .