UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 2876: Resorcinol

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2876 is assigned the proper shipping name Resorcinol 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 III. Required label(s): 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 153)

Hazards: TOXIC. Combustible. Corrosive. Causes burns. Toxic fumes when heated.

Fire: Small: dry chemical, CO2, water spray. Large: water spray, foam.

Spill: Do not touch. Stop leak if safe. Use water spray to reduce vapor.

Chemical and Physical Properties

Resorcinol is a very white crystalline solid that becomes pink on exposure to light if not completely pure. Burns although ignition is difficult. Density approximately 1.28 g / cm3. Irritating to skin and eyes. Toxic by skin absorption. Used to make plastics and pharmaceuticals.

CAS Number: 108-46-3
Molecular Formula: C6H6O2
Molecular Weight: 110.11 g/mol
Color / Form: White needle-like crystals
Odor: Faint, characteristic odor
Boiling Point: 531 to 536 F
Melting Point: 228 to 232 °F (NTP, 1992)
Flash Point: 261 F
Autoignition: 1125 °F (USCG, 1999)
Specific Gravity: 1.2 (sinks in water)
Vapor Pressure: 1 mmHg at 227.1 F
Vapor Density: 3.79 (heavier than air)
Water Solubility: greater than or equal to 100 mg/mL at 65.3 F
Log P: log Kow = 0.80

Regulatory Data

CERCLA RQ (40 CFR 302.4)
5000 lb
OSHA PEL
none
NIOSH REL
TWA 10 ppm (45 mg/m 3 ) ST 20 ppm (90 mg/m 3 )
IDLH
N
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: IB8, IP3, T1, TP33. 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 2876 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.