UN/NA Number Reference

UN 3104: Organic peroxide type C, solid

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 3104 is assigned the proper shipping name Organic peroxide type C, solid in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 5.2 Organic Peroxide material. Required label(s): 5.2.

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 146)

Hazards: Extremely sensitive to heat, friction, shock. May detonate. May burn vigorously.

Fire: Flood with water from maximum distance. Evacuate if fire reaches cargo.

Spill: DO NOT touch. Keep cool. Do not rub or create friction.

Chemical and Physical Properties

Molecular Weight: Variable g/mol

Boiling Point: Variable

Flash Point: Variable

Specific Gravity: Variable

Water Solubility: Variable

Need the full interactive record? Open UN 3104 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.