oxomalonic acid

CAS No. 473-90-5

Formula: C3H2O5
Basic Info

Mesoxalic acid, also called oxomalonic acid or ketomalonic acid, is an organic compound with formula C3H2O5 or HO-(C=O)3-OH.
Mesoxalic acid is both a dicarboxylic acid and a ketonic acid. It readily loses two protons to yield the divalent anion C3O52−, called mesoxalate, oxomalonate, or ketomalonate. These terms are also used for salts containing this anion, such as sodium mesoxalate, Na2C3O5); and for esters containing the -C3O5- or -O-(C=O)3-O- moiety, such as diethyl mesoxalate, C2H5)2C3O5. Mesoxalate is one of the oxocarbon anions, which (like carbonate CO32− and oxalate C2O42−) consist solely of carbon and oxygen.
Mesoxalic acid readily absorbs and reacts with water to form a product commonly called "mesoxalic acid (mono)hydrate", more properly dihydroxymalonic acid, HO-(C=O)-C(OH)2-(C=O)-OH. In product catalogs and other contexts, the terms "mesoxalic acid", "oxomalonic acid", etc. often refer to this "hydrated" compound. In particular, the product traded as "sodium mesoxalate monohydrate" is almost always sodium dihydroxymalonate.

Formula
C3H2O5
Molecular Weight
118.045
Exact Mass
117.99
LogP
-1.2753
PSA
91.67
Synonyms

Oxopropanedioic acid

MESOXALIC ACID

Mesoxalate

2-Oxomalonsaeure

2-oxopropanedioic acid

2-Oxomalonic acid

2-ketomalonic acid

dicarboxylic ketone

Oxomalonic acid

Ketomalonic acid

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Properties
Density
1.832g/cm3
Boiling Point
405.2ºC at 760mmHg
Flash Point
213ºC
Refractive Index
1.504
Vapor Pressure
1.06E-07mmHg at 25°C
Safety Info
HS Code
2918300090
Spectrum
NMR Spectrum 1H NMR : Predict
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