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Metal Etchants

Phosphoric Acid Etching Mixture (17708)

PEWS 765-140-57-36 Puranal (Aluminium Etch Leach)

Physical Properties

  • Flashpoint
    • Not applicable
  • Boiling Point/Range
    • > 100 °C (1,013 hPa)
  • pH
    • Acidic
  • Odor
    • Stinging
  • Color
    • Colorless
  • Physical Form
    • Liquid

Safety Information

  • Corrosivity
    • Corrosive to metals
  • Ignition Temperature
    • Not applicable
  • Thermal Decomposition
    • No decomposition if used as directed.
  • Incompatible Materials
    • Corrosive in contact with metals, Hydrogen by reaction with metals

International Transportation

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

Physical Properties

  • Flashpoint
    • Not applicable
  • Boiling Point/Range
    • > 100 °C (1,013 hPa)
  • pH
    • Acidic
  • Odor
    • Stinging
  • Color
    • Colorless
  • Physical Form
    • Liquid

Safety Information

  • Corrosivity
    • Corrosive to metals
  • Ignition Temperature
    • Not applicable
  • Thermal Decomposition
    • No decomposition if used as directed.
  • Incompatible Materials
    • Corrosive in contact with metals, Hydrogen by reaction with metals

International Transportation

  • Packing Group
    • II
  • UN Number
    • 3264
  • Chemical Class
    • 8
  • Harmonized System Code
    • 38249996
  • Flashpoint : Not applicable
  • Boiling Point/Range : > 100 °C (1,013 hPa)
  • pH : Acidic
  • Odor : Stinging
  • Color : Colorless
  • Physical Form : Liquid
  • Corrosivity : Corrosive to metals
  • Ignition Temperature : Not applicable
  • Thermal Decomposition : No decomposition if used as directed.
  • Incompatible Materials : Corrosive in contact with metals, Hydrogen by reaction with metals
  • Packing Group : II
  • UN Number : 3264
  • Chemical Class : 8
  • Harmonized System Code : 38249996
Property
Value
assay of phosphoric acid (H3PO4)
70.83 - 73.83 %
acetic acid (CH3COOH)
8.77 - 10.17 %
nitric acid
1.75 - 2.95 %
arsenic (As)
Max. 0.5 ppm
calcium (Ca)
Max. 10.0 ppm
copper (Cu)
Max. 1.0 ppm
iron (Fe)
Max. 10.0 ppm
potassium (K)
Max. 3.0 ppm
lithium (Li)
Max. 1.0 ppm
magnesium (Mg)
Max. 5.0 ppm
manganese (Mn)
Max. 0.5 ppm
sodium (Na)
Max. 10.0 ppm
nickel (Ni)
Max. 1.0 ppm
antimony (Sb)
Max. 2.0 ppm
silicon (Si)
Max. 1.0 ppm
strontium (Sr)
Max. 1.0 ppm
heavy metals (as Pb)
Max. 5.0 ppm
chloride (Cl)
Max. 1 ppm
sulfate (SO4)
Max. 20 ppm