Dimethyl Oxalate (CAS 553-90-2), often abbreviated as DMO, is a colorless crystalline solid or molten liquid ester produced via the carbonylation of methanol, primarily utilized as a versatile building block in the synthesis of pharmaceuticals, agrochemicals, and high-purity glycolic acid. This Oxalic acid dimethyl ester compound functions as a critical acylation agent and precursor in Dimethyl ethanedioate based reactions, facilitating the production of Vitamin B6, sulfadoxine, and various heterocyclic compounds used in crop protection. To support industrial-scale requirements, we provide bulk supply with competitive factory pricing and ensure rigorous quality control through customized specifications alongside standard technical documentation, including MSDS, TDS, COA.
Dimethyl Oxalate CAS 553-90-2
- CAS: 553-90-2
- Synonyms: Dimethyl ethanedioate, Methyl oxalate, Oxalic acid dimethyl ester, Ethanedioic acid dimethyl ester, DMO
- Einecs: 209-053-6
- Molecular Formula: C4H6O4
- Grade: Industrial grade 99%
- Package: 200kg iron drum or 50kg plastic drum packing
Product Description
Dimethyl oxalate, also known as dimethyl glyoxate, is an organic compound with the chemical formula C4H6O4, mainly used in organic synthesis, and can also be used as a plasticizer.
Alias：Dimethyl glyoxate
chemical formula：C4H6O4
molecular weight：118.088
CAS login number：553-90-2
EINECS login number：209-053-6
Density: 1.148g/cm3
Melting point: 50-54°C
Boiling point: 163.5°C
Flash point: 75°C
Refractive index: 1.39 (20°C)
Saturated vapor pressure: 0.13kPa (20°C)
Appearance: Colorless crystalline powder
Solubility: slightly soluble in cold water, soluble in ethanol, ether, etc
use：It is mainly used in organic synthesis and can also be used as a plasticizer.
Safety information
Security terminology
S24/25：Avoid contact with skin and eyes.
Avoid skin and eye contact.
S26：In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Immediately after eye contact, rinse with plenty of water and seek a doctor’s opinion.
S36/37：Wear suitable protective clothing and gloves.
Wear appropriate protective clothing and gloves.
Risk terminology
R36/38：Irritating to eyes and skin.
Irritation of eyes and skin.
FAQ - Technical & Supply Chain
-
Q:
Is Dimethyl Oxalate (CAS 553-90-2) soluble in water?
A: DMO is soluble in alcohol and ether but hydrolyzes rapidly in the presence of water to form methanol and oxalic acid; therefore, it must be stored in strictly dry conditions (C4H6O4) to maintain its ester structure. -
Q:
What is the role of DMO in the coal-to-chemicals industry?
A: It serves as the pivotal intermediate in the hydrogenation process to produce Ethylene Glycol (MEG) from coal-derived syngas, offering a non-petroleum route to polyester raw materials.
Documents and Product Support
For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.
- COA for batch-based quality reference
- TDS for key physical and chemical information
- SDS / MSDS for handling, storage, and safety reference
- Packing information for sample, trial, and bulk orders
- Technical communication based on application and specification requirements
Information to Confirm Before Quotation
Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.
- Product name and CAS number
- Application or intended end use
- Required purity, grade, or specification
- Sample quantity, trial order, or bulk demand
- Preferred packing form or net weight
- Destination country or port
- Required documents or compliance expectations
Packaging, Storage, and Handling Notes
Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.
Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.
Sample, Bulk Order and Repeat Supply Support
Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.
For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.
