CAS · 75-11-6
Product Overview
Diiodomethane is a high-purity biochemical-reagents supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Property | Specification |
|---|---|
| Appearance | Light yellow to yellow liquid or solid |
| Purity (GC, area) | 99% min |
| Water (KF) | 0.1% max |
| Identification by GC | The retention time of the main peak consistent with the reference standard |
Applications
1. Determination of Mineral and Material Density (Heavy Liquid Testing)
One of the most prominent uses of Diiodomethane丨CAS 75-11-6 is in density separation of minerals and materials.
Due to its exceptionally high density, it is used as a heavy liquid to:
Separate minerals by float-sink analysis in geology.
Evaluate the purity and identity of gemstones, polymers, and ceramics.
By adjusting its density (e.g., with other halogenated liquids), it helps identify unknown solids based on buoyancy behavior.
2. Optical Applications
Used as a high refractive index fluid in optical experiments and lens testing.
In gemology and optical microscopy, diiodomethane allows visualization of internal features of materials and crystals by reducing light scattering.
3. Organic Synthesis and Chemical Reactions
Diiodomethane is a valuable reagent and intermediate in organic synthesis.
It is used to:
Prepare cyclopropanes via the Simmons–Smith reaction when combined with zinc-copper couple.
Synthesize various iodinated organic compounds, contributing to medicinal chemistry and radiolabeling research.
As a source of iodomethyl (CH₂I) groups, it is utilized in cross-coupling and carbene transfer reactions.
4. Materials Science and Polymer Testing
Employed in surface energy analysis of polymers and coatings.
Helps measure the contact angle and wetting behavior to assess adhesion and surface compatibility.
Its defined polar and dispersive components make it ideal for Owens-Wendt surface energy calculations.
5. Academic and Research Uses
Diiodomethane is frequently used in laboratory settings for:
Demonstrations of fluid density and optical principles.
Investigating refractive behavior under various wavelengths.
Educational chemistry labs focused on organoiodine chemistry.
Benefits
1. High Density and Refractive Index
Enables non-destructive analysis of solids based on physical behavior in liquid.
Valuable in optical calibration, refractometry, and microscopic imaging due to its similarity to the refractive index of glass and crystals.
2. Versatility in Organic Reactions
Participates in a variety of synthetic transformations, especially involving:
Halogenation
Carbene chemistry
Cyclopropanation reactions
3. Analytical Utility
Provides a simple yet effective method for estimating material properties like:
Surface energy
Mineral density
Wettability
4. Minimal Use Requirements
Only small volumes are needed for density separation or refractive testing, reducing overall chemical waste in controlled lab conditions.
Conclusion
Diiodomethane丨CAS 75-11-6 is a densely packed, optically active, and chemically reactive compound that plays a critical role in material testing, synthetic organic chemistry, and optical research. While it requires cautious handling due to its toxicity and light sensitivity, its unique properties make it indispensable in geological analysis, chemical synthesis, and physical measurements.
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