UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1838: Titanium tetrachloride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1838 is assigned the proper shipping name Titanium tetrachloride 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 II. Required label(s): 6.1, 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 137)

Hazards: Produce flammable gases on contact with water. May ignite on contact with water. Some react violently with water.

Fire: DO NOT use water or foam. Use dry chemical, dry sand, or soda ash.

Spill: Do not touch. Keep material dry. Move containers from water. Dike to prevent water contact.

Chemical and Physical Properties

Titanium tetrachloride appears as a colorless fuming liquid with a pungent odor. Corrosive to metals and tissue. Very toxic by inhalation.

CAS Number: 7550-45-0
Molecular Formula: Cl4Ti
Molecular Weight: 189.7 g/mol
Color / Form: Colorless liquid
Odor: Penetrating acid odor
Boiling Point: 277.5 F
Melting Point: -11.4 °F (EPA, 1998)
Specific Gravity: 1.726 - Denser than water
Vapor Pressure: 10 mmHg at 70.34 F
Vapor Density: 6.5 (heavier than air)
Water Solubility: Sol in cold water, alcohol

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1000 lb
EPCRA TPQ (40 CFR 355)
100 lb

A release of this material at or above its CERCLA reportable quantity (1000 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: 2, B7, B9, B14, B32, B77, T20, TP2, TP13, TP38, TP45. 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 1838 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.