3-Methylpiperidine Property

Melting point:

-24 °C

Boiling point:

125-126 °C/763 mmHg (lit.)

Density 

0.845 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.447(lit.)

Flash point:

63 °F

storage temp. 

Flammables area

pka

pK1:11.07(+1) (25°C)

form 

clear liquid

color 

Colorless to Light yellow to Light orange

Water Solubility 

miscible

BRN 

79807

CAS DataBase Reference

626-56-2(CAS DataBase Reference)

NIST Chemistry Reference

Piperidine, 3-methyl-(626-56-2)

EPA Substance Registry System

Piperidine, 3-methyl- (626-56-2)

Safety

Hazard Codes 

F,Xi

Risk Statements 

11-36/37/38

Safety Statements 

16-23-33-26-7/9

RIDADR 

UN 1993 3/PG 2

WGK Germany 

3

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

HS Code 

29333990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

3-Methylpiperidine Chemical Properties,Usage,Production

Chemical Properties

clear colorless to yellow liquid

Uses

3-Methylpiperidine, is used as a reactant for synthesis of Phenylpropenamide derivatives for anti-hepatitis B virus activity, CB2 receptor agonists for treatment of chronic pain, aurora kinase inhibitors, spiroimidazolidinone NPC1L1 inhibitors, 1,3,5-Oxadiazinones, selective serotonin 5-HT6 receptor antagonists. It is also used as a pharmaceutical intermediate and as a intermediate in organic synthesis.

General Description

A colorless liquid with a characteristic odor. Less dense than water. Flash point less than 141°F. Contact may cause severe irritation to skin, eyes, and mucous membranes. Toxic by ingestion, inhalation and skin absorption.

Air & Water Reactions

Highly flammable. Water soluble.

Reactivity Profile

3-METHYLPIPERIDINE neutralizes acids to form salts plus water in exothermic reactions. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Generates flammable gaseous hydrogen in combination with strong reducing agents, such as hydrides.

Health Hazard

May cause toxic effects if inhaled or ingested/swallowed. Contact with substance may cause severe burns to skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Purification Methods

Purify it via the hydrochloride (m 172o). The hydrobromide has m 162-163o(from iso-PrOH). [Chapman et al. J Chem Soc 1925 1959, Beilstein 20 III/IV 1499, 20/4 V 100.]