NAME: Methyl Iodide
SYNONYM(s): Iodomethane
IMIS: 1772
CAS: 74-88-4
NIOSH: RTECS PA9450000; 47908
DOT: UN2644 Poison
DESCRIPTION:
Colorless liquid which turns yellow, red, or brown on exposure to light and moisture.
MW: 142
BP: 108 F
VP: 375 mm
MP: -87 F
INCOM: Strong oxidizers
Exposure Limits
OSHA GENERAL INDUSTRY PEL: 5 ppm, 28 mg/m3 (Skin)
OSHA CONSTRUCTION INDUSTRY PEL: 5 ppm, 28 mg/m3 TWA (Skin)
ACGIH TLV: 2 ppm, 12 mg/m3 TWA (Skin)
NIOSH REL: 2 ppm TWA (Skin), Potential Carcinogen
Health Factors
IARC: Group 3, not classifiable as to its carcinogenicity to humans
SYMPTOM(s): Nausea, vomiting; vertigo; ataxia; slurred speech; drowsiness; dermatitis; eye irritation; (carcinogenic)
HEALTH EFFECTS: Acute and cumulative CNS effects (HE4) and (HE3) Mutagen (HE2)
ORGAN: CNS, skin, eyes
Monitoring
PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):
MEDIA: Charcoal Tube (100/50 mg sections, 20/40 mesh)
ANL SOLVENT: Toluene
MAX V: 50 Liters MAX F: 1.0 L/min
ANL 1: Gas Chromatography; GC/FID
REF: 1 (NIOSH 1014)
SAE: 0.12
CLASS: Fully Validated
SECONDARY SAMPLING/ANALYTICAL METHOD (SAM2):
DEVICE: Instrumentation COMPANY: Infrared Spectrophotometer
PART #: MIRAN 1A & 1B RANGE: 1.8 ppm @ 3.4 um
CLASS: Mfg
DEVICE: Detector Tube COMPANY: Kitagawa
PART #: 176S RANGE: 5-40 ppm
CLASS: Mfg
WIPE:
Wipe with charcoal pad, seal in glass vial for shipment.
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