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iodomethane
CAS No.: 74-88-4
Synonyms:
Formula: CH3I
Exact Mass: 141.92800
Molecular Weight: 141.93900
PSA: 0.00000
LogP: 1.05120
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iodomethane 74-88-4 MSDS
Name: Iodomethane 2M solution in tert-butyl methyl ether Material Safety Data Sheet
Synonym: Methyl iodid
CAS: 74-88-4
Section 1 - Chemical Product   MSDS Name:Iodomethane 2M solution in tert-butyl methyl ether Material Safety Data Sheet
Synonym:Methyl iodid

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
74-88-4 Methyl iodide 200-819-5
Hazard Symbols: T F
Risk Phrases: 11 21 23/25 37/38 40

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable. Harmful in contact with skin. Toxic by inhalation and if swallowed. Irritating to respiratory system and skin. Limited evidence of a carcinogenic effect.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
Causes skin irritation. Harmful if absorbed through the skin.
Ingestion:
May cause irritation of the digestive tract. Toxic if swallowed.
Inhalation:
Causes respiratory tract irritation. Toxic if inhaled.
Chronic:
Limited evidence of a carcinogenic effect.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Get medical aid immediately. Wash mouth out with water.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Flammable liquid and vapor.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Wear a self contained breathing apparatus and appropriate personal protection. (See Exposure Controls, Personal Protection section). Remove all sources of ignition. Use a spark-proof tool.

Section 7 - HANDLING and STORAGE
  Handling:
Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use and store under nitrogen. Use only in a chemical fume hood.
Storage:
Store in a tightly closed container. Store in a dry area.
Refrigerator/flammables. Store protected from light. Store under nitrogen.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local explosion-proof ventilation to keep airborne levels to acceptable levels.
Exposure Limits CAS# 74-88-4: United Kingdom, WEL - TWA: 2 ppm TWA; 12 mg/m3 TWA United Kingdom, WEL - STEL: 6 ppm STEL; 36 mg/m3 STEL United States OSHA: 5 ppm TWA; 28 mg/m3 TWA Belgium - TWA: 2 ppm VLE; 12 mg/m3 VLE France - VME: 2 ppm VME; 12 mg/m3 VME Germany: 0.3 ppm TWA; 2 mg/m3 TWA Germany: Skin absorber Malaysia: 2 ppm TWA; 12 mg/m3 TWA Netherlands: 2 ppm MAC; 10 mg/m3 MAC Spain: 2 ppm VLA-ED; 12 mg/m3 VLA-ED CAS# 1634-04-4: United Kingdom, WEL - TWA: 25 ppm TWA; 92 mg/m3 TWA United Kingdom, WEL - STEL: 75 ppm STEL; 275 mg/m3 STEL Belgium - TWA: 40 ppm VLE; 146 mg/m3 VLE Germany: 50 ppm TWA; 180 mg/m3 TWA Malaysia: 40 ppm TWA; 144 mg/m3 TWA Netherlands: 100 ppm STEL; 360 mg/m3 STEL Netherlands: 50 ppm MAC; 180 mg/m3 MAC Russia: 100 mg/m3 TWA Spain: 40 ppm VLA-ED; 147 mg/m3 VLA-ED Personal Protective Equipment Eyes: Not available.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: Not available.
Odor: Not available.
pH: Not available.
Vapor Pressure: 251mmHg @20 deg C
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 41 - 43 deg C
Autoignition Temperature: Not available.
Flash Point: -28 deg C ( -18.40 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: CH3I
Molecular Weight: 141.94

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Light sensitive.
Conditions to Avoid:
High temperatures, incompatible materials, light, ignition sources, exposure to moist air or water.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong bases, strong alkalies, alkali metals, oxygen, mercury, water, sodium.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, hydrogen iodide, iodine.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 74-88-4: PA9450000 CAS# 1634-04-4: KN5250000 LD50/LC50:
CAS# 74-88-4: Dermal, guinea pig: LD50 = 800 mg/kg; Draize test, rabbit, eye: 100 mg Severe; Draize test, rabbit, skin: 500 mg Severe; Inhalation, mouse: LC50 = 5 gm/m3/57M-C; Inhalation, mouse: LC50 = 5000 mg/m3/57M; Inhalation, rat: LC50 = 1300 mg/m3/4H; Oral, rat: LD50 = 76 mg/kg.
CAS# 1634-04-4: Inhalation, mouse: LC50 = 141 gm/m3/15M; Inhalation, mouse: LC50 = 28000 mg/m3/2H; Inhalation, rat: LC50 = 23576 ppm/4H; Inhalation, rat: LC50 = 41000 mg/m3/4H; Oral, mouse: LD50 = 5960 uL/kg; Oral, rat: LD50 = 4 gm/kg.
Carcinogenicity:
Methyl iodide - California: carcinogen, initial date 4/1/88 Methyl tert-butyl ether - ACGIH: A3 - Confirmed animal carcinogen with unknown relevance to Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.*
Hazard Class: 6.1 (3)
UN Number: 2929
Packing Group: I
IMO
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.
Hazard Class: 6.1 (3)
UN Number: 2929
Packing Group: I
RID/ADR
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.
Hazard Class: 6.1 (3)
UN Number: 2929
Packing group: I
USA RQ: CAS# 74-88-4: 100 lb final RQ; 45.4 kg final RQ
USA RQ: CAS# 1634-04-4: 1000 lb final RQ; 454 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T F
Risk Phrases:
R 11 Highly flammable.
R 21 Harmful in contact with skin.
R 23/25 Toxic by inhalation and if swallowed.
R 37/38 Irritating to respiratory system and skin.
R 40 Limited evidence of a carcinogenic effect.
Safety Phrases:
S 16 Keep away from sources of ignition - No
smoking.
S 36/37 Wear suitable protective clothing and
gloves.
S 38 In case of insufficient ventilation, wear
suitable respiratory equipment.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 74-88-4: 2
CAS# 1634-04-4: 1
Canada
CAS# 74-88-4 is listed on Canada's DSL List.
CAS# 1634-04-4 is listed on Canada's DSL List.
CAS# 74-88-4 is listed on Canada's Ingredient Disclosure List.
CAS# 1634-04-4 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 74-88-4 is listed on the TSCA inventory.
CAS# 1634-04-4 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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