Product Description

Wintersun code: 01-028
CAS Number: 1341-49-7
Molecular Formula: NH4HF2
Molecular Weight: 57.04


The pH of a 5% aqueous solution of Ammonium Bifluoride is 3.5. In aqueous solution it releases 0.35 pounds of hydrofluoric acid per pound of Ammonium Bifluoride. In strong acid solutions, Ammonium Bifluoride releases 0.70 pounds of hydrofluoric acid per pound. Since the product absorbs heat when aqueous solutions are prepared, it is often advisable to use warm water. Additional properties are listed below.

Melting Point: 258 ºF (126 ºC)
Boiling Point: 462 ºF (239 ºC)
Specific Gravity: 1.5
Solubility in Water (25ºC): 41.5% by weight


Glass frosting, Sugar Industry as a bactericide, Cleaning and Etching, Wood preservative, Stain Removing, Breweries and Distilleries, Uranium separation, Metal pickling, Acidising oil, Aluminum Anodizing.

Sales Specification

Content(NH4HF2): 98.0% min
(NH4)2SiF6: 2.0% max
Loss on drying: 1.0% max
Residue on ignition: 0.2% max
Sulfate (based on SO4): 0.1% max


In 50 LB Bag, 44 bags per pallet


Proper Shipping Name: Ammonium Bifluoride, Solid
UN No.: 1727
Hazard Class: 8
Packing Group: II