Diiodomethane

• CAT Number: R045599
• CAS Number: 75-11-6
• Molecular Formula: CH2I2
• Molecular Weight: 267.84
• Purity: ≥95%
• Synonyms: Methylene Diiodide; Methylene Iodide; NSC 35804
• Storage: Store at RT
• IUPAC Name: diiodomethane
• InChI: InChI=1S/CH2I2/c2-1-3/h1H2
• InChIKey: NZZFYRREKKOMAT-UHFFFAOYSA-N
• SMILES: C(I)I

Diiodomethane (CAT: R045599) is a dense, colorless to pale yellow liquid halomethane, consisting of a central methylene group bonded to two iodine atoms. Known for its high refractive index and relatively high density, it is commonly used in refractive index matching, density gradient separation, and optical microscopy. In organic synthesis, diiodomethane serves as a reagent in cyclopropanation reactions (e.g., Simmons–Smith reaction) and in the preparation of various organoiodine compounds. Due to its light sensitivity and potential toxicity, it should be handled under controlled conditions.