UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1199: Furaldehydes

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1199 is assigned the proper shipping name Furaldehydes 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 II. 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 132)

Hazards: HIGHLY FLAMMABLE. CORROSIVE. Causes burns. Vapors may form explosive mixture with air.

Fire: Alcohol-resistant foam, dry chemical, CO2. Do not use water jet. Cool containers.

Spill: Eliminate ignition sources. Do not touch. Stop leak if safe. Use foam.

Chemical and Physical Properties

Furfural appears as colorless or reddish-brown mobile liquids with a penetrating odor. Flash points 140 °F. Denser than water and soluble in water. Vapors heavier than air. May be toxic by ingestion, skin absorption or inhalation.

CAS Number: 98-01-1
Molecular Formula: C5H4O2
Molecular Weight: 96.08 g/mol
Color / Form: Colorless, oily liquid ... Turns yellow to brown on exposure to air and light and resinifies
Odor: Peculiar odor, somewhat resembling the odor of benzaldehyde
Boiling Point: 323.1 F
Melting Point: -33.7 °F (NTP, 1992)
Flash Point: 140 F
Autoignition: 739 °F (USCG, 1999)
Specific Gravity: 1.159 (sinks in water)
Vapor Pressure: 1 mmHg at 68 F
Vapor Density: 3.31 (heavier than air)
Water Solubility: 50 to 100 mg/mL at 64 F
Log P: log Kow= 0.41

Regulatory Data

CERCLA RQ (40 CFR 302.4)
5000 lb
OSHA PEL
TWA 5 ppm (20 mg/m 3 ) [skin]
NIOSH REL
See Appendix D
IDLH
100 ppm
RCRA Waste Code(s)
[object Object]

A release of this material at or above its CERCLA reportable quantity (5000 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: IB2, T7, 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 1199 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.