Chlorosulfonyl isocyanate is a highly reactive, extremely toxic, and highly corrosive colorless liquid that strongly irritates the respiratory tract and skin. It reacts violently with water and serves as an important intermediate in organic synthesis, used in the preparation of pharmaceuticals, pesticides, and dyes. It is commonly used to introduce sulfonyl or isocyanate groups and is a cornerstone in the synthesis of various functional organic compounds.
| Chemical Name | Chlorosulfonyl cyanate |
| Chemical Formula | ClSO2NCO |
| CAS Number | 1189-71-5 |
| Appearance | Colorless liquid |
| Melting Point | -44 °C |
| Boiling Point | 107 °C |
| Density (±20), g/cm³ | 1.626 g/cm³ |
| Molecular weight | 141.53 |
| Solubility | Insoluble in water |
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