MSDS --Methyl Iodide--- Iodomethane
Methyl Iodide---
Iodomethane--------Synonyms:
Iodomethane
CAS No.:
74-88-4 -------Molecular Weight: 142 ------Chemical Formula: CH3I
-------Product Codes: 2692
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------- ---------
Methyl Iodide 74-88-4 97 - 100% Yes
Emergency Overview
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DANGER! MAY BE FATAL IF
SWALLOWED, INHALED OR ABSORBED THROUGH SKIN. AFFECTS CENTRAL NERVOUS SYSTEM.
CAUSES IRRITATION TO SKIN, EYES AND RESPIRATORY TRACT.
J.T. Baker SAF-T-DATA(tm)
Ratings (Provided here for your convenience)
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Health Rating: 3 -
Severe (Cancer
Causing)
Flammability Rating: 0 - None
Reactivity Rating: 1 - Slight
Contact Rating: 3 - Severe (Life)
Lab Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON; VENT HOOD; PROPER
GLOVES
Storage Color Code: Blue (Health)
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Potential Health Effects
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Inhalation:
Inhalation of vapors can irritate the respiratory tract. Overexposure may
produce symptoms of vertigo, delirium and mental disturbances. Other symptoms
may include slurred speech, drowsiness, coughing, nausea and vomiting. Higher
exposures can cause a build up of fluid in the lungs which can cause death.
Ingestion:
Ingestion may damage the gastro-intestinal tract.
Severe intoxication can occur with symptoms of central nervous system
depression. Coma, convulsions, and death may follow.
Skin Contact:
Causes irritation, rash and blister formation. Prolonged contact can cause skin
burns. Can be absorbed through skin with toxic
effects.
Eye Contact:
Vapors can cause irritation. Splashes may cause severe irritation with eye
damage.
Chronic Exposure:
Prolonged or repeated exposure to smaller doses
cause primarily central nervous system effects. Symptoms may include slurred
speech, blurred vision, Parkinsonian rigidity and memory defects. Has been shown
to cause cancer in animals and may be linked to cancer in humans.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders or eye
problems, or impaired respiratory function may be more susceptible to the
effects of the substance.
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If breathing
is difficult, give oxygen. Get medical attention immediately.
Ingestion:
Induce vomiting immediately as directed by medical personnel. Never give
anything by mouth to an unconscious person. Get medical attention immediately.
Skin Contact:
Immediately flush skin with plenty of soap and water for at least 15 minutes
while removing contaminated clothing and shoes. Get medical attention,
immediately. Wash clothing before reuse. Thoroughly clean shoes before reuse.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting
lower and upper eyelids occasionally. Get medical attention immediately.
Fire:
Not considered to be a fire hazard. Fire may produce poisonous or irritating
gases. --Explosion: Not considered to be an explosion hazard.
Fire Extinguishing Media: Dry chemical, foam, carbon dioxide, or water
spray. ---Special Information: In the event of a fire, wear full
protective clothing and NIOSH-approved self-contained breathing apparatus with
full facepiece operated in the pressure demand or other positive pressure mode.
Ventilate area of leak or spill. Wear appropriate personal protective equipment as specified in Section 8. Isolate hazard area. Keep unnecessary and unprotected personnel from entering. Contain and recover liquid when possible. Collect liquid in an appropriate container or absorb with an inert material (e. g., vermiculite, dry sand, earth), and place in a chemical waste container. Do not use combustible materials, such as saw dust. Do not flush to sewer! US Regulations (CERCLA) require reporting spills and releases to soil, water and air in excess of reportable quantities. The toll free number for the US Coast Guard National Response Center is (800) 424-8802.
Keep in a tightly closed light-resistant container, stored in a cool, dry, ventilated area. Protect against physical damage. Wear special protective equipment (Sec. 8) for maintenance break-in or where exposures may exceed established exposure levels. Wash hands, face, forearms and neck when exiting restricted areas. Shower, dispose of outer clothing, change to clean garments at the end of the day. Avoid cross-contamination of street clothes. Wash hands before eating and do not eat, drink, or smoke in workplace. Containers of this material may be hazardous when empty since they retain product residues (vapors, liquid); observe all warnings and precautions listed for the product.
Airborne Exposure
Limits:
-OSHA Permissible Exposure Limit (PEL): 5 ppm (TWA) skin. -ACGIH Threshold Limit
Value (TLV): 2 ppm (TWA) skin.
Ventilation System:
A system of local and/or general exhaust is recommended to keep employee
exposures below the Airborne Exposure Limits. Local exhaust ventilation is
generally preferred because it can control the emissions of the contaminant at
its source, preventing dispersion of it into the general work area. Please refer
to the ACGIH document, Industrial Ventilation, A Manual of Recommended
Practices, most recent edition, for details.
Personal Respirators (NIOSH Approved):
If the exposure limit is exceeded, wear a supplied air, full-facepiece
respirator, airlined hood, or full-facepiece self-contained breathing apparatus.
Skin Protection:
Wear impervious protective clothing, including boots, gloves, lab coat, apron or
coveralls, as appropriate, to prevent skin contact.
Eye Protection:
Use chemical safety goggles and/or a full face shield where splashing is
possible. Maintain eye wash fountain and quick-drench facilities in work area.
Appearance:
Clear, colorless liquid. ---Odor: Acrid odor. ---Solubility:
14 g/100 g water @ 20C (68F) --Specific Gravity: 2.28 @ 20C/4 C 00
pH: No information found. ---% Volatiles by volume @ 21C (70F):
100
Boiling Point: ---42C (108F) ---Melting Point: -66.1C (-87F) ---Vapor
Density (Air=1): 4.9 ---Vapor Pressure (mm Hg): 400 @ 25C (77F)
Evaporation Rate (BuAc=1): No information found.
Stability:
Stable at room temperature in sealed containers. Turns yellow, red, or brown on
exposure to light, due to decomposition and liberation of free iodine.
Decomposes at 270C (518F)
Hazardous Decomposition Products: Burning may produce toxic iodine
vapors. ---Hazardous Polymerization: This substance does not polymerize.
Incompatibilities: Strong oxidizers, powdered metals, reducing agents. --
Conditions to Avoid: No information found.
Toxicological Data:
Oral rat LD50:76 mg/kg. Inhalation rat LC50: 1300 mg/m3/4H Investigated as a
tumorigen and mutagen.
Carcinogenicity:
NIOSH considers this substance to be a potential
occupational carcinogen.
Environmental Fate:
When released into the soil, this material is expected to quickly evaporate.
When released into the water, this material is expected to have a half-life of
greater than 30 days. This material has an estimated bioconcentration factor (BCF)
of less than 100. When released into the air, this material may be moderately
degraded by photolysis.
Environmental Toxicity:
No information found.