UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1092: Acrolein, stabilized

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1092 is assigned the proper shipping name Acrolein, stabilized in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 6.1 Toxic Substance material, Packing Group I. Required label(s): 6.1, 3.

Packing group indicates the degree of danger within a hazard class: PG I is high danger, PG II medium, PG III low. The proper shipping name, hazard class, UN number, and packing group together form the basic shipping description that must appear on shipping papers and, where required, on the package and placard.

Emergency Response (ERG Guide 131)

Hazards: HIGHLY FLAMMABLE. TOXIC. May be fatal if inhaled, swallowed, or absorbed through skin. Vapors heavier than air.

Fire: Small: dry chemical, CO2, water spray, alcohol-resistant foam. Large: water spray, fog, alcohol-resistant foam.

Spill: Eliminate ignition sources. Do not touch. Stop leak if safe. Use vapor-suppressing foam. Ventilate area.

Chemical and Physical Properties

Acrolein, stabilized appears as a colorless to yellow volatile liquid with a disagreeable choking odor. Flash point below 0 °F. Initially irritating to the eyes and mucous membranes. Very toxic by inhalation. Less dense than water (7.0 lb / gal). Vapors heavier than air. Used to make other chemicals, plastics, and as a herbicide. Rate of onset: Immediate Persistence: Minutes to hour Odor threshold: 1 ppm Source/use/other hazard: Herbicide; tox and corrosive fumes.

CAS Number: 107-02-8
Molecular Formula: C3H4O
Molecular Weight: 56.06 g/mol
Color / Form: Colorless or yellowish liquid
Odor: Extremely sharp; extremely acrid, pungent, burnt sweet; hot fat
Boiling Point: 126 °F
Melting Point: -126 °F (EPA, 1998)
Flash Point: -15 °F
Autoignition: 453 °F (USCG, 1999)
Specific Gravity: 0.8389 (floats on water)
Vapor Pressure: 135.71 to 210 mmHg at 50 to 68 °F
Vapor Density: 1.94 (heavier than air)
Water Solubility: Miscible (fully soluble)
Log P: log Kow = -0.01
pH: pH 6.0 (max), a 10% solution in water at 25 °C

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1 lb
EPCRA TPQ (40 CFR 355)
500 lb
OSHA PEL
TWA 0.1 ppm (0.25 mg/m 3 )
NIOSH REL
TWA 0.1 ppm (0.25 mg/m 3 ) ST 0.3 ppm (0.8 mg/m 3 )
IDLH
2 ppm
RCRA Waste Code(s)
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A release of this material at or above its CERCLA reportable quantity (1 lb) requires immediate notification to the National Response Center at 800-424-8802.

Special Provisions

49 CFR 172.102 special provision codes for this entry: 1, 380, 387, B9, B14, B30, B42, B77, T22, TP2, TP7, TP13, TP38, TP44. These codes modify the general requirements (packaging, quantity limits, exceptions) for this specific material. Look up each code in 49 CFR 172.102 for the full text.

Need the full interactive record? Open UN 1092 in the SpillNerd lookup tool for the live database entry with placard graphics, GHS pictograms, full segregation tables, and synonym search. For another material, use the UN number and chemical lookup.

Reference data compiled from the DOT Hazardous Materials Table (49 CFR 172.101), the 2024 Emergency Response Guidebook, and public chemical databases (PubChem, NIOSH, EPA). Always verify the correct shipping description against the current regulation and the manufacturer's SDS Section 14 before shipping.