Molecular Formula | C7H5NO5S2 |
Molar Mass | 247.25 |
Physical and Chemical Properties | This product is a colorless oily liquid, decomposes in water and air, and is soluble in solvents such as acetonitrile and xylene. |
Risk Codes | R2 - Risk of explosion by shock, friction, fire or other sources of ignition R14 - Reacts violently with water R42/43 - May cause sensitization by inhalation and skin contact. R48/22 - Harmful danger of serious damage to health by prolonged exposure if swallowed. |
Safety Description | S22 - Do not breathe dust. S30 - Never add water to this product. S35 - This material and its container must be disposed of in a safe way. S36/37 - Wear suitable protective clothing and gloves. |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Use | 2-methoxycarbonylthiophene-3-sulfonyl isocyanate is an intermediate of the sulfonylurea herbicide thiensulfuron. |
production method | its preparation method is to add xylene, 3-chlorosulfonylthiophene -2-carboxylate and n-butyl isocyanate xylene solution into the reaction kettle, heat up and reflux for 15 min, reheat to 130 ℃, pass phosgene for about 6-8 h, and control the amount of sulfonamide to a certain amount by gas chromatography, stop the light gas, and heat out of isocyanate n-butyl ester, xylene, the residual liquid is the finished product. |