3-Methyl-3-buten-2-one

CAS NO.：814-78-8
Empirical Formula: C5H8O
Molecular Weight: 84.12
MDL number: MFCD00059207
EINECS: 212-405-1
SAFETY DATA SHEET (SDS)
Update Date: 2023-10-23 16:55:13

What is 3-Methyl-3-buten-2-one ?

Chemical properties

Colorless or light yellow transparent liquid

The Uses of 3-Methyl-3-buten-2-one

Plastics.

Definition

ChEBI: 3-Methyl-3-buten-2-one is an olefinic compound. It is functionally related to an acrylic acid.

Production Methods

3-Methyl-3-buten-2-one is produced by acid-catalyzed condensation of 2-butanone with formaldehyde in the liquid phase. A further possibility is the methylolization of 2- butanone under alkaline conditions followed by elimination of water:
3-Methyl-3-buten-2-one synthesis

General Description

A clear colorless liquid. Flash point of 52°F. Denser than water and insoluble in water. Hence sinks in water. Vapors heavier than air.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

3-Methyl-3-buten-2-one tends to polymerize; this reaction is mostly suppressed by the inhibitor. Can polymerize if heated or contaminated. If confined in a container when polymerization is initiated, the container may violently rupture [USCG, 1999].

Hazard

Flammable, dangerous fire risk, explosivelimits in air 1.8–9.0%.

Health Hazard

Inhalation causes irritation of nose and throat. Liquid may cause severe damage to eyes, resulting possibly in some permanent impairment of vision; vapor produces tears. If not removed promptly from skin, liquid may cause delayed pain and blistering. Ingestion causes irritation of mouth and stomach.

Fire Hazard

Behavior in Fire: May polymerize and explode.

Chemical Reactivity

Reactivity with Water: No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Will polymerize in the absence of inhibitor, especially when heated; Inhibitor of Polymerization: Up to 1% hydroquinone.

Safety Profile

Poison by ingestion and skin contact. Moderately toxic by inhalation and intraperitoneal routes. A skin and severe eye irritant. A dangerous fire hazard when exposed to heat or flame. Explosive in the form of vapor when exposed to heat or flame. When heated to decomposition it emits acrid smoke and irritating fumes.

Properties of 3-Methyl-3-buten-2-one

Melting point:	-54°C
Boiling point:	98°C
Density	0,86 g/cm³
refractive index	1.4210 to 1.4250
Flash point:	9°C
storage temp.	Freezer
Water Solubility	Slightly soluble in water
solubility	Chloroform (Sparingly), Ethyl Acetate (Slightly), Methanol (Slightly)
form	clear liquid
color	Colorless to Light yellow
Odor	Very pungent; pleasant; sweet.
CAS DataBase Reference	814-78-8
NIST Chemistry Reference	3-Buten-2-one, 3-methyl-(814-78-8)
EPA Substance Registry System	3-Buten-2-one, 3-methyl- (814-78-8)

Safety information for 3-Methyl-3-buten-2-one

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P270:Do not eat, drink or smoke when using this product. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P312:Call a POISON CENTER or doctor/physician if you feel unwell. P330:Rinse mouth. P302+P352:IF ON SKIN: wash with plenty of soap and water. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P403+P233:Store in a well-ventilated place. Keep container tightly closed.