Zhejiang Realsun Chemical Co., Ltd. is one of the most reliable manufacturers and suppliers of dimethyl oxalate in China. If you're going to buy high quality dimethyl oxalate, welcome to get pricelist and free sample from our factory. Good service and low price are available.
- Chinese alias: Dimethyl oxalate, Dimethyl oxalate
Dimethyl Oxalate (DMO) is a reactive diester intermediate used in esterification, transesterification and condensation reactions. It is supplied for industrial applications in pharmaceutical, agrochemical, polymer and coatings manufacturing.
The product is manufactured using a continuous distillation process designed to maintain consistent batch quality and control key impurities.
Key Product Information
|
Item |
Specification |
|
Product Name |
Dimethyl Oxalate |
|
Common Name |
DMO |
|
CAS No. |
553-90-2 |
|
Molecular Formula |
C₄H₆O₄ |
|
Appearance |
White crystalline solid at room temperature |
|
Melting Behavior |
Melts into a colorless, clear liquid above 54°C |
|
Commercial Grade |
Industrial Grade |
|
Assay Purity |
≥99.5% |
Grade Availability: Industrial grade is currently supplied for bulk orders. Electronic-grade and pharmaceutical-grade products are not available for mass production. Small quantities of ultra-high-purity samples can be customized for laboratory evaluation.
Technical Specifications
Each commercial batch is supplied with a batch-specific COA including complete GC test results.
|
Test Item |
Industrial Grade Specification |
|
Assay Purity |
≥99.50% |
|
Density at 55°C, Liquid |
1.140–1.142 g/cm³ |
|
Boiling Point at Atmospheric Pressure |
163.5°C |
The continuous distillation process is used to maintain consistent product specifications and control key impurities across production batches.
Applications
1. Pharmaceutical & Fine Chemical Manufacturing
Dimethyl oxalate is used as a reactive intermediate in the industrial synthesis of pharmaceuticals and fine chemicals, including applications involving antibiotics, Vitamin B13 and antifungal heterocyclic compounds.
Its diester structure supports condensation and transesterification reactions and can be incorporated into downstream synthesis routes.
For Pharmaceutical Manufacturers
Residual methanol and other impurities can affect downstream synthesis and the impurity profile of active pharmaceutical ingredients.
The production process is designed to control methanol residue, with a specified methanol residual level of ≤180 ppm. This supports direct use in standard pharmaceutical synthesis without an additional purification step under the stated application conditions.
Customers requiring a lower residual specification can request customized samples for process evaluation.
2. Agrochemical Manufacturing
Dimethyl oxalate is used as an upstream synthetic raw material for agrochemical products, including herbicides and triazole fungicides.
It can participate in the construction of active molecular structures and is used in downstream synthesis where controlled raw material quality is required.
For Agrochemical Manufacturers
Batch-to-batch impurity variation can affect downstream synthesis and product consistency.
Consistent distillation and batch quality control help provide a more stable raw material specification for customers conducting agrochemical production and overseas registration.
3. Polymers & Coatings
Dimethyl oxalate can be used in polymer and specialty chemical applications, including:
• Cellulose-related polymer applications
• Plasticizer systems for biodegradable polyesters
• Photoresist intermediates
• Polyimide modification
• Specialty synthetic resin systems
It can also be used as a raw material in specialty resin synthesis where controlled chemical reactivity and consistent raw material quality are required.
Application Considerations
For manufacturers evaluating alternatives to conventional aromatic plasticizers and related materials, regulatory requirements in overseas markets need to be considered during raw material selection.
Dimethyl oxalate is positioned for industrial applications where controlled specifications and overseas compliance requirements are important.
Quality & Regulatory Documentation
U.S. TSCA Status
Dimethyl oxalate is listed on the existing U.S. TSCA chemical substance inventory. Based on this inventory status, an additional PMN submission is not required for the substance.
Relevant regulatory documentation can be provided for customer import and compliance review.
Production Site & EHS Support
The production facility maintains the required environmental assessment, production safety and pollutant discharge documentation.
The facility can support EHS supplier audits by overseas pharmaceutical, agrochemical and coatings manufacturers according to customer requirements.
Documentation Available
Each shipment can be supplied with:
• Chinese and English GHS-compliant SDS/MSDS
• Batch-specific COA
• Original GC test chromatograms
• Manufacturer qualification documents
• Certificate of Origin
• SGS or Intertek third-party testing reports upon request
These documents can support customer supplier qualification, import review and internal quality-control procedures.
Production & Supply Capability
Production Capacity
The production facility has an approved 8,000-ton-per-year Dimethyl Oxalate production capacity and is currently in the ramp-up stage of commercial production.
A continuous distillation process is used to support stable year-round production.
Upstream oxalic acid and methanol are sourced through nearby supporting production facilities, reducing dependence on external trading intermediaries for key raw materials.
Inventory
The production site maintains sealed, corrosion-resistant storage tanks and safety stock for regular orders.
Available supply formats include:
• 25 kg sample orders
• 200 kg standard drum orders
• 1,000 kg IBC orders
• Full-container orders
Supply Agreements
For qualified overseas customers, the following cooperation models can be considered:
• 1–3-year annual framework agreements
• Annual price-lock arrangements
• Delivery commitment agreements
• Credit-term qualification for eligible customers
Long-term customers can receive production scheduling priority during periods of higher demand.
Lead Time
Domestic stock: Generally available for dispatch within 3 days.
Export orders: Hazardous chemical declaration and customs clearance can generally be completed within 7–10 days, subject to order quantity, documentation and shipping schedules.
Shipments can be arranged from Chinese ports to major destinations in Europe, Southeast Asia, Japan, South Korea and other international markets, subject to applicable transportation and import requirements.
Packaging
Dimethyl oxalate is readily crystalline at normal temperatures. Export packaging is therefore designed to provide moisture protection and minimize handling-related leakage during transportation.
R&D Samples
• 25 kg PE-lined woven bags or plastic drums
• Sealed moisture-resistant packaging
Standard Export Orders
• 200 kg heavy-duty corrosion-resistant plastic drums
• Double-layer sealing gaskets
• Packaging designed to minimize leakage during low-temperature crystallization
Large-Volume Long-Term Orders
• 1,000 kg sealed IBC containers
• Insulated inner lining available for suitable bulk orders
International Logistics
Moisture & Packaging Protection
Export packaging is sealed and designed to protect the product from moisture and light.
Under normal ocean transportation conditions of approximately 45 days, the packaging is designed to minimize moisture absorption and product loss when properly handled.
Hazardous Chemical Shipping Support
A dedicated international trade team supports applicable hazardous chemical declarations and maritime filing procedures.
Transportation Options
• Full-container-load ocean freight
• LCL ocean freight
• Air freight for samples
Chemical cargo insurance can be arranged for international shipments according to customer requirements.
Storage
Store in a dry, sealed warehouse under normal temperature conditions.
Avoid prolonged exposure to low temperatures that may result in extensive crystallization and affect handling.
Handling & Temperature Considerations
Dimethyl oxalate is a crystalline solid at room temperature and melts into a clear, colorless liquid at temperatures above 54°C.
During long-distance transportation in cold environments, crystallization may occur. This does not indicate a change in product purity or water content.
After arrival, the product can be heated above 55°C to return it to a fully molten state before use.
For bulk handling, customers should consider the ambient temperature and required heating conditions when planning storage, unloading and material transfer.
Purchasing Information
|
Purchasing Requirement |
Available Option |
|
Laboratory Evaluation |
25 kg sample |
|
Standard Order |
200 kg drums |
|
Bulk Supply |
1,000 kg IBC |
|
Large-Volume Supply |
Full-container order |
|
Long-Term Supply |
1–3-year framework agreement |
For quotation and technical evaluation, customers are recommended to provide:
• Required purity
• Application
• Estimated order quantity
• Packaging requirement
• Destination country
• Required documentation
• Estimated annual demand
• Any specific impurity limits
Providing these details allows the supply team to confirm the appropriate specification, packaging and delivery arrangement.
FAQ
Is Dimethyl Oxalate available in electronic grade or pharmaceutical grade?
+
-
The current commercial product is supplied as industrial grade. There is no mass-production line for electronic-grade or pharmaceutical-grade Dimethyl Oxalate.
For high-purity requirements in semiconductor or pharmaceutical applications, small quantities of customized laboratory samples can be provided for evaluation. Stable bulk supply of these grades is not currently available.
For conventional pharmaceutical, agrochemical, polymer and resin production, the industrial-grade specification can be evaluated according to the customer's process requirements.
What is the methanol residual specification?
+
-
The production process is designed to control residual methanol at ≤180 ppm.
This specification is intended to support downstream applications where residual methanol control is important. Customers requiring a lower residual level can submit their target specification for technical evaluation and customized sample testing.
Will residual methanol affect downstream pharmaceutical API testing?
+
-
Controlled residual methanol can help reduce the risk of downstream impurity-related issues.
For applications with specific EP, USP or customer-specific impurity requirements, the complete target specification should be reviewed before commercial use.
Can you provide batch-specific COA and GC data?
+
-
Yes. Each commercial shipment is supplied with a batch-specific COA, including complete GC test results and original chromatograms.
Can Dimethyl Oxalate be supplied under a long-term price-lock agreement?
+
-
Yes. For qualified customers, 1–3-year annual framework agreements can be considered, including agreed pricing and delivery arrangements based on forecast demand and commercial terms.
Will Dimethyl Oxalate be affected by low temperatures during ocean transportation?
+
-
Dimethyl oxalate can crystallize under low-temperature conditions because it is a crystalline solid at normal temperatures. Crystallization during transportation does not indicate a change in purity or water content. After arrival, heating the material above 55°C will return it to a fully molten state for handling and use.
Will crystallization cause leakage during transportation?
+
-
Export packaging uses sealed, moisture-resistant packaging and double-layer sealing structures designed to minimize leakage during transportation and temperature changes.
Customers should follow appropriate handling procedures when receiving and transferring crystallized material.
What documents are available for overseas shipments?
+
-
Standard documentation includes:
• Chinese and English GHS-compliant SDS/MSDS
• Batch-specific COA • Original GC chromatograms
• Manufacturer qualification documents
• Certificate of Origin
SGS or Intertek third-party testing reports can also be provided upon request.
What packaging options are available?
+
-
Standard options include 25 kg PE-lined woven bags or plastic drums for samples, 200 kg corrosion-resistant plastic drums for regular export orders, and 1,000 kg IBC containers for bulk supply.
Insulated packaging can be considered for suitable large-volume orders.
What information should I provide when requesting a quotation?
+
-
Please provide the required purity, application, estimated quantity, destination country, packaging requirements, required documentation and any specific impurity limits.
For long-term supply projects, annual demand forecasts are also recommended.
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