Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Information
- CAS Number: 37830-90-3
- Molecular Formula: C?H?O?
- Molecular Weight: 116.12 g/mol
- Synonyms: 4,5-Dimethyl-1,3-dioxolan-2-one; Dimethyl ethylene carbonate; 4,5-Dimethyl-1,3-dioxolane-2-one;
- Classification: Fine chemical raw material, pharmaceutical intermediate, organic synthetic reagent, electrolyte additive, plasticizer intermediate
- EINECS Number: 253-680-6
- MDL Number: MFCD00005383
- Beilstein/Reaxys Number: 1072157
- TSCA Status: Not Listed
- Customs Code: 2932999090
- Hazard Code: Xi
- Risk Phrases: R36/37/38
- Safety Phrases: S26; S36
- UN Number: 3271
- Hazard Class: 3
- Packing Class: III
Physical & Chemical Properties
- Appearance: Colorless to pale yellow transparent liquid; slightly aromatic odor; stable under proper storage conditions, no obvious decomposition or discoloration.
- Melting Point: -45°C to -43°C; exists as liquid at room temperature, solidifies only at low temperatures, no decomposition during solidification.
- Boiling Point: 182-184°C (760 mmHg); distills without obvious decomposition under normal pressure; boiling range is narrow, with good thermal stability during distillation.
- Solubility: Soluble in water (miscible in any proportion at 25°C); easily soluble in methanol, ethanol, acetone, ether, chloroform, dimethyl sulfoxide and other common organic solvents; slightly soluble in aliphatic hydrocarbons; solubility in water remains stable within 0-50°C.
- Stability: Stable under ambient temperature and pressure; incompatible with strong acids, strong bases and strong oxidizing agents; avoid excessive heat, direct sunlight and moisture; prone to hydrolysis under acidic or alkaline conditions, generating corresponding diols and carbon dioxide; does not polymerize under normal storage conditions.
- Key Parameters: Density 1.085±0.005 g/cm3 (25°C); Refractive Index 1.420-1.424 (20°C); LogP -0.32; Purity ≥99.0% (GC); Water Content ≤0.1%; Acid Value ≤0.1 mg KOH/g; Viscosity 2.8 mPa·s (25°C); Flash Point 78°C (closed cup).
Uses
4,5-Dimethyl-1,3-dioxol-2-one is a versatile organic synthetic intermediate and fine chemical raw material, widely used in pharmaceutical, chemical, electronic and material fields. In organic synthesis, it is an important cyclic carbonate reagent, used for the synthesis of various pharmaceutical intermediates, such as heterocyclic compounds, amino acids and esters; it can also be used as a methylating agent and acylating agent in organic reactions, participating in nucleophilic substitution and addition reactions. In the electronic field, it is used as an additive for lithium-ion battery electrolytes, which can improve the cycle performance and high-temperature stability of batteries, reduce the hydrolysis of electrolytes and improve the safety of batteries. In the material field, it is used as an intermediate for plasticizers and polymer monomers, used in the synthesis of polycarbonates, polyurethanes and other polymers, improving the flexibility and processing performance of materials. Additionally, it is used as a solvent for organic reactions and a extractant for fine chemicals, and can be customized according to research and production needs for the synthesis of related derivatives.
Packaging & Storage
Packaging: Laboratory grade: 100mL, 500mL amber glass bottles with Teflon-lined caps to prevent moisture absorption and light exposure; industrial grade: 20L HDPE barrels, 200L galvanized steel barrels with inner PE liners, labeled with "Keep Away from Heat", "Avoid Acids and Bases" and GHS hazard information (GHS07, H315, H319, H335), as well as hazard codes, risk phrases and safety phrases. Storage: Laboratory grade: Store in a cool, dry, ventilated environment at 0-10°C; industrial grade: Store in a cool, dry, ventilated warehouse at room temperature below 30°C, relative humidity ≤70%; keep tightly closed to prevent moisture absorption, air contamination and volatilization; separate from strong acids, bases and oxidizing agents; avoid mixing with toxic and harmful substances; shelf life 18 months under recommended conditions. Transportation: Avoid transportation under high temperature, strong light and rain; prevent collision and leakage; do not transport together with incompatible substances; laboratory grade should be transported with ice packs in summer to avoid high temperature volatilization. Handling: Operate with gloves, goggles, and anti-chemical protective clothing; use in ventilated areas to avoid inhalation of vapor and contact with skin/eyes; wash skin thoroughly with soap and water after contact; if splashed into eyes, rinse with flowing water for 10-15 minutes and seek medical help; if there is a leakage, collect with clean tools and properly dispose of waste; do not ingest; store away from heat sources and open flames.
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