UN/NA Number Reference
DOT Class 3 Flammable Liquid placard

UN 1131: Carbon disulfide

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1131 is assigned the proper shipping name Carbon disulfide in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 3 Flammable Liquid material, Packing Group I. Required label(s): 3, 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 131)

Hazards: HIGHLY FLAMMABLE. TOXIC. May be fatal if inhaled, swallowed, or absorbed through skin. Vapors heavier than air.

Fire: Small: dry chemical, CO2, water spray, alcohol-resistant foam. Large: water spray, fog, alcohol-resistant foam.

Spill: Eliminate ignition sources. Do not touch. Stop leak if safe. Use vapor-suppressing foam. Ventilate area.

Chemical and Physical Properties

Carbon disulfide appears as a clear colorless to light yellow volatile liquid with a strong disagreeable odor. Flammable over a wide vapor/air concentration range (1%-50%). Vapors are readily ignited; the heat of a common light bulb may suffice. Insoluble in water and more dense than water. Hence sinks in water. Vapors are heavier than air. Used in the manufacture of rayon and cellophane, in the manufacture of flotation agents and as a solvent.

CAS Number: 75-15-0
Molecular Formula: CS2
Molecular Weight: 76.15 g/mol
Color / Form: Mobile ... liquid
Odor: Purest distillates have sweet, pleasing, and ethereal odor ... usual commercial and reagent grades are foul smelling
Boiling Point: 116 F
Melting Point: -167 °F (EPA, 1998)
Flash Point: -22 F
Autoignition: 194 °F (ICSC, 2024)
Specific Gravity: 1.2632 (sinks in water)
Vapor Pressure: 360 mmHg at 77 F
Vapor Density: 2.67 (heavier than air)
Water Solubility: less than 1 mg/mL at 68 F
Log P: log Kow = 1.94

Regulatory Data

CERCLA RQ (40 CFR 302.4)
100 lb
EPCRA TPQ (40 CFR 355)
10000 lb
OSHA PEL
See Annotated Z-2 See Annotated Z-2 CARBON DISULFIDE - ACGIH
NIOSH REL
TWA 1 ppm (3 mg/m 3 ) ST 10 ppm (30 mg/m 3 ) [skin]
IDLH
500 ppm
RCRA Waste Code(s)
[object Object]

A release of this material at or above its CERCLA reportable quantity (100 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: B16, T14, TP2, TP7, TP13, W31. 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 1131 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.