UN/NA Number Reference
DOT Class 3 Flammable Liquid placard

UN 2284: Isobutyronitrile

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2284 is assigned the proper shipping name Isobutyronitrile in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 3 Flammable Liquid material, Packing Group II. Required label(s): 3, 6.1.

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

Isobutyronitrile appears as a clear colorless liquid. Flash point 47 °F. Less dense than water. Vapors heavier than air. Toxic oxides of nitrogen produced during combustion.

CAS Number: 78-82-0
Molecular Formula: C4H7N
Molecular Weight: 69.11 g/mol
Color / Form: Colorless liquid
Odor: Almond-like odor
Boiling Point: 219 F
Melting Point: -96.7 °F (EPA, 1998)
Flash Point: 47 F
Autoignition: 900 °F (482 °C)
Specific Gravity: 0.733 to 0.7608
Vapor Pressure: 100 mmHg at 130 F
Vapor Density: 2.38 (heavier than air)
Water Solubility: Slight
Log P: log Kow = 0.46

Regulatory Data

EPCRA TPQ (40 CFR 355)
1000 lb
OSHA PEL
none
NIOSH REL
TWA 8 ppm (22 mg/m 3 )
IDLH
N

Special Provisions

49 CFR 172.102 special provision codes for this entry: IB2, T7, TP2, TP13. 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 2284 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.