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methacrylic acid 79-41-4 MSDS
Name: Methacrylic acid 99.5% (stabilized with ca 250 ppm MEHQ) Material Safety Data Sheet
Synonym: 2-Methylpropenoic acid; 2-Methyl-2-propenoic acid
CAS: 79-41-4
Section 1 - Chemical Product   MSDS Name:Methacrylic acid 99.5% (stabilized with ca 250 ppm MEHQ) Material Safety Data Sheet
Synonym:2-Methylpropenoic acid; 2-Methyl-2-propenoic acid

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
79-41-4 Methacrylic acid 99.5 201-204-4
Hazard Symbols: C
Risk Phrases: 21/22 35

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Harmful in contact with skin and if swallowed. Causes severe burns.
Potential Health Effects
Eye:
Causes eye burns.
Skin:
Harmful if absorbed through the skin. Causes skin burns.
Ingestion:
May cause burns to the digestive tract. May be harmful if swallowed.
Inhalation:
Causes chemical burns to the respiratory tract.
Chronic:
No information found.

Section 4 - FIRST AID MEASURES
  Eyes: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical aid immediately.
Skin:
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Get medical aid immediately. Wash clothing before reuse.
Ingestion:
If swallowed, do NOT induce vomiting. Get medical aid immediately.
If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
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. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. Combustible liquid and vapor.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or alcohol-resistant 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. Remove all sources of ignition.
Provide ventilation.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. 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 ingest or inhale.
Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation. Keep away from heat and flame. Pure vapor will be uninhibited and may polymerize in vents or other confined spaces.
Storage:
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store at around 20C. Do NOT freeze.

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# 79-41-4: United Kingdom, WEL - TWA: 20 ppm TWA; 72 mg/m3 TWA United Kingdom, WEL - STEL: 40 ppm STEL; 143 mg/m3 STEL Belgium - TWA: 20 ppm VLE; 71 mg/m3 VLE France - VME: 20 ppm VME; 70 mg/m3 VME Malaysia: 20 ppm TWA; 70 mg/m3 TWA Netherlands: 20 ppm MAC; 70 mg/m3 MAC Russia: 10 mg/m3 TWA Spain: 20 ppm VLA-ED; 72 mg/m3 VLA-ED CAS# 150-76-5: Belgium - TWA: 5 mg/m3 VLE France - VME: 5 mg/m3 VME Germany: 5 mg/m3 TWA Malaysia: 5 mg/m3 TWA Netherlands: 5 mg/m3 MAC Spain: 5 mg/m3 VLA-ED Personal Protective Equipment Eyes: Wear chemical splash goggles.
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 above room te
Color: colorless
Odor: repulsive
pH: Not available.
Vapor Pressure: .975 mm Hg @ 25 deg C
Viscosity: 1.4 mPas 20 deg C
Boiling Point: 163 deg C @ 760 mm Hg
Freezing/Melting Point: 16 deg C
Autoignition Temperature: 365 deg C ( 689.00 deg F)
Flash Point: 76 deg C ( 168.80 deg F)
Explosion Limits, lower: 1.60 vol %
Explosion Limits, upper: 8.80 vol %
Decomposition Temperature:
Solubility in water: Soluble.
Specific Gravity/Density: 1.0100 g/cm3
Molecular Formula: C4H6O2
Molecular Weight: 86.09

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable only if stored and handled under recommended conditions. The stability of the product depends upon the availability of both dissolved oxygen and MEHQ inhibitor(CAS=150-76-5). The presence of oxygen is necessary for the MEHQ to function effectively. The product should never be stored under an inert gas atmosphere, but should always be stored under an atmosphere containing 5-21% oxygen by volume.
Conditions to Avoid:
Ignition sources, excess heat, do not freeze, loss of inhibitor.
Incompatibilities with Other Materials:
Strong oxidizing agents, hydrochloric acid Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: May occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 79-41-4: OZ2975000 CAS# 150-76-5: SL7700000 LD50/LC50:
CAS# 79-41-4: Dermal, guinea pig: LD50 = 1 gm/kg; Oral, mouse: LD50 = 1250 mg/kg; Oral, rabbit: LD50 = 1200 mg/kg; Oral, rat: LD50 = 1060 mg/kg; Skin, rabbit: LD50 = 500 mg/kg.
CAS# 150-76-5: Draize test, rabbit, skin: 6 gm/12D (Intermittent) Mild; Draize test, rabbit, skin: 10%; Oral, rat: LD50 = 1600 mg/kg.
Carcinogenicity:
Methacrylic acid - Not listed by ACGIH, IARC, or NTP.
Hydroquinone methyl ether - 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: METHACRYLIC ACID, INHIBITED
Hazard Class: 8
UN Number: 2531
Packing Group: II
IMO
Shipping Name: METHACRYLIC ACID, INHIBITED
Hazard Class: 8
UN Number: 2531
Packing Group: II
RID/ADR
Shipping Name: METHACRYLIC ACID, INHIBITED
Hazard Class: 8
UN Number: 2531
Packing group: III

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: C
Risk Phrases:
R 21/22 Harmful in contact with skin and if
swallowed.
R 35 Causes severe burns.
Safety Phrases:
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
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# 79-41-4: 1
CAS# 150-76-5: 1
Canada
CAS# 79-41-4 is listed on Canada's DSL List.
CAS# 150-76-5 is listed on Canada's DSL List.
CAS# 79-41-4 is listed on Canada's Ingredient Disclosure List.
CAS# 150-76-5 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 79-41-4 is listed on the TSCA inventory.
CAS# 150-76-5 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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