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Name: Dimethyl Oxalate
Chemical Formula: C4H6O4
Appearance: Colorless solid, sometimes seen as a crystalline substance with a mild odor
Uses: Intermediate in chemical synthesis, specialty solvents, and at times a building block in polymer manufacturing or pharmaceutical production
Hazard Class: Irritant
Risks: Exposure can irritate eyes, skin, and respiratory tract; higher concentrations or poorly ventilated workspaces might elevate health risks, especially if vapors build up
Chronic Exposure: Prolonged inhalation or skin contact can aggravate pre-existing respiratory or skin conditions
Main Component: Dimethyl Oxalate, typically at purity levels above 99% in most laboratory or industrial batches
Impurities: May contain trace levels of methanol or oxalic acid, though reputable suppliers keep those minimal and analytical tests confirm purity regularly
Inhalation: Move outdoors, breathe fresh air, seek medical help for persistent symptoms
Skin Contact: Remove contaminated clothing, wash thoroughly with water and soap, avoid scrubbing to prevent further irritation
Eye Contact: Flush eyes with water for at least 15 minutes, look for medical assessment if discomfort remains
Ingestion: Rinse mouth, never induce vomiting except on professional medical advice, immediate medical attention improves outcome
Flammability: Not notably flammable but can burn at high temperatures and produce irritating or toxic gases, especially oxides of carbon
Extinguishing Media: Use dry chemical, foam, or carbon dioxide; water may help cool but might spread contamination
Protective Actions: Self-contained breathing apparatus and full protective gear should be standard for response teams
Spill Cleanup: Sweep up solid product using non-sparking tools, avoid raising dust, ventilate area
Personal Protection: Gloves, eye protection, mask recommended, especially in confined or poorly ventilated spots
Disposal: Seal waste in dedicated chemical containers, never pour or sweep material into drains or onto bare ground
Handling: Wear proper protective equipment, minimize exposure, and wash hands thoroughly after use
Safe Storage: Store in a dry, cool, well-ventilated area, separate from oxidizing agents, acids, or sources of ignition
Best Practices: Containers should be clearly labeled and sealed tightly when not in use, spill kits and eye wash stations belong close by
Ventilation: Work with good exhaust systems, local workspace ventilation or fume hoods lower exposure risks
Personal Protective Equipment: Safety glasses, chemical-resistant gloves, lab coats or chemical aprons
Work Culture: Routine health monitoring for frequent handlers ensures health stays uncompromised
Physical State: Solid at room temperature
Melting Point: Typically around 54–56°C
Boiling Point: Approximately 163–165°C
Solubility: Dimethyl oxalate dissolves readily in alcohols, ethers, and is slightly soluble in water
Odor: Faint ester-like
Density: Close to 1.1 g/cm³, making it manageable for bulk handling
Stability: Stable under ordinary conditions of storage and handling
Reactivity: Can react with strong oxidizers, acids, or bases, producing hazardous byproducts
Decomposition: High heat decomposes into methanol, carbon monoxide, and carbon dioxide, which all present dangers to people and indoor air quality
Acute Effects: Inhalation or accidental ingestion can cause respiratory or gastrointestinal upset, headache, dizziness
Chronic Effects: No proven evidence for cancer risk, but long-term exposure burdens liver, kidney, or skin health
Sensitivity: People with allergies or asthma may notice reactions at lower exposure levels than others
Aquatic Toxicity: Can be harmful to aquatic life in large quantities, so accidental discharges threaten waterways
Degradation: Breaks down gradually in the environment but can persist in low-oxygen soil or water
Bioaccumulation: Unlikely to bioaccumulate significantly, which limits long-term ecosystem buildup
Waste Disposal: Collect material in sealed, labeled containers intended for hazardous chemical disposal
Avoid: Regular trash, wastewater drains, or open burning
Professional Services: Work with permitted hazardous waste companies experienced in chemical destruction or recovery
Regulatory Status: Not typically regulated as a hazardous material for ground, air, or sea transport in small quantities, but always check packaging and documentation requirements
Packing Group: Delivered in sealed containers designed to limit leaks and prevent exposure
Handling in Transit: Temperature and humidity control recommended for bulk shipments to guard against product degradation
Chemical Inventories: Registered in most global chemical inventories such as REACH, TSCA, and DSL
Workplace Guidelines: Occupational exposure limits for dimethyl oxalate are not as common, but general exposure limit principles for organic esters should apply
Environmental Regulation: Any spills or releases fall under hazardous substance reporting for most major jurisdictions, and adherence to waste handling laws supports community safety
