UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1548: Aniline hydrochloride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1548 is assigned the proper shipping name Aniline hydrochloride 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

Aniline hydrochloride appears as a white to greenish colored crystalline solid. Toxic by ingestion and a skin and eye irritant. May emit toxic aniline and chloride fumes under exposure to high temperatures or flame. Used to make dyes and printing ink.

CAS Number: 142-04-1
Molecular Formula: C6H8ClN
Molecular Weight: 129.59 g/mol
Boiling Point: 473 F
Melting Point: 388 °F (NTP, 1992)
Flash Point: 380 F
Specific Gravity: 1.2215 (sinks in water)
Vapor Density: 4.46 (heavier than air)
Water Solubility: less than 1 mg/mL at 64 F

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 1548 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.