Home Categories Inorganic chemistry Chromium sesquioxide
A2299412

Chromium sesquioxide , 98.0%metalsbasis,≤100nm , 1308-38-9

Synonym(s):
Chromia

CAS NO.:1308-38-9

Empirical Formula: Cr2O3

Molecular Weight: 151.99

MDL number: MFCD00010949

EINECS: 215-160-9

Pack Size Price Stock Quantity
1g RMB32.80 In Stock
5g RMB99.20 In Stock
25G RMB415.20 In Stock
100G RMB1288.80 In Stock
others     Enquire
Update time: 2022-07-08

PRODUCT Properties

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.

Description and Uses

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.

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.

Safety

Symbol(GHS) 
GHS07
Signal word  Danger
Hazard statements  H302-H317-H332
Precautionary statements  P261-P280g-P301+P312a-P304+P340-P321-P501a
Safety Statements  24/25
WGK Germany  -
RTECS  GB6475000
TSCA  Yes
HS Code  28199090

RELATED PRODUCTS