Diethyl Oxalate

Zhejiang Realsun Chemical Co., Ltd. is one of the most reliable manufacturers and suppliers of diethyl oxalate in China. If you're going to buy high quality diethyl oxalate, welcome to get pricelist and free sample from our factory. Good service and low price are available.

 

Diethyl Oxalate (DEO) is a reactive diester building block used primarily in pharmaceutical and agrochemical synthesis, as well as selected polymer and coating applications.
Liansheng operates a dedicated 8,000-ton-per-year continuous synthesis and distillation line for Diethyl Oxalate. The product is commercially available in two purity grades:
• 99.5% - Standard Industrial Grade
• 99.9% - High-Purity Pharmaceutical Grade
The production process combines solid-acid esterification with multi-stage vacuum distillation to control residual ethanol, free oxalic acid and other key impurities.
Electronic-grade and injectable pharmaceutical-grade Diethyl Oxalate are not currently produced on a mass-production basis. For wafer-cleaning or other ultra-high-purity laboratory applications, small quantities of customized samples can be provided for evaluation, but long-term bulk supply is not currently available.

 

 

Item	Specification
Product Name	Diethyl Oxalate
Abbreviation	DEO
CAS No.	95-92-1
Molecular Formula	C₆H₁₀O₄
Appearance	Colorless, clear oily liquid
Odor	Mild ester-like odor
Available Purity	99.5% / 99.9%
Standard Grade	Industrial / Pharmaceutical Grade
Commercial Availability	99.5% and 99.9% bulk production
Electronic Grade	Not available for mass production
Injectable Pharmaceutical Grade	Not available for mass production

Diethyl oxalate is used as a reactive diester building block in condensation and transesterification reactions, with applications across pharmaceutical, agrochemical and specialty chemical manufacturing.

 

 

Each commercial batch is supplied with a batch-specific COA and complete GC test results.

Standard Industrial Grade

Test Item	Specification
Assay Purity	≥99.50%
Water Content	≤250 ppm
Color	≤15 APHA
Density at 20°C	1.077–1.082 g/cm³
Boiling Point at Atmospheric Pressure	185.4°C

The production process uses continuous synthesis and multi-stage distillation to maintain consistent batch specifications and control key impurities.
For customers requiring the 99.9% high-purity pharmaceutical grade, the applicable specification and documentation can be confirmed according to the intended application before order confirmation.

 

 

 

 

2. Agrochemical Manufacturing
Diethyl Oxalate is used as an upstream synthetic building block in agrochemical manufacturing, including applications involving:
• Triazole fungicides
• Selective herbicides
• Other agrochemical intermediates
It participates in downstream synthesis for constructing active molecular structures and is suitable for processes where consistent raw material quality is required.
For Agrochemical Manufacturers
Batch-to-batch variation in raw material purity or impurity levels can affect downstream synthesis and product consistency.
Controlled synthesis and continuous distillation provide consistent product specifications for customers conducting industrial agrochemical production.

 

3. Polymers & Coatings
Diethyl Oxalate can also be used in selected polymer and specialty coating applications.
Potential applications include:
• Polyimide-related synthesis
• Biodegradable polyester production
• Specialty synthetic resins
• Industrial coating systems
• Corrosion-resistant resin formulations
In specialty resin systems, Diethyl Oxalate can serve as a reactive raw material or synthesis component where controlled chemical properties are required.
Application Considerations
For overseas manufacturers, raw material selection may need to consider both process performance and market-specific regulatory requirements.
Diethyl Oxalate is positioned for industrial applications where controlled specifications and supply consistency are important.

 

 

U.S. TSCA Status
Diethyl 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 Linhai production facility maintains the required environmental assessment, production safety and pollutant discharge documentation.
The facility is certified to:
• ISO 9001
• ISO 14001
• ISO 45001
The production site can support EHS and GMP-related supplier audits by overseas pharmaceutical and agrochemical customers according to project requirements.

Documentation Available
Each commercial 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 impurity testing reports upon request
These documents can support supplier qualification, import review, quality control and customer audit procedures.

 

 

Dedicated Production Capacity
Liansheng operates a dedicated 8,000-ton-per-year Diethyl Oxalate continuous synthesis and distillation line.
The production system operates independently and can be switched to supporting co-production of ethylene carbonate and other products according to production planning.
Upstream esterification raw materials are sourced through nearby supporting facilities, reducing dependence on externally purchased crude ester intermediates.

Inventory
The production site uses dedicated temperature-controlled and corrosion-resistant storage tanks with separate storage areas.
Safety stock is maintained for regular customer orders.
Available supply formats include:
• 25 kg R&D samples
• 200 kg orders
• 1,000 kg IBC containers
• Full-container shipments

Supply Agreements
For qualified overseas customers, Liansheng can consider:
• 1–3-year annual framework agreements
• Annual price-lock arrangements
• Delivery commitment agreements
• Credit-term qualification for eligible customers
Long-term customers can also discuss production scheduling arrangements based on forecast 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 pharmaceutical and agrochemical markets in Europe, North America, Southeast Asia, Japan, South Korea and other international destinations, subject to applicable import and transportation requirements.

 

 

Diethyl Oxalate can undergo gradual hydrolysis when exposed to water. Export packaging is therefore designed to minimize moisture ingress during storage and transportation.
 R&D Samples
• 25 kg plastic drums
• Double-layer PE inner liner
• Light-protected and fully sealed packaging
• Moisture-resistant design
 Standard Export Orders
• 210 kg heavy-duty corrosion-resistant plastic drums
• Net weight: 180 kg per drum
• Double-layer hydrolysis-resistant sealing gaskets
 Large-Volume Orders
• 1,000 kg sealed IBC containers
• Insulated ISO tank containers available for suitable bulk orders
Packaging specifications can be reviewed according to destination-country requirements and transportation conditions.

 

 

Moisture Protection
Export packaging uses a sealed, light-protective and moisture-resistant structure designed to minimize exposure to air and water during transportation.
Under normal ocean transportation conditions of approximately 45 days, the packaging is designed to minimize moisture absorption and hydrolysis and help maintain the specified water content, residual ethanol and assay purity when properly handled.

Hazardous Chemical Shipping Support
A dedicated international trade team supports applicable hazardous chemical declarations, maritime filing and export documentation.

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 Conditions
Store in a dry, sealed warehouse under normal temperature conditions.
Keep away from water sources and strongly alkaline materials.
The product should be protected from conditions that may promote hydrolysis during storage.
 

 

Application	Recommended Grade
General Industrial Synthesis	99.5% Standard Grade
Agrochemical Manufacturing	99.5% / 99.9% according to process requirements
Pharmaceutical Synthesis	99.9% High-Purity Grade where required
Fine Chemical Manufacturing	99.5% / 99.9% according to process requirements
Laboratory Evaluation	Customized high-purity samples available
Semiconductor / Wafer Applications	No mass-produced electronic grade
Injectable Pharmaceutical Applications	No mass-produced injectable grade

For pharmaceutical or other regulated applications, customers should provide their required impurity profile and quality specifications before order confirmation.

 

 

For quotation and technical evaluation, overseas buyers are recommended to provide:
• Required purity: 99.5% or 99.9%
• Application
• Estimated order quantity
• Packaging requirement
• Destination country
• Required quality documents
• Specific impurity limits, if applicable
• Estimated annual demand for long-term supply
This information allows the supply team to confirm the appropriate grade, packaging, documentation and delivery arrangement.

 

 

 

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