Molecular Structure of Chromium trioxide (CAS NO.10043-01-3):

IUPAC Name: trioxochromium
Molecular formula: CrO₃
Molar mass: 99.9943 g/mol
H bond acceptors: 3
H bond donors: 0
Freely Rotating Bonds: 0
Polar Surface Area: 51.21 Å²
Appearance: dark red granular solid
Odor: odorless
Density: 2.70 g/cm³ (20 °C)
Melting point: 197 °C
Boiling Point: 330 °C
Flash Point: 250°C
EINECS: 215-607-8
Water Solubility Highly soluble
Product Categories: Inorganic & organic chemicals; Inorganics
Synonyms: Anidride cromica ; anidridecromica ; anidridecromica ; Chrome bronze ; chrome(trioxydede) ; chrome(trioxydede)(french)[qr] ; chrometrioxydede ; chromia(CrO₃)

 Main application areas for inorganic chromium compounds industrial production. Chromium trioxide used for dyeing and printing industry, paint industry for the production of zinc chrome yellow, Cr₂O₃ organic industry for the production of low-temperature shift catalyst, the instrument of change agents, oxidation catalyst and high-pressure methanol catalyst. And also for the preservation of timber or waterproofing agent production and high purity such as electrolytic chromium metal.

Hazard Codes: O,T+,N,T
Risk Statements: 45-46-9-24/25-26-35-42/43-48/23-50/53-62-8
R45:May cause cancer. 
R46:May cause heritable genetic damage. 
R9:Explosive when mixed with combustible material. 
R24:Toxic in contact with skin. 
R25 :Toxic if swallowed. 
R26:Very toxic by inhalation. 
R35:Causes severe burns. 
R42/43:May cause sensitization by inhalation and skin contact. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R8 :Contact with combustible material may cause fire. 
R62:Risk of impaired fertility.
Safety Statements: 53-45-60-61-36/37/39-28-26-22
S53:Avoid exposure - obtain special instructions before use. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S22:Do not breathe dust.
RIDADR: UN 1463 5.1/PG 2
WGK Germany: 3
RTECS: GB6650000
HazardClass: 5.1
PackingGroup: II
HS Code: 28191000

 Chromium trioxide (CAS NO.10043-01-3) is highly toxic, corrosive and carcinogenic. It is the main example of the environmental hazard known as "hexavalent chromium". The related chromium (III) derivatives are not particularly dangerous, thus reductants are used to destroy chromium(VI) samples. Chromium trioxide, being a powerful oxidizer, will ignite some organic materials (such as ethanol) on contact.