ChemicalBook > CAS DataBase List > Chromium(III) oxide

Chromium(III) oxide

Product Name
Chromium(III) oxide
CAS No.
1308-38-9
Chemical Name
Chromium(III) oxide
Synonyms
CHROMIUM OXIDE;CHROME OXIDE;CHROMIUM SESQUIOXIDE;ci77288;CHROMIA;CHROMIC OXIDE;Chromium(Ⅲ) oxide;CHROMIUM (III) OXIDE;okhp1;pk5304
CBNumber
CB8394705
Molecular Formula
Cr2O3
Formula Weight
151.99
MOL File
1308-38-9.mol
More
Less

Chromium(III) oxide Property

Melting point:
2435 °C
Boiling point:
4000 °C
Density 
5.21
refractive index 
2.551
Flash point:
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
crystal system
Three sides
Merck 
14,2234
Space group
R3c
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.4960.4961.35990901200.2895
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)
More
Less

Safety

Safety Statements 
24/25
WGK Germany 
-
RTECS 
GB6475000
TSCA 
Yes
HS Code 
28199090
Hazardous Substances Data
1308-38-9(Hazardous Substances Data)
More
Less

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H317May cause an allergic skin reaction

H332Harmful if inhaled

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P321Specific treatment (see … on this label).

More
Less

N-Bromosuccinimide Price

Sigma-Aldrich
Product number
203068
Product name
Chromium(III) oxide
Purity
powder, 99.9% trace metals basis
Packaging
5g
Price
$83
Updated
2024/03/01
Sigma-Aldrich
Product number
203068
Product name
Chromium(III) oxide
Purity
powder, 99.9% trace metals basis
Packaging
25g
Price
$264
Updated
2024/03/01
Alfa Aesar
Product number
010688
Product name
Chromium(III) oxide, Puratronic?, 99.97% (metals basis)
Packaging
5g
Price
$53.5
Updated
2023/06/20
Alfa Aesar
Product number
010688
Product name
Chromium(III) oxide, Puratronic?, 99.97% (metals basis)
Packaging
25g
Price
$169
Updated
2023/06/20
Strem Chemicals
Product number
93-2437
Product name
Chromium(III) oxide, 98%
Packaging
250g
Price
$29
Updated
2024/03/01
More
Less

Chromium(III) oxide Chemical Properties,Usage,Production

Description

Chromium(III) oxide is among the ten most abundant compounds in the Earth's crust. It is one of four oxides of chromium, chemical formula Cr2O3. It is commonly called "chrome green" when used as a pigment; however it was referred to as “viridian” when it was first discovered.

Chromium(III) oxide is a very refractory ceramic colorant (even a 50% mix with a high borax frit will not even begin to melt it in a crucible). Chrome oxide is the only stable oxide of the metal chromium. It is a bright to dark green crystalline powder insoluble in alkalis and acids. It is manufactured from the mineral Chromite mined in southern Africa, Asia, Turkey and Cuba. As with other powerful coloring agents, chrome must be milled fine enough to eliminate specking in glass or glaze.
Chromium is a "fast" colorant, meaning can produce strong green colors under all furnace conditions, slow or fast, reducing or oxidizing. It is also a flat colorant (due to its refractory nature), it usually produces an army helmet opaque green. It is powerful, typically only 2% will produce a dark color. It cannot be used to make a metallic glaze.
Chrome oxide is usually employed in raw glazes whereas potassium dichromate is used in fritted glazes.

Chemical Properties

Chromium oxide is a bright green, odorless powder. Chromium(III) oxide pigments are thermally stable and insoluble in water.
Chromium oxide pigments, also called chromium oxide green pigments, consist of chromium(III) oxide [1308-38-9], Cr2O3,Mr 151.99. Chromium oxide green is one of the few single-component pigments with green coloration. Chrome green is a blend of chrome yellow and iron blue pigments; phthalochrome green is a blend of chrome yellow and blue phthalocyanine pigments.
Alkali dichromates are used as starting materials for the production of chromium(III) oxide pigments. They are not classified as hazardous materials and are not subject to international transport regulations. As long as they are kept dry their utility as a pigment is practically unlimited.

Physical properties

Green hexagonal crystal system; corundum type structure; density 5.22 g/cm3; melts at 2,330°C; vaporizes above 3,000°C; insoluble in water and alcohol.

Uses

In abrasives, refractory materials, electric semiconductors; as pigment, particularly in coloring glass; in alloys; printing fabrics and banknotes; as catalyst for organic and inorganic reactions.

Uses

Chromium oxide (Cr2O3) is a dull green synthetic inorganic pigment, which can be used in all types of paint systems where high chemical resistance and outstanding light-fastness are required.

Uses

Chromium(III) oxide is used as pigment for coloring green on glass and fabrics. Other important applications are in metallurgy; as a component of refractory bricks, abrasives and ceramics; and as a catalyst in hydrogenation, hydrogenolysis and many other organic conversion reactions. It also is used to prepare other chromium salts.

Preparation

Chromium(III) oxide can be obtained by thermal decomposition of ammonium dichromate. Above ca. 200 °C, a highly voluminous product is formed with elimination of nitrogen. The pigment is obtained after addition of alkali salts (e.g., sodium sulfate) and subsequent calcination.
In the industrial process, a mixture of ammonium sulfate or chloride and sodium dichromate is calcined:
Na2Cr2O7.2 H2O + (NH4)2SO4 →Cr2O3 + Na2SO4 + 6 H2O + N2

Definition

Chromium oxide (Cr2O3) also called green rouge is a dull yellowish-green pigment that may be prepared by blending an alkali dichromate with sulfur or with a carbonaceous material. Reduction to chrome (III) oxide is achieved in a kiln at 1000°C. And it is used chiefly for platinum and stainless steels.

Definition

chromium sesquioxide: A green crystallinewater-insoluble salt, Cr2O3; r.d. 5.21;m.p. 2435°C; b.p. 4000°C. It is obtainedby heating chromium in astream of oxygen or by heating ammoniumdichromate. The industrialpreparation is by reduction ofsodium dichromate with carbon.Chromium(III) oxide is amphoteric,dissolving in acids to give chromium(III) ions and in concentratedsolutions of alkalis to give chromites.It is used as a green pigment in glass,porcelain, and oil paint.

Reactions

Chromium(III) oxide is amphoteric. Although insoluble in water, it dissolves in acid to produce hydrated chromium ion, [Cr(H2O)6]3+. It dissolves in concentrated alkali to yield chromite ion. When heated with finely divided aluminum or carbon it is reduced to chromium metal:
Cr2O3 + 3Al2Cr + Al2O3
Heating with chlorine and carbon yields chromium(III) chloride:
Cr2O3 + 3Cl2 + 3C2CrCl3 + 3CO
If chromium(III) oxide (also known as chrome green) is heated with potassium carbonate and potassium nitrate, the mixture slowly turns yellow. This colour change stems from the formation of potassium chromate, K2CrO4, in which chromium is found in oxidation state vi.

General Description

Chromium (III) oxide is a chromium complex in which the chromium ion is in +3 oxidation state. The synthesis of its sub-micron powder has been reported.? The IR and Raman spectra of chromium (III) oxide have been studied.? The impact of adding lysozyme on the stability of chromium (III) oxide (Cr2O3) suspension has been evaluated.

Hazard

Toxic by ingestion and inhalation.

Flammability and Explosibility

Not classified

Safety Profile

Confirmed carcinogen with experimental tumorigenic data. Mutation data reported. Probably a severe

Toxicology

Chromium(III) oxide, which forms the basis of chromium oxide pigments, crystallizes in a corundum lattice. Chromium oxide green pigments (Cr2O3, C.I. Pigment Green 17) contain only trivalent chrome. Acute toxicity: rat, oral, LD50>10 000 mg/kg.

Potential Exposure

Chromium(III) oxide is used as a paint pigment, a fixative for certain textile dyes; in the manufacture of chromium; and a catalyst.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately.If this chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPRif heart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, getmedical attention. Give large quantities of water andinduce vomiting. Do not make an unconscious personvomit.

storage

(1) Color Code—Blue: Health Hazard/Poison:Store in a secure poison location. (2) Color Code—Yellow:Reactive Hazard; Store in a location separate from othermaterials, especially flammables and combustibles.Chromium(III) oxide must be stored to avoid contact withstrong oxidizers (such as chlorine, bromine, and fluorine),glycerol, and oxygen difluoride, since violent reactionsoccur. A regulated, marked area should be establishedwhere chromium(III) oxide is handled, used, or stored.Store in tightly closed containers in a cool, well-ventilatedarea.

Shipping

UN3086 Toxic solids, oxidizing, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, 5.1-Oxidizer. Technical Name Required. Spill Handling: Evacuate persons not wearing protective equipment from the danger area of spill or leak until cleanup is complete. Remove all ignition sources. Collect powdered material in the most convenient and safe manner and deposit in sealed containers. Ventilate area after clean-up is complete. It may be necessary to contain and dispose of this chemical as a hazardous waste. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. Contact your local or federal environmental protection agency for specific recommendations. If employees are required to clean-up spills, they must be properly trained and equipped. OSHA 1910.120(q) may be applicable.

Properties and Applications

TEST ITEMS

SPECIFICATION

APPEARANCE

GREEN POWDER

CONTENT OF Cr 2 O 3

85% min

SHADE

YELLOWISH

HYDROTROPE

0.5% max

OIL ABSORPTION

25% max

RESIDUE ON 45 MESH

0.1% max

WATER SOLUBLE

0.3% max

VOLATITE 105 °C

0.05% max

TINTING STRENGTH

95-100 %

pH VALUE OF AQUEOUS SUSPENSION

5-8

Structure and conformation

Chromium oxide is a dense, crystalline material, density 5.2 g/cm3, of the corundum type. It is quite hard-abut 9 on the Moh scale-which makes it a good grinding material, but too abrasive for many pigment applications. The particle size depends on the manufacturing process, but it is distributed around mean values in the range 0.5-0.6 μm. The refractive index of chromium oxide is quite high, 2.5, which is almost as high as that of rutile TiO2, 2.7. Chromium oxide pigments are green with an olive green tint. Small particles are lighter green with a yellowish hue, whereas larger particles are darker, with a bluish tint. Chromium oxide pigments are very inert materials with outstanding lightfastness and excellent resistance to acids, alkalis, and high temperatures.

Incompatibilities

A strong oxidizer. Contact with reducing agents; organics, and combustibles may be violent

Chromium(III) oxide Preparation Products And Raw materials

Raw materials

Chromic sulfate Hydrogen Sulfide High speed pulverizer Phthalocyanine blue pigment filter paper ChroMiuM hydroxide Sodium dichromate dihydrate Prussian Blue Sulfur dioxide Chromium(VI) oxide Sulfur trioxide Potassium dichromate Middle chrome yellow Lead chrome yellow pigment Copper(II) phthalocyanine Cadmium sulfide Chromate, Ion chromatography standard solution, Specpure, CrO4ˉ2 1000μg/ml Filter press Sulphur Barium chloride Potassium chloride Potassium sulfate

Preparation Products

Alkyd resin paint Sodium dichromate dihydrate Water proof agent CR Chromium Furfuryl alcohol
More
Less

Chromium(III) oxide Suppliers

Belgium 1 Canada 1 China 384 Czech Republic 1 Europe 4 France 2 Germany 6 Ghardaia 1 India 31 Japan 7 Slovakia 1 South Korea 1 Switzerland 1 The Netherlands 1 United Kingdom 9 United States 52 Global 503
HBCChem, Inc.
Tel
+1-510-219-6317
Fax
+1-650-486-1361
Email
sales@hbcchem.com
Country
United States
ProdList
10648
Advantage
60
Alfa Chemistry
Tel
Fax
1-516-927-0118
Email
Info@alfa-chemistry.com
Country
United States
ProdList
24072
Advantage
58
Aladdin Scientific
Tel
+1-+1(833)-552-7181
Email
sales@aladdinsci.com
Country
United States
ProdList
52924
Advantage
58
Aladdin Scientific
Tel
+1-+1(833)-552-7181
Email
sales@aladdinsci.com
Country
United States
ProdList
57505
Advantage
58
United States Biological
Tel
--
Fax
--
Email
sales@advtechind.com
Country
United States
ProdList
6075
Advantage
58
Noah Chemicals
Tel
--
Fax
--
Email
solutions@noahtech.com
Country
United States
ProdList
881
Advantage
58
BassTech International
Tel
--
Fax
--
Email
Info@basstechintl.com
Country
United States
ProdList
55
Advantage
58
Sarchem Laboratories, Inc.
Tel
--
Fax
--
Email
info@sarchemlabs.com
Country
United States
ProdList
736
Advantage
58
Bruchem, Inc.
Tel
--
Fax
--
Email
sales@bruchem.com
Country
United States
ProdList
576
Advantage
58
United States Biological
Tel
--
Fax
--
Email
chemicals@usbio.net
Country
United States
ProdList
6214
Advantage
80
GFS Chemicals Inc
Tel
--
Fax
--
Email
service@gfschemicals.com
Country
United States
ProdList
2329
Advantage
58
Strem Chemicals, Inc.
Tel
--
Fax
--
Email
info@strem.com
Country
United States
ProdList
4910
Advantage
86
Riedel-de Haen AG
Tel
--
Fax
--
Country
United States
ProdList
6773
Advantage
87
Alfa Chemistry
Tel
--
Fax
--
Email
info@Alfa-Chemistry.com
Country
United States
ProdList
6814
Advantage
0
Advance Research Chemicals, Inc.
Tel
--
Fax
--
Email
sales@fluoridearc.com
Country
United States
ProdList
297
Advantage
60
Waterstone Technology, LLC
Tel
--
Fax
--
Email
sales@waterstonetech.com
Country
United States
ProdList
6786
Advantage
30
ProChem, Inc.
Tel
--
Fax
--
Email
prochem1@aol.com
Country
United States
ProdList
1691
Advantage
66
ChemService Inc.
Tel
--
Fax
--
Country
United States
ProdList
6379
Advantage
68
Naugra Export
Tel
--
Fax
--
Country
United States
ProdList
1332
Advantage
47
DuPont Specialty Colorants & Additives
Tel
--
Fax
--
Country
United States
ProdList
1186
Advantage
87
HONEST JOY HOLDINGS LIMITED
Tel
--
Fax
--
Email
sales@honestjoy.cn
Country
United States
ProdList
6675
Advantage
54
2A PharmaChem USA
Tel
--
Fax
--
Email
sales@2apharmachem.com
Country
United States
ProdList
6137
Advantage
39
3B Scientific Corporation
Tel
--
Fax
--
Email
sales@3bsc.com
Country
United States
ProdList
6718
Advantage
47
NILE CHEMICALS
Tel
--
Fax
--
Email
nilechem@vsnl.net
Country
United States
ProdList
1369
Advantage
61
Nanostructured & Amorphous Materials Inc.
Tel
--
Fax
--
Email
sales@nanoamor.com
Country
United States
ProdList
66
Advantage
72
SKC Inc.
Tel
--
Fax
--
Email
skcorder@skcinc.com
Country
United States
ProdList
1378
Advantage
76
Wintersun Chemical
Tel
--
Fax
--
Email
purchasing@wintersunchem.com
Country
United States
ProdList
776
Advantage
68
Leonid Chemicals Private Limited
Tel
--
Fax
--
Email
careers@leonidchemicals.com
Country
United States
ProdList
1700
Advantage
43
Sciencelab.com, Inc.
Tel
--
Fax
--
Email
accounting@sciencelab.com
Country
United States
ProdList
4159
Advantage
82
Advance Scientific & Chemical
Tel
--
Fax
--
Email
sales@advance-scientific.com
Country
United States
ProdList
6419
Advantage
71
Loba Chemie Pvt. Ltd.
Tel
--
Fax
--
Country
United States
ProdList
1945
Advantage
71
City Chemical LLC
Tel
--
Fax
--
Email
sales@citychemical.com
Country
United States
ProdList
6708
Advantage
72
ESPI Corp Inc.
Tel
--
Fax
--
Email
sales@espimetals.com
Country
United States
ProdList
507
Advantage
76
Perkin Elmer Life Sciences Inc.
Tel
--
Fax
--
Email
techsupport@nen.com
Country
United States
ProdList
1296
Advantage
86
EMD Chemicals Inc.
Tel
--
Fax
--
Email
emdinfo@emdchemicals.com
Country
United States
ProdList
1525
Advantage
77
Spectrum Chemicals & Laboratory Products
Tel
--
Fax
--
Email
sales@spectrumchemical.com
Country
United States
ProdList
6699
Advantage
77
Kiran Light Laboratories
Tel
--
Fax
--
Country
United States
ProdList
863
Advantage
43
Elementis Pigments, Inc.
Tel
--
Fax
--
Country
United States
ProdList
9
Advantage
64
MV Laboratories, Inc.
Tel
--
Fax
--
Email
info@mvlaboratories.com
Country
United States
ProdList
581
Advantage
42
Alfa Aesar
Tel
--
Fax
--
Email
tech@alfa.com
Country
United States
ProdList
6814
Advantage
81
Integra Chemical Company
Tel
--
Fax
--
Email
chemicals@integrachem.com
Country
United States
ProdList
716
Advantage
51
I.C. Trading Co., Inc.
Tel
--
Fax
--
Email
sales@ic-trading.com
Country
United States
ProdList
26
Advantage
42
MATERION Inc.
Tel
--
Fax
--
Email
AdvancedMaterials@Materion.com
Country
United States
ProdList
1079
Advantage
74
Reade Advanced Materials
Tel
--
Fax
--
Email
info@reade.com
Country
United States
ProdList
206
Advantage
77
Fisher Scientific
Tel
--
Fax
--
Email
sales@fishersci.com
Country
United States
ProdList
2337
Advantage
86
J.T. Baker-A Division of Mallinckrodt Baker, Inc.
Tel
--
Fax
--
Country
United States
ProdList
1066
Advantage
82
City Chemicals Corporation
Tel
--
Fax
--
Country
United States
ProdList
6460
Advantage
72
Aithaca Chemical Corp.
Tel
--
Fax
--
Email
sales@aithaca.com
Country
United States
ProdList
1684
Advantage
30
Atlantic Equipment Engineers
Tel
--
Fax
--
Email
info@micronmetals.com
Country
United States
ProdList
177
Advantage
72
Chemat Technology, Inc.
Tel
--
Fax
--
Email
info@chemat.com
Country
United States
ProdList
569
Advantage
72
More
Less

View Lastest Price from Chromium(III) oxide manufacturers

Hebei Zhuanglai Chemical Trading Co Ltd
Product
Chromium(III) oxide 1308-38-9
Price
US $45.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20 tons
Release date
2024-12-18
HebeiShuoshengImportandExportco.,Ltd
Product
Chromium(III) oxide 1308-38-9
Price
US $6.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
2000KG/Month
Release date
2024-08-01
HebeiShuoshengImportandExportco.,Ltd
Product
Chromium oxide 1308-38-9
Price
US $6.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
2000KG/Month
Release date
2024-08-07

1308-38-9, Chromium(III) oxideRelated Search:

ChroMiuM hydroxide Potassium chromate Chromium Oxalic acid Carbon Black Cobalt oxide Ammonium dichromate Ferric oxide COBALT(III) OXIDE BLACK Lanthanum oxide Magnesium oxide Boron oxide Pentaerythritol Yttrium oxide Thulium oxide Europium Oxide Bismuth trioxide MANGANESE (III) OXIDE

  • CHROME OXIDE
  • CHROME GREEN
  • 383 GREEN NATO
  • 11661green
  • anadonisgreen
  • anhydridechromique
  • anhydridechromique(french)
  • c.i.77288
  • chromium(iii)oxide(2:3)
  • chromium(iv)oxide
  • chromiumoxide(cr2o3)
  • chromiumoxide(cr8o12)
  • Chromiumoxide,greencinnabar
  • chromiumoxidegreenpigments
  • chromiumoxidegreens
  • chromiumoxidepigment
  • chromiumoxidex1134
  • chromiumsesquioxide(chromium(iii)
  • chromiumsesquioxide(chromium(iii)oxide)
  • ci77288
  • cipigmentgreen17
  • cosmetichydrophobicgreen9409
  • cosmeticmicroblendchromeoxide9229
  • dichromiumtrioxide
  • greenchromeoxide
  • greenchromicoxide
  • greenchromiumoxide
  • greenoxideofchromium
  • greenoxideofchromiumoc-31
  • greenrouge
  • levanoxgreenga
  • oilgreen
  • okhp1
  • oxideofchromium
  • p106f10
  • pk5304
  • purechromiumoxidegreen59
  • ultramarinegreen
  • Chromium(III) oxide,(99.998% Cr) PURATREM
  • Chromiumoxidegreenpowder
  • Chromiumoxidehydrategreenpowder
  • CHROME OXIDE GREEN 99.0%MIN
  • CHROMIUM OXIDE GREE
  • CHROMIUM(III) OXIDE, POWDER, 1 MICRON, 9 8+%
  • CHROMIUM(III) OXIDE CA. 50 MICRONS 98&
  • CHROMIUM(III) OXIDE, 99.9%
  • Chromium(III) oxide, nanopowder, 99% metals basis
  • CHROMIUM(III) OXIDE PURE
  • Chromium Hemitrioxide
  • CHROMIUM(III) OXIDE, 99%, AMORPHOUS POWDER
  • lead chrome green
  • djichromium trioxide
  • Chromium(Ⅲ) oxide
  • Chromium(III) oxide, Puratronic (metals basis)
  • Chromium(III) oxide (99.995%-Cr) PURATREM
  • Chromium(III) oxide fused
  • C. I. Pigment Green 17 (77288)
  • ChroMiuM(III) oxide, aMorphous powder, 99% 500GR