78-98-8

Methylglyoxal

Propanal,2-oxo-;Pyruvaldehyde;2-Oxopropanal;Acetylformaldehyde;Acetylformyl;α-Ketopropionaldehyde;Methylglyoxal;Pyroracemic aldehyde;Pyruvic aldehyde;2-Ketopropionaldehyde;2-Oxopropionaldehyde;NSC 626580;NSC 79019

78-98-8

C3H4O2

InChIKey=AIJULSRZWUXGPQ-UHFFFAOYSA-N

72.06

72.06

201-164-8

722KLD7415

626580|133493|133492|79019

1993

DTXSID0021628

Clear, yellow liquid|Yellow, hygroscopic liquid

2914400090

Heterocyclic Compound

34.1

-1.50 (est)

Clear yellow to yellow-brown Solution

1.0455 g/cm³ @ Temp: 24 °C

<25 °C

72 °C

2.5±4.4 °C

1.364

H2O: >=10 g/100 mL at 17 ºC;Miscible (est)

2-8°C

26.7 mm Hg at 25 deg C (est)

Pungent

1.72e-11 cm3/molecule*sec

2.70e-07 atm-m3/mole|Henry's Law constant = 2.70X10-7 atm-cu m/mol at 25 °C

Hygroscopic. Polymerizes very readily, forming a brittle, resinous mass.|Hydroxyl radical reaction rate constant = 1.72X10-11 cu cm/molec-sec at 25 °C

Water soluble.

Aldehydes

Polymerizable

METHYLGLYOXAL polymerizes readily. It is hygroscopic. This chemical is incompatible with strong oxidizing agents and bases. (NTP, 1992) METHYLGLYOXAL is an aldehyde. Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation.