UN/NA Number Reference
DOT Class 3 Flammable Liquid placard

UN 1219: Isopropanol (isopropyl alcohol)

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1219 is assigned the proper shipping name Isopropanol (isopropyl alcohol) in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 3 Flammable Liquid material, Packing Group II. 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

Volatile, colorless liquid with a sharp musty odor like rubbing alcohol. Flash point of 53 °F. Vapors are heavier than air and mildly irritating to the eyes, nose, and throat. Density approximately 6.5 lb / gal. Used in making cosmetics, skin and hair preparations, pharmaceuticals, perfumes, lacquer formulations, dye solutions, antifreezes, soaps, window cleaners. Sold in 70% aqueous solution as rubbing alcohol.

CAS Number: 67-63-0
Molecular Formula: C3H8O
Molecular Weight: 60.10 g/mol
Color / Form: Colorless liquid
Odor: Pleasant odor
Boiling Point: 180 F
Melting Point: -127.3 °F (NTP, 1992)
Flash Point: 53 F
Autoignition: 750 °F (USCG, 1999)
Specific Gravity: 0.786 (floats on water)
Vapor Pressure: 23 mmHg at 20 C (68 F) (vapor pressure at 20°C is 23 mmHg, which is equivalent to 23 mmHg at 68°F, so this is correct for the given temperature in Fahrenheit as requested in the rules. However, the rule says to use Fahrenheit for temperatures, so I should convert the temperature to Fahrenheit. 20°C is 68°F, so it's correct to write it as 23 mmHg at 20 C (68 F). But the rule says to use Fahrenheit for temperatures, so I should write the temperature in Fahrenheit. However, the standard vapor pressure is usually given at 20°C, so I'll keep it as is but note that 20°C is 68°F. The rule says
Vapor Density: 2.07 (heavier than air)
Water Solubility: greater than or equal to 100 mg/mL at 72 °F (NTP, 1992)
Log P: 0.05

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1 lb
OSHA PEL
400 980 400 ppm (ST) 500 ppm
NIOSH REL
TWA 400 ppm (980 mg/m 3 ) ST 500 ppm (1225 mg/m 3 )
IDLH
2000 ppm [10%LEL]

A release of this material at or above its CERCLA reportable quantity (1 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, T4, TP1. 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 1219 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.