Iodomethane (stabilized with Copper chip) , >99.5%(GC) , 74-88-4
Synonym(s):
Iodomethane;Methyl Iodide
CAS NO.：74-88-4
Empirical Formula: CH3I
Molecular Weight: 141.94
MDL number: MFCD00001073
EINECS: 200-819-5
PRODUCT Properties
| Melting point: | −64(lit.) |
| Boiling point: | 41-43 °C |
| Density | 2.28 g/mL at 25 °C(lit.) |
| vapor density | 4.89 (vs air) |
| vapor pressure | 24.09 psi ( 55 °C) |
| refractive index | n |
| Flash point: | −18 °F |
| storage temp. | 2-8°C |
| solubility | water: soluble14g/L at 20°C |
| form | Liquid |
| Specific Gravity | 2.280 |
| color | Clear |
| Odor | Sweet, ethereal odor |
| PH | 5.2 (H2O, 25℃) |
| explosive limit | 8.5-66% (v/v) |
| Water Solubility | 14 g/L (20 ºC) |
| Sensitive | Light Sensitive |
| Merck | 14,6087 |
| BRN | 969135 |
| Henry's Law Constant | 5.06 at 21 °C (Gan and Yates, 1996) |
| Exposure limits | TLV-TWA 2 ppm (～11 mg/m3) (ACGIH),
5 ppm (MSHA and OSHA); carcinogenicity:
Animal Limited Evidence (IARC), Suspected
Human Carcinogen. |
| Dielectric constant | 7.0（20℃） |
| Stability: | Light Sensitive |
| LogP | 1.510 |
| CAS DataBase Reference | 74-88-4(CAS DataBase Reference) |
| IARC | 3 (Vol. 41, Sup 7, 71) 1999 |
| NIST Chemistry Reference | Methyl iodide(74-88-4) |
| EPA Substance Registry System | Methyl iodide (74-88-4) |
Description and Uses
Methyl iodide is a colorless liquid with a pungent, ether-like odor. Turns yellow, red, or brown on exposureto light and moisture. Molecular weight = 141.94; Specificgravity (H2O:1) 5 2.28; Boiling point = 42.8℃; Vaporpressure 5 400 mmHg; Freezing/Melting point 5 2 66.7℃.It is noncombustible. Hazard Identification (based on NFPA704 M Rating System): Health 2, Flammability 1, Reactivity0. Slightly soluble in water; solubility 5 1%.
Methyl iodide is used in the analysis of pyridine; microscopy; as an embedding materialfor examining diatoms (Merck 1996); and asa methylating agent.
Safety
| Symbol(GHS) |     GHS02,GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H226-H301+H331-H312-H315-H319-H335-H351-H410 |
| Precautionary statements | P210-P273-P280-P301+P310-P303+P361+P353-P304+P340+P311 |
| Hazard Codes | T,F,Xn |
| Risk Statements | 21-23/25-37/38-40-11-39/23/24/25-23/24/25-38-20/22 |
| Safety Statements | 36/37-38-45-9-24-16-7-60-36/37/39-33-23-20-4 |
| RIDADR | UN 2644 6.1/PG 1 |
| OEB | B |
| OEL | TWA: 2 ppm (10 mg/m3) [skin] |
| WGK Germany | 1 |
| RTECS | PA9450000 |
| F | 8 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | I |
| HS Code | 29033990 |
| Hazardous Substances Data | 74-88-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 76 mg/kg; LD50 s.c. in mice: 0.78 mmoles/kg (IARC, 1986) |
| IDLA | 100 ppm |
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) |
| Excepted Quantities | Forbidden |
