Outage Notification: This website will undergo a planned maintenance outage on Saturday, June 5, from 12:30-2:30 p.m. EDT (6:30-8:30 p.m. UDT). We regret any inconvenience this may cause.

Buffered Oxide Etchants

Ammonium Fluoride Etching Mixture (19408)

AF 91-9 Puranal (Oxide Etch 10/1)

Physical Properties

  • Physical Form
    • Liquid
  • pH
    • Acidic
  • Flashpoint
    • Not applicable
  • Odor
    • Stinging
  • Melting Point/Range
    • No data available
  • Color
    • Colorless
  • Boiling Point/Range
    • 100 °C (1,013 hPa)

Safety Information

  • Incompatible Materials
    • Glass and silicate-containing materials are attacked, Contact with strong acids liberates hydrogen fluoride, Corrosive in contact with metal
  • Ignition Temperature
    • Not applicable
  • Chemical Stability
    • Stable under normal conditions.
  • Corrosivity
    • Corrosive to metals

International Transportation

  • Packing Group
    • II
  • Chemical Class
    • 8
  • UN Number
    • 3264
  • Harmonized System Code
    • 38249996

Physical Properties

  • Physical Form
    • Liquid
  • pH
    • Acidic
  • Flashpoint
    • Not applicable
  • Odor
    • Stinging
  • Melting Point/Range
    • No data available
  • Color
    • Colorless
  • Boiling Point/Range
    • 100 °C (1,013 hPa)

Safety Information

  • Incompatible Materials
    • Glass and silicate-containing materials are attacked, Contact with strong acids liberates hydrogen fluoride, Corrosive in contact with metal
  • Ignition Temperature
    • Not applicable
  • Chemical Stability
    • Stable under normal conditions.
  • Corrosivity
    • Corrosive to metals

International Transportation

  • Packing Group
    • II
  • Chemical Class
    • 8
  • UN Number
    • 3264
  • Harmonized System Code
    • 38249996
  • Physical Form : Liquid
  • pH : Acidic
  • Flashpoint : Not applicable
  • Odor : Stinging
  • Melting Point/Range : No data available
  • Color : Colorless
  • Boiling Point/Range : 100 °C (1,013 hPa)
  • Incompatible Materials : Glass and silicate-containing materials are attacked, Contact with strong acids liberates hydrogen fluoride, Corrosive in contact with metal
  • Ignition Temperature : Not applicable
  • Chemical Stability : Stable under normal conditions.
  • Corrosivity : Corrosive to metals
  • Packing Group : II
  • Chemical Class : 8
  • UN Number : 3264
  • Harmonized System Code : 38249996
Property
Value
ammonium fluoride (NH4F)
35.2 - 37.2 %
assay hydrofluoric acid (HF)
4.2 - 5.2 %
residue on ignition (SO4)
Max. 40 ppm
aluminium (Al)
Max. 1 ppm
arsenic, antimony (as As)
Max. 0.5 ppm
bismuth (Bi)
Max. 1 ppm
copper (Cu)
Max. 0.1 ppm
iron (Fe)
Max. 2 ppm
indium (In)
Max. 1 ppm
sodium (Na)
Max. 0.5 ppm
silicon (Si)
Max. 200 ppm
thallium (Tl)
Max. 1 ppm
heavy metals (as Pb)
Max. 2 ppm
chloride (Cl)
Max. 5 ppm
phosphate (PO4)
Max. 1 ppm
sulfate and sulfite(as SO4)
Max. 5 ppm