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674-82-8

674-82-8 structural image
Product Name: Acetyl ketene
Formula: C4H4O2
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Diketene, stabilized appears as a colorless liquid with a disagreeable odor. Slightly less dense than water. Irritates skin and eyes. Used to make paints and pharmaceuticals.
Color/Form Colorless liquid; turns brownish-yellow upon standing at room temperature
Odor Pungent odor
Boiling Point 127 °C
Melting Point -6.5 °C
Flash Point 93 °F (NFPA, 2010)
Solubility Very slightly soluble in water in which it decomposes slowly
Density 1.0877 g/cu cm at 20 °C
Vapor Density 2.9 (Air = 1)
Vapor Pressure 10.7 [mmHg]
Stability/Shelf Life Self-initiated exotermic dimerization is explosive.
Autoignition Temperature 590 °F (310 °C)
Decomposition Decomposes in water.
Viscosity 0.88 mPa.s
Heat of Vaporization 42.89 kJ/mol at 25 °C
Surface Tension 33.89 mN/m at 25 °C
Polymerization Readily polymerizes on standing.
Refractive Index Index of refraction: 1.4342 at 23 °C/D
Kovats Retention Index 709.2
Other Experimental Properties BP: 126-127 °C with slight decomposition; 69-71 °C at 100 mm Hg. MP: -7.5 °C
Chemical Classes Toxic Gases & Vapors -> Other Toxic Gases & Vapors

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Flame
Flammables
GHS02

Skull and Crossbones
Acute Toxicity
GHS06
GHS Hazard Statements H226:Flammable liquids
H302:Acute toxicity,oral
H331:Acute toxicity,inhalation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P403+P233:Store in a well-ventilated place. Keep container tightly closed.
P403+P235:Store in a well-ventilated place. Keep cool.

COMPUTED DESCRIPTORS

Molecular Weight 84.07 g/mol
XLogP3 0.3
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 2
Rotatable Bond Count 0
Exact Mass 84.021129366 g/mol
Monoisotopic Mass 84.021129366 g/mol
Topological Polar Surface Area 26.3 Ų
Heavy Atom Count 6
Formal Charge 0
Complexity 104
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Diketene, stabilized appears as a colorless liquid with a disagreeable odor. Slightly less dense than water. Irritates skin and eyes. Used to make paints and pharmaceuticals.

RELATED SUPPLIERS

Svak Life Sciences

1Y
product:674-82-8 / 6842-10-0 Diketene 98%
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