UN/NA Number Reference
DOT Class 3 Flammable Liquid placard

UN 2265: N,N-Dimethylformamide

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2265 is assigned the proper shipping name N,N-Dimethylformamide in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 3 Flammable Liquid material, Packing Group III. Required label(s): 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 129)

Hazards: Flammable. Irritating vapor. May cause dizziness. Toxic if inhaled or absorbed through skin.

Fire: Alcohol-resistant foam, dry chemical, CO2, water spray.

Spill: Eliminate ignition sources. Ventilate area. Absorb with earth or sand.

Chemical and Physical Properties

N,n-dimethylformamide appears as a water-white liquid with a faint fishy odor. Flash point 136 °F. Slightly less dense than water. Vapors heavier than air. Toxic by inhalation or skin absorption. May irritate eyes.

CAS Number: 68-12-2
Molecular Formula: C3H7NO
Molecular Weight: 73.09 g/mol
Color / Form: Colorless to very slightly yellow liquid
Odor: Fishy odor
Boiling Point: 300 to 313 F
Melting Point: -78 °F (NTP, 1992)
Flash Point: 153 F
Autoignition: 833 °F (USCG, 1999)
Specific Gravity: 0.95 (floats on water)
Vapor Pressure: 3.7 mmHg at 77 F
Vapor Density: 2.51 (heavier than air)
Water Solubility: greater than or equal to 100 mg/mL at 72 F
Log P: -1.01
pH: pH = 6.7 (0.5 molar solution in water)

Regulatory Data

CERCLA RQ (40 CFR 302.4)
100 lb
OSHA PEL
TWA 10 ppm (30 mg/m 3 ) [skin]
NIOSH REL
TWA 10 ppm (30 mg/m 3 ) [skin]
IDLH
500 ppm

A release of this material at or above its CERCLA reportable quantity (100 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: B1, IB3, T2, TP2. 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 2265 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.