Iodomethane CAS 74-88-4 Information
| CAS |
74-88-4 |
| Molecular formula |
CH3I |
| Molecular weight |
141.94 |
| EIENCS |
200-819-5 |
| Form |
Liquid |
| Melting point |
−64(lit.) |
| boling point |
41-43 °C |
| Density |
2.28 g/mL at 25 °C(lit.) |
| Solubility |
water: soluble14g/L at 20°C |
| PKA |
/ |
| Color |
Clear |
| Storage temp |
|
What is Iodomethane CAS 74-88-4?
Chemical name: Methyl iodide (Alternative name: Methyl iodine)
Molecular formula: CH₃I
Molecular weight: 141.94 g/mol
CAS Number: 74-88-4
Appearance: Colorless and transparent liquid (decomposes to brown/purple upon exposure to light)
Solubility: Slightly soluble in water (1.4g /100mL, 20℃), miscible with ethanol and ether
Iodomethane CAS 74-88-4 Use
Methylation reagent (Main use)
Pharmaceutical synthesis: Production of iodomethylmethionine (vitamin U), analgesics, and antidotes.
Pesticide intermediates: Synthetic fungicides and herbicides (replacing methyl bromide).
industrial field
Soil disinfection: After the Montreal Convention banned methyl bromide, it has become an environmentally friendly alternative.
Microscopic examination: High refractive index characteristics are used for optical imaging.
Emerging technology
Fire extinguishing agent components: Efficiently block the combustion chain reaction.
Electronic cleaning agent: Removing organic residues in semiconductor manufacturing.
Iodomethane CAS 74-88-4 safety
Health risk:
Highly toxic: Oral LD₅₀=100-200 mg/kg in rats, inhalation causes pulmonary edema and central nervous system injury.
Carcinogenicity: Classified as a Group 3 carcinogen by IARC (insufficient evidence but caution is needed).
Protective measures:
Operation: Wear a gas mask and corrosion-resistant gloves, and work in a fume hood.
Leakage treatment: Sand and soil adsorption (water flushing is prohibited), and waste liquid should be disposed of as hazardous chemicals.
Storage requirements:
Seal the brown bottle, keep it in a cool and well-ventilated place (≤25℃), and keep it away from oxidants/alkalis.
