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Metal Etchants

Phosphoric Acid Etching Mixture (21708)

PEWS 765-140-57-36, Puranal

General Information

  • CAS Number
    • 7664-38-2

Physical Properties

  • pH
    • Acidic
  • Flashpoint
    • Not applicable
  • Odor
    • Stinging
  • Physical Form
    • Liquid
  • Boiling Point/Range
    • 1,013 hPa
  • Color
    • Colorless

Safety Information

  • Oxidizing
    • The substance or mixture is not classified as oxidizing.
  • Thermal Decomposition
    • No decomposition if used as directed.
  • Flammable Gas Formation
    • Gives off hydrogen by reaction with metals.
  • Self Ignition
    • Not auto-flammable
  • Flammability
    • Not applicable
  • Corrosivity
    • Corrosive to metals
  • Incompatible Materials
    • Corrosive in contact with metals, Strong bases
  • Ignition Temperature
    • Not applicable

International Transportation

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

General Information

  • CAS Number
    • 7664-38-2

Physical Properties

  • pH
    • Acidic
  • Flashpoint
    • Not applicable
  • Odor
    • Stinging
  • Physical Form
    • Liquid
  • Boiling Point/Range
    • 1,013 hPa
  • Color
    • Colorless

Safety Information

  • Oxidizing
    • The substance or mixture is not classified as oxidizing.
  • Thermal Decomposition
    • No decomposition if used as directed.
  • Flammable Gas Formation
    • Gives off hydrogen by reaction with metals.
  • Self Ignition
    • Not auto-flammable
  • Flammability
    • Not applicable
  • Corrosivity
    • Corrosive to metals
  • Incompatible Materials
    • Corrosive in contact with metals, Strong bases
  • Ignition Temperature
    • Not applicable

International Transportation

  • Harmonized System Code
    • 38249996
  • Chemical Class
    • 8
  • UN Number
    • 3264
  • Packing Group
    • II
  • CAS Number : 7664-38-2
  • pH : Acidic
  • Flashpoint : Not applicable
  • Odor : Stinging
  • Physical Form : Liquid
  • Boiling Point/Range : 1,013 hPa
  • Color : Colorless
  • Oxidizing : The substance or mixture is not classified as oxidizing.
  • Thermal Decomposition : No decomposition if used as directed.
  • Flammable Gas Formation : Gives off hydrogen by reaction with metals.
  • Self Ignition : Not auto-flammable
  • Flammability : Not applicable
  • Corrosivity : Corrosive to metals
  • Incompatible Materials : Corrosive in contact with metals, Strong bases
  • Ignition Temperature : Not applicable
  • Harmonized System Code : 38249996
  • Chemical Class : 8
  • UN Number : 3264
  • Packing Group : II
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