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Chromates

Sodium dichromate dihydrate (31295)

analytical reagent, Reag. ACS, assay 99.5 - 100.5%

Overview
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Potassium dichromate is an orange to red colored, crystalline, inorganic compound that emits toxic chromium fumes upon heating. Potassium dichromate is highly corrosive and is a strong oxidizing agent.  It is used in painting, printing, electroplating and pyrotechnics.
Specifications

General Information

  • CAS Number
    • 7789-12-0
  • Synonyms
    • Sodium bichromate
  • Linear Formula
    • Na2Cr2O7 · 2H2O

Physical Properties

  • pH
    • 3.5 (20 °C)
  • Odor
    • Odorless
  • Color
    • Orange
  • Physical Form
    • Crystalline powder
  • Density
    • 2.52 g/cm3 (20 °C)
  • Boiling Point/Range
    • Decomposes on heating.
  • Melting Point/Range
    • 320 °C
  • Vapor Pressure
    • No data available hectopascal

Safety Information

  • Thermal Decomposition
    • No decomposition if used as directed: 450 °C
  • Flammability
    • The product is not flammable.
  • Incompatible Materials
    • Corrosive in contact with metals, Organic materials, Combustible material, Hydrazine, Reducing agents
  • Chemical Stability
    • Stable under recommended storage conditions.

International Transportation

  • Sub Class 1
    • 5.1
  • Packing Group
    • II
  • Harmonized System Code
    • 2841509100
  • Chemical Class
    • 6.1
  • UN Number
    • 3086

General Information

  • CAS Number
    • 7789-12-0
  • Synonyms
    • Sodium bichromate
  • Linear Formula
    • Na2Cr2O7 · 2H2O

Physical Properties

  • pH
    • 3.5 (20 °C)
  • Odor
    • Odorless
  • Color
    • Orange
  • Physical Form
    • Crystalline powder
  • Density
    • 2.52 g/cm3 (20 °C)
  • Boiling Point/Range
    • Decomposes on heating.
  • Melting Point/Range
    • 320 °C
  • Vapor Pressure
    • No data available hectopascal

Safety Information

  • Thermal Decomposition
    • No decomposition if used as directed: 450 °C
  • Flammability
    • The product is not flammable.
  • Incompatible Materials
    • Corrosive in contact with metals, Organic materials, Combustible material, Hydrazine, Reducing agents
  • Chemical Stability
    • Stable under recommended storage conditions.

International Transportation

  • Sub Class 1
    • 5.1
  • Packing Group
    • II
  • Harmonized System Code
    • 2841509100
  • Chemical Class
    • 6.1
  • UN Number
    • 3086
  • CAS Number : 7789-12-0
  • Synonyms : Sodium bichromate
  • Linear Formula : Na2Cr2O7 · 2H2O
  • pH : 3.5 (20 °C)
  • Odor : Odorless
  • Color : Orange
  • Physical Form : Crystalline powder
  • Density : 2.52 g/cm3 (20 °C)
  • Boiling Point/Range : Decomposes on heating.
  • Melting Point/Range : 320 °C
  • Vapor Pressure : No data available hectopascal
  • Thermal Decomposition : No decomposition if used as directed: 450 °C
  • Flammability : The product is not flammable.
  • Incompatible Materials : Corrosive in contact with metals, Organic materials, Combustible material, Hydrazine, Reducing agents
  • Chemical Stability : Stable under recommended storage conditions.
  • Sub Class 1 : 5.1
  • Packing Group : II
  • Harmonized System Code : 2841509100
  • Chemical Class : 6.1
  • UN Number : 3086
Property
Value
assay
99.5 - 100.5 %
aluminium (Al)
Max. 0.002 %
calcium (Ca)
Max. 0.002 %
copper (Cu)
Max. 0.001 %
iron (Fe)
Max. 0.002 %
potassium (K)
Max. 0.01 %
magnesium (Mg)
Max. 0.005 %
lead (Pb)
Max. 0.002 %
chloride (Cl)
Max. 0.001 %
sulfate (SO4)
Max. 0.005 %
water insoluble matter
Max. 0.005 %
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