Diethyl sulfate

Diethyl sulfate is an organosulfur compound with the molecular formula C4H10O4S and CAS number 64-67-5. This chemical substance has a molecular weight of 154.19 g/mol and belongs to the sulfate ester family. It is classified as a highly hazardous chemical with significant carcinogenic and mutagenic properties, requiring strict handling protocols and safety measures in industrial applications.

Diethyl sulfate is typically a colorless to pale yellow liquid at room temperature with an oily consistency. The compound has a characteristic sweet, ethereal odor and is soluble in organic solvents such as ethanol and diethyl ether. It has limited solubility in water but can undergo hydrolysis reactions. The substance is volatile and can decompose under certain conditions, releasing toxic vapors.

Diethyl sulfate is primarily used as an ethylating agent in organic synthesis and pharmaceutical manufacturing. It serves as a reagent for introducing ethyl groups into various organic compounds, particularly in the production of pharmaceuticals, agrochemicals, and specialty chemicals. Due to its highly toxic and carcinogenic nature, its industrial applications are strictly regulated and limited to specialized chemical processes requiring professional handling.

Diethyl sulfate requires extreme caution during handling due to its carcinogenic and mutagenic properties. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and respiratory protection. Work must be conducted in well-ventilated areas or under fume hoods. Direct skin and eye contact must be avoided at all costs, and proper training is mandatory before handling this substance in any industrial setting.

Diethyl sulfate must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Storage areas should be secure and accessible only to trained personnel. The substance should be kept away from strong bases, oxidizing agents, and moisture to prevent decomposition. Temperature-controlled storage is recommended to maintain stability and prevent vapor formation.

Immediate action is critical following diethyl sulfate exposure due to its corrosive and toxic nature. For skin contact, remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. In case of eye contact, rinse immediately with water for 15-20 minutes. Seek immediate medical attention for any exposure, and inform medical personnel about the specific chemical involved.

Diethyl sulfate disposal requires adherence to strict hazardous waste regulations due to its classification as carcinogenic and mutagenic. The substance must be disposed of through licensed hazardous waste contractors and cannot be discharged into sewers or the environment. Proper labeling, documentation, and chain-of-custody procedures are mandatory. Incineration at approved high-temperature facilities is typically the preferred disposal method.

Diethyl sulfate is classified under ADR transport regulations as Class 6.1 (toxic substances), Packing Group II, indicating high toxicity. Transportation requires proper dangerous goods packaging, labeling, and documentation. Vehicles must display appropriate hazard placards, and drivers need dangerous goods training certification. Shipments must comply with international transport regulations and be accompanied by safety data sheets and emergency response information.

Diethyl sulfate is subject to extensive regulatory controls under REACH, CLP, and national chemical safety legislation. Its classification as Carcinogenic 1B and Mutagenic 1B triggers strict occupational exposure limits and handling requirements. Users must comply with registration, evaluation, and authorization procedures. The substance may require specific permits for use and is subject to workplace monitoring and health surveillance requirements.

Diethyl sulfate is available through specialized chemical distributors in Europe, including OYSI, which supplies high-quality chemicals to industrial customers. Due to its hazardous classification and regulatory restrictions, purchase typically requires verification of legitimate industrial use, appropriate handling capabilities, and compliance documentation. Buyers must demonstrate proper safety infrastructure and trained personnel before suppliers can authorize delivery of this controlled substance.