Methacrylonitrile 126-98-7 MSDS
Name: Methacrylonitrile 99% (stabilized with 50 ppm MEHQ) Material Safety Data Sheet
Synonym: 2-Methyl-2-propenenitrile
CAS: 126-98-7
Section 1 - Chemical Product   MSDS Name:Methacrylonitrile 99% (stabilized with 50 ppm MEHQ) Material Safety Data Sheet
Synonym:2-Methyl-2-propenenitrile

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
126-98-7 Methacrylonitrile 99 204-817-5
Hazard Symbols: T F N
Risk Phrases: 11 23/24/25 43 51/53

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable. Toxic by inhalation, in contact with skin and if swallowed. May cause sensitization by skin contact. Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Potential Health Effects
Eye:
Causes eye irritation. Lachrymator (substance which increases the flow of tears).
Skin:
Causes skin irritation. Harmful if absorbed through the skin. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Substance is readily absorbed through the skin.
Ingestion:
Harmful if swallowed. May cause irritation of the digestive tract.
Inhalation:
Harmful if inhaled. Causes respiratory tract irritation. May be fatal if exposed to high concentrations. Vapors may cause dizziness or suffocation.
Chronic:
No information found.

Section 4 - FIRST AID MEASURES
  Eyes: 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. Wash clothing before reuse.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. Severe acute inhalations should be treated like cyanide poisoning.
Notes to Physician:
Antidote: Always have a cyanide antidote kit on hand when working with cyanide compounds. Get medical advice to use.

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. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. Use water spray to keep fire-exposed containers cool. Extremely flammable liquid and vapor. Containers may explode in the heat of a fire.
Flammable liquid and vapor. Will be easily ignited by heat, sparks or flame.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.

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. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Use a spark-proof tool. A vapor suppressing foam may be used to reduce vapors.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing.
Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep away from heat, sparks and flame. Do not breathe vapor or mist. Use only with adequate ventilation or respiratory protection.
Storage:
Keep away from sources of ignition. Refrigerator/flammables. Keep containers tightly closed.

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 exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Exposure Limits CAS# 126-98-7: United Kingdom, WEL - TWA: 1 ppm TWA; 2.8 mg/m3 TWA United Kingdom, WEL - STEL: 3 ppm STEL; 8.4 mg/m3 STEL Belgium - TWA: 1 ppm VLE; 2.7 mg/m3 VLE France - VME: 1 ppm VME; 3 mg/m3 VME Malaysia: 1 ppm TWA; 27 mg/m3 TWA Netherlands: 1 ppm MAC; 3 mg/m3 MAC Spain: 1 ppm VLA-ED; 2.7 mg/m3 VLA-ED Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
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: clear, colorless to pale yellow
Odor: bitter-almond
pH: Not available.
Vapor Pressure: 64.4 mbar @ 20
Viscosity: 0.39 MPA 20.00 deg
Boiling Point: 90 - 92 deg C @ 760 mm Hg
Freezing/Melting Point: -35.8 deg C
Autoignition Temperature: Not available.
Flash Point: 12 deg C ( 53.60 deg F)
Explosion Limits, lower: 2.00 vol %
Explosion Limits, upper: 6.80 vol %
Decomposition Temperature:
Solubility in water: Insoluble.
Specific Gravity/Density: .8000g/cm3
Molecular Formula: C4H5N
Molecular Weight: 67.09

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures. When heated to decompostion cyanide fumes are released.
Conditions to Avoid:
Ignition sources, excess heat, confined spaces.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong reducing agents, strong acids, strong bases, chlorates, nitrates.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, carbon dioxide, cyanides.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 126-98-7: UD1400000 LD50/LC50:
CAS# 126-98-7: Draize test, rabbit, eye: 50 mg; Draize test, rabbit, eye: 500 mg/24H Mild; Draize test, rabbit, skin: 200 mg Mild; Draize test, rabbit, skin: 500 mg/24H Mild; Inhalation, mouse: LC50 = 36 ppm/4H; Inhalation, rabbit: LC50 = 37 ppm/4H; Inhalation, rat: LC50 = 328 ppm/4H; Oral, mouse: LD50 = 17 mg/kg; Oral, rabbit: LD50 = 16 mg/kg; Oral, rat: LD50 = 120 mg/kg; Skin, rabbit: LD50 = 12500 ug/kg; Skin, rat: LD50 = 2080 mg/kg.
Carcinogenicity:
Methacrylonitrile - Not listed by ACGIH, IARC, or NTP.
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: METHACRYLONITRILE, STABILIZED
Hazard Class: 3 (6.1)
UN Number: 3079
Packing Group: I
IMO
Shipping Name: METHACRYLONITRILE, STABILIZED
Hazard Class: 3 (6.1)
UN Number: 3079
Packing Group: I
RID/ADR
Shipping Name: METHACRYLONITRILE, STABILIZED
Hazard Class: 3
UN Number: 3079
Packing group: I
USA RQ: CAS# 126-98-7: 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 N
Risk Phrases:
R 11 Highly flammable.
R 23/24/25 Toxic by inhalation, in contact with skin
and if swallowed.
R 43 May cause sensitization by skin contact.
R 51/53 Toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 18 Handle and open container with care.
S 29 Do not empty into drains.
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# 126-98-7: 2
Canada
CAS# 126-98-7 is listed on Canada's NDSL List.
CAS# 126-98-7 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 126-98-7 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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