UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1812: Potassium fluoride, solid

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1812 is assigned the proper shipping name Potassium fluoride, solid 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 154)

Hazards: TOXIC. Corrosive. Non-combustible but may decompose producing toxic fumes when heated.

Fire: Use agent appropriate for surrounding fire. Cool containers.

Spill: Do not touch. Avoid inhalation. Use water spray to reduce fumes.

Chemical and Physical Properties

Potassium fluoride appears as white powder or crystals with a sharp saline taste. Shipped as a solid or an aqueous solution. Strongly irritates skin, eyes and mucous membranes. Toxic by ingestion. Used in insecticides, solder flux and etching glass.

CAS Number: 7789-23-3
Molecular Formula: FK
Molecular Weight: 58.0967 g/mol
Color / Form: White cubic crystals
Boiling Point: 2741 F
Melting Point: 1576 °F (NTP, 1992)
Specific Gravity: 2.48
Vapor Pressure: 100 pa
Water Solubility: greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)

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 1812 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.