UN/NA Number Reference
DOT Class 2.3 Toxic Gas placard

UN 1069: Nitrosyl chloride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1069 is assigned the proper shipping name Nitrosyl chloride in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 2.3 Toxic Gas material. Required label(s): 2.3, 8.

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 125)

Hazards: TOXIC. Corrosive. Causes burns. May be fatal if inhaled. Vapors heavier than air.

Fire: Use water spray or fog. Do not get water inside containers.

Spill: Fully encapsulating suit required. Stop leak if safe. Use water spray.

Chemical and Physical Properties

Nitrosyl chloride appears as a yellow to yellowish red gas. Liquefies at -5.5 °C. Very toxic by inhalation. Noncombustible, but accelerates burning of combustible material. Decomposed by water to form corrosive hydrochloric acid. Vapors heavier than air. Prolonged exposure to fire or heat can cause containers to rupture violently and rocket.

CAS Number: 2696-92-6
Molecular Formula: ClNO
Molecular Weight: 65.46 g/mol
Color / Form: YELLOW GAS OR YELLOW-RED LIQUID OR CRYSTALS
Odor: CHOKING ODOR
Boiling Point: 21.6 F
Melting Point: -74 °F (USCG, 1999)
Autoignition: Not flammable (USCG, 1999)
Specific Gravity: 1.36 (sinks in water)
Vapor Pressure: 2410.0 [mmHg]
Vapor Density: 2.3 (heavier than air)
Water Solubility: SOL IN FUMING SULFURIC ACID

Special Provisions

49 CFR 172.102 special provision codes for this entry: 3, B14. 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 1069 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.