Buffered Oxide Etchants
Ammonium Fluoride Etching Mixture (19408)
AF 91-9 Puranal (Oxide Etch 10/1)
Overview
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Specifications
General Information
- Grade
- SemEG
Physical Properties
- Density
- 1.120 g/cm3 (20 °C)
- 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
General Information
- Grade
- SemEG
Physical Properties
- Density
- 1.120 g/cm3 (20 °C)
- 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
- Grade : SemEG
- Density : 1.120 g/cm3 (20 °C)
- 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