Acrolein

  • Acraldehyde
  • Propenaldehyde
  • 2-Propenal
  • 2-Propen-1-one
  • Acrylaldehyde
Formula
CH2=CHCHO
Structure
Description
A colorless to yellow volatile liquid with a disagreeable choking odor.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
107-02-8
EC (EINECS/ELINCS)
203-453-4
EC Index Number
605-008-00-3
EC Class
Highly flammable; Very toxic; Toxic; Corrosive; Dangerous for the Environment
RTECS
AS1050000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
1092
Merck
12,130
Beilstein/Gmelin
741856
Beilstein Reference
4-01-00-03435
RCRA
P003
EPA OPP
701
Swiss Giftliste 1
G-1047
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H4O
Formula mass
56.06
Melting point, °C
-87.8
Boiling point, °C
52.7
Vapor pressure, mmHg
210 (20 C)
Vapor density (air=1)
1.94
Odor Threshold Odor threshold 0.21 ppm
Critical temperature
254
Critical pressure
50.0
Density
0.843 g/cm3 (20 C)
Solubility in water
213 g/L
Viscosity
0.35 cp @ 20C
Surface tension
24 g/s2
Refractive index
1.4022 (20 C)
Partition coefficient, pKow
-0.01
Heat of vaporization
28.3 kJ/mol
Heat of combustion
-1634 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Keep under a nitrogen blanket. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables. Store protected from light and air.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Store protected from light. Store protected from air. Use and store under nitrogen. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors.
Stability
Decomposes when in contact with air, light, or organic matter. Unstable.
Incompatibilities
Polymerizes violently upon exposure to strong acids or bases, oxidants (such as air), light or heat. Also incompatible with amines, sulfur dioxide and metal salts.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
-26
Autoignition, °C
234
Upper exp. limit, %
31
Lower exp. limit, %
2.8
Fire fighting
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. Extremely flammable liquid. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Water may be ineffective. Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. Do NOT use straight streams of water. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Very flammable. Combustion imminent very flammable. May travel considerable distance to a source of ignition and flash back. At elevated temperatures, polymerization may take place. If this occurs in a container, it may violently rupture.
Hazards
Under fire conditions, polymerization may occur. If inside a container, violent rupture of the container may take place. When heated to decomposition, it emits highly toxic fumes. Alkalis or strong acids act as catalysts, causing a condensation reaction and liberating energy. Reaction may be very rapid and violent. Readily converted by oxygen to hazardous peroxides and acids. Unstable, avoid exposure to alkalis, strong acids, oxygen, elevated temperatures, such as fire conditions. (Polymerization inside container could cause violent rupture of container under fire conditions.)
Combustion products
Toxic gases and vapors (such as carbon monoxide and peroxides) may be released in a fire involving acrolein.
Health
4
 
Flammability
3
 
 
Reactivity
3
 

Health.
Exposure limit(s)
OSHA PEL: TWA 0.1 ppm (0.25 mg/m3) NIOSH REL: TWA 0.1 ppm (0.25 mg/m3) ST 0.3 ppm (0.8 mg/m3) See Appendix C (Aldehydes) NIOSH IDLH: 2 ppm
Poison_Class
1
Exposure effects
Short-term exposure may cause increases in heart rate and blood pressure. Serious poisoning may cause CNS depression. Birth defects were produced by direct intra-amniotic injection in rats, but the offspring of rabbits treated by gavage did not have developmental toxicity.
   Ingestion
May be fatal if swallowed. May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May cause severe irritation and possible burns. May be harmful if absorbed through the skin.
   Eyes
May result in corneal injury. Contact with eyes may cause severe irritation, and possible eye burns. Lachrymator.

First aid
 
   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
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1092
Response guide
Hazard class
6.1
PRTC
T
Packing Group
I
 
USCG CHRIS Code
ARL
 
Std. Transport #
4927007