2,4‐Dinitrobenzenesulfonylhydrazide

[53777-75-6] C6H6N4O6S (MW 262.23) InChI = 1S/C6H6N4O6S/c7-8-17(15,16)6-2-1-4(9(11)12)3-5(6)10(13)14/h1-3,8H,7H2 InChIKey = OEIFSMDIUWGNCS-UHFFFAOYSA-N (an effective reagent for preparing propargyl ketones and aldehydes via the Eschenmoser fragmentation2) Alternate Name: DNSH. Physical Data: mp 120 °C. Solubility: sol most organic solvents. Analysis of Reagent Purity: IR, NMR. Preparative Method: by treatment of 2,4-dinitrobenzenesulfonyl chloride with 95% hydrazine in THF and crystallized from EtOH/THF.1 Handling, Storage, and Precautions: thermally labile; should be stored in a freezer. It is a toxic and potentially flammable solid that should be handled with gloves under inert atmosphere and freshly prepared as needed.