4-Pyridinealdoxime Chemical Properties

Melting point:

131-133 °C

Boiling point:

227.52°C (rough estimate)

Density 

1.2236 (rough estimate)

vapor pressure 

<0.01 hPa (50 °C)

refractive index 

1.5350 (estimate)

Flash point:

110 °C

storage temp. 

Store below +30°C.

solubility 

10g/l

pka

pK1:4.73(+1);pK2:10.03(0) (25°C)

form 

Solid

color 

White to Off-White

PH

6.3 (10g/l, H2O, 20℃)

Water Solubility 

10 g/L (20 ºC)

BRN 

2079

CAS DataBase Reference

696-54-8(CAS DataBase Reference)

NIST Chemistry Reference

4-Pyridinecarboxaldehyde, oxime(696-54-8)

Safety Information

Hazard Codes 

Xn

Risk Statements 

20/22-36/37/38-20/21/22

Safety Statements 

26-36-37/39

WGK Germany 

3

RTECS 

NR9410000

HS Code 

29333999

Toxicity

LD50 orally in Rabbit: 655 mg/kg

MSDS

• Language:English Provider:4-Pyridinealdoxime
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

4-Pyridinealdoxime Usage And Synthesis

Chemical Properties

white very fine crystalline powder

Uses

It is employed as an intermediate for bis(hydroxyiminomethylpyridinium)butenes and as reactivators of chlorpyrifos-inhibited acetylcholinesterase. It is also used in the chromatographic separation and NMR characterization of the isomers of 1,1?-Methylenebis{4-[(hydroxyimino)methyl]pyridinium) dichloride.

Uses

An intermediate for bis(hydroxyiminomethylpyridinium)butenes as reactivators of chlorpyrifos-inhibited acetylcholinesterase.

Purification Methods

Crystallise the oxime from water. [Beilstein E-isomer 21 III/IV 3533, 21/7 V 355.]

4-Pyridinealdoxime(696-54-8)Related Product Information

• OBIDOXIME CHLORIDE
• N'-HYDROXYPYRIDINE-4-CARBOXIMIDAMIDE
• 4-Pyridinealdoxime
• POBN
• 1,1'-TRIMETHYLENE-BIS(4-FORMYLPYRIDINIUM BROMIDE) DIOXIME
• 2-PYRIDINEALDOXIME,SYM-2-PYRIDINEALDOXIME,syn-2-Pyridinealdoxime
• Pralidoxime Chloride
• 2-PYRIDINEALDOXIME METHIODIDE
• SYM-2-PYRIDINEALDOXIME,SYN-2-PYRIDINEALDOXIME, 99+%,2-PYRIDINEALDOXIME
• 3-PYRIDINEALDOXIME,3-PYRIDINEALDOXIME 98%
• FORMOXIME
• 4-Pyridinecarboxaldehyde
• Acetaldoxime
• 4-[CYANO(HYDROXYAMINO)METHYL]-1-METHYLPYRIDINIUM IODIDE
• AKOS B006530
• 2-PYRIDINEALDOXIME O-ISOAMYL ETHER
• 2-Pyridinealdoxime 1-methomethanesulfonate,2-PYRIDINEALDOXIME METHYL METHANESULFONATE
• 2-pyridinealdoxime methylsulfate