Dimethyl Oxalate (DMO) is an oxalic-acid dimethyl ester used as an intermediate in organic-synthesis and process-development work. Confirm physical form, analytical requirements, and handling needs for the intended process.
Dimethyl Oxalate (DMO) CAS 553-90-2
- CAS: 553-90-2
- Synonyms: DMO; Dimethyl oxalate; Oxalic acid dimethyl ester; Dimethyl ethanedioate
- Einecs: 209-053-6
- Molecular Formula: C₄H₆O₄
- Grade: Confirm the current product-specific specification.
- Package: Confirm packaging with the requested quantity and destination requirements.
Product Description
Dimethyl Oxalate (DMO) is the dimethyl ester of oxalic acid identified by CAS 553-90-2 and EC/EINECS 209-053-6.
Synonyms: DMO; Dimethyl oxalate; Oxalic acid dimethyl ester; Dimethyl ethanedioate.
CAS: 553-90-2.
Molecular formula: C₄H₆O₄.
Molecular weight: 118.09 g/mol.
EC number: 209-053-6.
At room temperature it is a colorless to white crystalline solid.
DMO is mainly used as a C1 platform intermediate in catalytic synthesis; hydrogenation over copper or silver catalysts converts it to ethylene glycol, methyl glycolate, or ethanol.
It can also be a route to oxalic acid, oxamide, and dimethyl carbonate, and is used in organic synthesis, dyes, pharmaceuticals, agrochemicals, and selected polymer or fuel-cell applications.
Confirm assay, moisture, acidity, and related ester or oxalic impurities for catalytic or downstream processes.
Confirm the current product-specific specification.
Confirm packaging with the requested quantity and destination requirements.
Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.
Regulated-use suitability must be confirmed separately with current product-specific documentation.
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FAQ - Technical & Supply Chain
-
Q:
What is Dimethyl Oxalate (DMO) CAS 553-90-2?
A: Dimethyl Oxalate, commonly abbreviated DMO, is the dimethyl ester of oxalic acid with CAS 553-90-2 and molecular formula C₄H₆O₄. It is also called oxalic acid dimethyl ester or dimethyl ethanedioate. At room temperature it is a colorless to white crystalline solid. -
Q:
What is DMO mainly used for?
A: DMO is mainly used as a C1 platform intermediate in catalytic synthesis. Hydrogenation over copper or silver catalysts converts it to ethylene glycol, methyl glycolate, or ethanol, and it can also be a route to oxalic acid, oxamide, and dimethyl carbonate. It is used in organic synthesis, dyes, pharmaceuticals, agrochemicals, and selected polymer or fuel-cell applications. -
Q:
What grades and typical properties should be confirmed?
A: Common grades are around 99%, with some specifications reported as 98.0-99.0% by GC. Typical properties include a melting range near 50-54 °C, boiling point near 163.5 °C, density about 1.148 g/mL, slight cold-water solubility, and solubility in ethanol or ether. Confirm assay, moisture, acidity, and related ester or oxalic impurities for catalytic or downstream processes. -
Q:
How should DMO be stored and handled?
A: Store DMO in tightly closed containers in a cool, dry, ventilated area away from heat, ignition sources, strong oxidizers, and incompatible strong bases or acids. Avoid moisture ingress and dust generation. Use appropriate PPE and normal chemical-handling controls when weighing or charging the solid.
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