Chromium Sesquioxide CAS# 1308-38-9
Chromium Sesquioxide CAS# 1308-38-9 - Image 2
1-Ethyl-2-pyrrolidone CAS#2687-91-4
Chromium Sesquioxide CAS# 1308-38-9 - Image 4

Chromium Sesquioxide CAS# 1308-38-9

Chromium oxide is a basic inorganic chemical raw material. Its chemical name is chromium trioxide, Cr2O3. It belongs to the trigonal crystal system. If a hexagonal unit cell is taken, the unit cell parameters are 4.960x 4.960×13.584 and the axial ratio is 4.473. Cr2O3 has a γ-Al2O3 structure. This rigid crystal is composed of oxygen ions that are closely packed and M3+ ions fill the octahedral gaps formed by these close packings.It is known that the ionic radii of Cr3+ and O2- are 0.069nm and 0.132nm respectively, and the ratio of positive and negative ionic radii is 0.52, in the range of 0.414~0.732. Therefore, the coordination number of Cr3+ is 6, so it is in the octahedral gap.

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Chromium Sesquioxide CAS# 1308-38-9

Chromium(III) oxide Basic information
Product Name: Chromium(III) oxide
Synonyms: cipigmentgreen17;cosmetichydrophobicgreen9409;cosmeticmicroblendchromeoxide9229;dichromiumtrioxide;greenchromeoxide;

greenchromicoxide;greenchromiumoxide;greenoxideofchromium
CAS: 1308-38-9
MF: Cr2O3
MW: 151.99
EINECS: 215-160-9
Product Categories: Inorganics;INORGANIC & ORGANIC CHEMICALS;Dyes and Pigments;Inorganic chemistry;dyestuff metal chrome;metal oxide
Mol File: 1308-38-9.mol
Chromium(III) oxide Structure
Chromium(III) oxide Chemical Properties
Melting point 2435 °C
Boiling point 4000 °C
density 5.21
refractive index 2.551
Fp 3000°C
storage temp. Room Temperature
solubility Insoluble in all solvents
form powder
color Pale to dark green
Specific Gravity 5.22
Odor at 100.00?%. odorless
Water Solubility Insoluble
Crystal Structure Trigonal
Merck 14,2234
Exposure limits NIOSH: IDLH 25 mg/m3; TWA 0.5 mg/m3
Stability: Stable.
CAS DataBase Reference 1308-38-9(CAS DataBase Reference)
NIST Chemistry Reference Chromium(iii) oxide(1308-38-9)
EPA Substance Registry System Chromium(III) oxide (1308-38-9)

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