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    Chromium Oxide

    Chromium Oxide in Tradeasia

    IUPAC Name

    Oxo(oxochromiooxy)chromium

    Cas Number

    1308-38-9

    HS Code

    2819

    Formula

    Cr2O3

    Industry

    -

    Basic Info

    Appearance

    Green Crystalline Powder

    Common Names

    Chromium (III) Oxide; Chromia

    Packaging

    25 Kg Jerrycan

    Brief Overview

    Chromium oxide or chromia occurs in nature as a rare mineral called eskolaite and is a highly insoluble compound with high thermal stability, having the properties of both an acid and a base.

     

    Manufacturing Process

    It is produced through the reduction of sodium dichromate using sulfur at high temperatures indicated by the redox reaction

    Na2Cr2O7 + S → Na2SO4 + Cr2O3

    Ammonium dichromate, on heating, decomposes into chromium (III) oxide, water, and nitrogen

    (NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O

    Chromium (iii) carbonate is heated to form chromium (III) oxide and carbon dioxide:

    Cr2(CO3)3 → Cr2O3 + 3CO2

    Ink, Glass, and Paint Industry

    - used as the green pigment

     

    Ceramic Industry

    - colorant

    - used to produce a faint green tinge in glazes

     

    Leather Industry

    - abrasive for polishing or stropping the edges of razors, knives, and surfaces of optical devices

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