Metal Etchants
Phosphoric Acid Etching Mixture (17531)
PWS 80-16-4(65) Puranal (Nickel-ALU Etch)
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General Information
- CAS Number
- 7664-38-2
Physical Properties
- Physical Form
- Liquid
- Melting Point/Range
- No data available
- Color
- Colorless
- Boiling Point/Range
- > 100 °C (1,013 hPa)
- Vapor Pressure
- similar to water
- pH
- -0.5
- Partition Coefficient
- No data available
- Odor
- Stinging
- Flashpoint
- Not applicable
Safety Information
- Incompatible Materials
- Reactions with various metals, Reactions with strong alkalies
- Flammable Gas Formation
- Gives off hydrogen by reaction with metals.
- Self Ignition
- Not auto-flammable
- Ignition Temperature
- Not applicable
- Flammability
- Not applicable
- Evaporation Rate
- No data available
- Oxidizing
- The substance or mixture is not classified as oxidizing.
- Corrosivity
- Corrosive to metals
- Thermal Decomposition
- No decomposition if used as directed.
International Transportation
- Packing Group
- II
- UN Number
- 3264
- Harmonized System Code
- 38249996
- Chemical Class
- 8
General Information
- CAS Number
- 7664-38-2
Physical Properties
- Physical Form
- Liquid
- Melting Point/Range
- No data available
- Color
- Colorless
- Boiling Point/Range
- > 100 °C (1,013 hPa)
- Vapor Pressure
- similar to water
- pH
- -0.5
- Partition Coefficient
- No data available
- Odor
- Stinging
- Flashpoint
- Not applicable
Safety Information
- Incompatible Materials
- Reactions with various metals, Reactions with strong alkalies
- Flammable Gas Formation
- Gives off hydrogen by reaction with metals.
- Self Ignition
- Not auto-flammable
- Ignition Temperature
- Not applicable
- Flammability
- Not applicable
- Evaporation Rate
- No data available
- Oxidizing
- The substance or mixture is not classified as oxidizing.
- Corrosivity
- Corrosive to metals
- Thermal Decomposition
- No decomposition if used as directed.
International Transportation
- Packing Group
- II
- UN Number
- 3264
- Harmonized System Code
- 38249996
- Chemical Class
- 8
- CAS Number : 7664-38-2
- Physical Form : Liquid
- Melting Point/Range : No data available
- Color : Colorless
- Boiling Point/Range : > 100 °C (1,013 hPa)
- Vapor Pressure : similar to water
- pH : -0.5
- Partition Coefficient : No data available
- Odor : Stinging
- Flashpoint : Not applicable
- Incompatible Materials : Reactions with various metals, Reactions with strong alkalies
- Flammable Gas Formation : Gives off hydrogen by reaction with metals.
- Self Ignition : Not auto-flammable
- Ignition Temperature : Not applicable
- Flammability : Not applicable
- Evaporation Rate : No data available
- Oxidizing : The substance or mixture is not classified as oxidizing.
- Corrosivity : Corrosive to metals
- Thermal Decomposition : No decomposition if used as directed.
- Packing Group : II
- UN Number : 3264
- Harmonized System Code : 38249996
- Chemical Class : 8
Property
Value
assay of phosphoric acid (H3PO4)
72.0 - 76.0 %
nitric acid
2.0 - 3.0 %
surface tension 20°C
Max. 35 mN/m
arsenic (As)
Max. 0.5 ppm
calcium (Ca)
Max. 20 ppm
cadmium (Cd)
Max. 5 ppm
cobalt (Co)
Max. 5 ppm
copper (Cu)
Max. 5 ppm
iron (Fe)
Max. 10 ppm
potassium (K)
Max. 5 ppm
magnesium (Mg)
Max. 10 ppm
manganese (Mn)
Max. 5 ppm
sodium (Na)
Max. 10 ppm
nickel (Ni)
Max. 5 ppm
lead (Pb)
Max. 5 ppm
zinc (Zn)
Max. 10 ppm
chloride (Cl)
Max. 1 ppm
sulfate (SO4)
Max. 30 ppm