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3-methylthiopropanal 3268-49-3 MSDS
Name: 3-(Methylthio)propionaldehyde 95% (GC) Material Safety Data Sheet
Synonym: Methional; Beta-(Methylmercapto)propionaldehyde; 3-(Methylmercapto)propionaldehyde; Methylmercaptopropionic Aldehyde
CAS: 3268-49-3
Section 1 - Chemical Product   MSDS Name:3-(Methylthio)propionaldehyde 95% (GC) Material Safety Data Sheet
Synonym:Methional; Beta-(Methylmercapto)propionaldehyde; 3-(Methylmercapto)propionaldehyde; Methylmercaptopropionic Aldehyde

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
3268-49-3 4-Thiapentanal 95 221-882-5
Hazard Symbols: XN
Risk Phrases: 36/37/38 20

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Irritating to eyes, respiratory system and skin. Harmful by inhalation.Stench.
Potential Health Effects
Eye:
Causes eye irritation. May cause chemical conjunctivitis and corneal damage.
Skin:
Causes skin irritation. May cause cyanosis of the extremities.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Mercaptans may cause nausea and headache. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis (bluish discoloration of skin due to deficient oxygenation of the blood), cold extremities and rapid pulse. May be harmful if swallowed.
Inhalation:
Causes respiratory tract irritation. Aspiration may lead to pulmonary edema. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis (bluish discoloration of skin due to deficient oxygenation of the blood), cold extremities and rapid pulse. Mercaptans may cause nausea and headache. Can produce delayed pulmonary edema. Inhalation at high concentrations may cause CNS depression and asphixiation.
Chronic:
Effects may be delayed.

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.
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:
Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
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.
Notes to Physician:
Treat symptomatically and supportively.

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. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Combustible liquid.
Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. Containers may explode when heated.
Extinguishing Media:
In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.

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. Provide ventilation.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep refrigerated. (Store below 4C/39F.) Storage under a nitrogen blanket has been recommended.

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 ventilation to keep airborne concentrations low.
Exposure Limits CAS# 3268-49-3: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
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: faint yellow - colorless
Odor: stench
pH: Not available.
Vapor Pressure: 760 mm Hg @ 165C
Viscosity: Not available.
Boiling Point: 165-166 deg C @ 11.00mmHg
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: 61 deg C ( 141.80 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density: 1.0520g/cm3
Molecular Formula: C4H8OS
Molecular Weight: 104.17

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable at room temperature in closed containers under normal storage and handling conditions.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat, strong oxidants.
Incompatibilities with Other Materials:
Strong bases, strong oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 3268-49-3: UE2285000 LD50/LC50:
CAS# 3268-49-3: Draize test, rabbit, eye: 0.01 mL Moderate; Draize test, rabbit, skin: 500 uL/24H Severe; Draize test, rabbit, skin: 0.5 mL/4H Moderate; Inhalation, mouse: LC50 = 5400 mg/m3/2H; Inhalation, mouse: LC50 = 5400 mg/m3/2H; Inhalation, rat: LC50 = 5820 mg/m3/4H; Inhalation, rat: LC50 = 5820 mg/m3/4H; Oral, mouse: LD50 = 1620 mg/kg; Oral, mouse: LD50 = 1620 mg/kg; Oral, rat: LD50 = 700 mg/kg; Oral, rat: LD50 = 4400 mg/kg; Oral, rat: LD50 = 1.52 mg/kg; Skin, rabbit: LD50 = 747 ug/kg/24H.
Carcinogenicity:
4-Thiapentanal - 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: 4-THIAPENTANAL
Hazard Class: 6.1
UN Number: 2785
Packing Group: III
IMO
Shipping Name: 4-THIAPENTANAL
Hazard Class: 6.1
UN Number: 2785
Packing Group: III
RID/ADR
Shipping Name: 4-THIAPENTANAL
Hazard Class: 6.1
UN Number: 2785
Packing group: III

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 20 Harmful by inhalation.
R 36/37/38 Irritating to eyes, respiratory system
and skin.
Safety Phrases:
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 37/39 Wear suitable gloves and eye/face
protection.
WGK (Water Danger/Protection)
CAS# 3268-49-3: 3
Canada
CAS# 3268-49-3 is listed on Canada's DSL List.
CAS# 3268-49-3 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 3268-49-3 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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