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Basic Information
CAS No.: 1333-82-0
Name: Chromium(VI) trioxide
Article Data: 2
Molecular Structure:
Molecular Structure of 1333-82-0 (Chromium(VI) trioxide)
Formula: CrO3
Molecular Weight: 99.9942
Synonyms: Chromia(CrO3);Chromic anhydride;Chromic trioxide;Chromiumtrioxide;Chromium(VI) oxide;Chromium(VI) trioxide;Monochromium trioxide;Chromiun(Ⅵ)oxide;
EINECS: 215-607-8
Density: 2.7 g/cm3
Melting Point: 196 °C
Boiling Point: 330 °C
Flash Point: 250°C
Solubility: Highly soluble in water
Appearance: dark red crystals or powder
Hazard Symbols: OxidizingO,VeryT+,DangerousN
Risk Codes: 45-46-9-24/25-26-35-42/43-48/23-50/53-62-8
Safety: 53-45-60-61-36/37/39-28-26-22
Transport Information: UN 1463 5.1/PG 2
PSA: 51.21000
LogP: -0.35640
Synthetic route
7440-47-3

chromium

1333-82-0

chromium(VI) oxide

Conditions
ConditionsYield
In gaseous matrix laser-vaporized Cr atoms; O2 seeded in He; underwent supersonic expansion;

chromium chloride

1333-82-0

chromium(VI) oxide

Conditions
ConditionsYield
Stage #1: chromium chloride; water With ammonia pH=7.5;
Stage #2: at 300℃; for 8h; Calcination;
1333-82-0

chromium(VI) oxide

175424-48-3

3-methyl-6-benzyloxazolo[4,5-b]pyridin-2(3H)-one

175424-00-7

3-methyl-6-benzoyloxazolo[4,5-b]pyridin-2(3H)-one

Conditions
ConditionsYield
With tert.-butylhydroperoxide In dichloromethane82%
4926-28-7

2-Bromo-4-picoline

1333-82-0

chromium(VI) oxide

66572-56-3

2-bromoisonicotinic acid

Conditions
ConditionsYield
In (2S)-N-methyl-1-phenylpropan-2-amine hydrate; sulfuric acid82%
3N-HCl

3N-HCl

14495-51-3

2-bromo-5-chlorotoluene

1333-82-0

chromium(VI) oxide

174265-12-4

2-bromo-5-chlorobenzaldehyde

Conditions
ConditionsYield
With sulfuric acid In ethanol; water; acetic anhydride77%
333995-39-4

2-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5,6-difluoro-2,4,5,6-tetrahydrocyclopenta[c]pyrazole

1333-82-0

chromium(VI) oxide

333995-42-9

2-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5,6-difluoro-5,6-dihydrocyclopenta[c]pyrazol-4-one

Conditions
ConditionsYield
In hexane; acetic acid; ethyl acetate76%
7647-01-0

hydrogenchloride

91-63-4

2-methylquinoline

1333-82-0

chromium(VI) oxide

quinaldinium chlorochromate

Conditions
ConditionsYield
In water at 0℃; for 2.5h;72%
1333-82-0

chromium(VI) oxide

100991-28-4

1,11-dihydroxy-3-dodecyne

87519-39-9

11-hydroxy-3-dodecynoic acid

Conditions
ConditionsYield
In hexane; sulfuric acid; water; acetone68%
1607-17-6

pentrinitrol

1333-82-0

chromium(VI) oxide

67406-79-5

2-Nitryloxy-2,2-bis(nitryloxymethyl)propionsaeure

Conditions
ConditionsYield
With sulfuric acid60%
333995-54-3

2-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5,5-difluoro-2,4,5,6-tetrahydrocyclopenta[c]pyrazole

1333-82-0

chromium(VI) oxide

333995-57-6

2-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5,5-difluoro-5,6-dihydrocyclopenta[c]pyrazol-4-one

Conditions
ConditionsYield
In hexane; acetic acid; ethyl acetate50%
Raw Materials
7440-47-3
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Chemistry

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)

Uses

 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.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
human TCLo inhalation 110ug/m3 (0.11mg/m3)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 22, Pg. 291, 1980.
mouse LD50 intraperitoneal 14mg/kg (14mg/kg)   Nippon Eiseigaku Zasshi. Japanese Journal of Hygiene. Vol. 34, Pg. 193, 1979.
mouse LD50 intravenous 17100ug/kg (17.1mg/kg)   Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991.
mouse LD50 oral 127mg/kg (127mg/kg)   Zhonghua Yufangyixue Zazhi. Chinese Journal of Preventive Medicine. Vol. 14, Pg. 86, 1980.
mouse LDLo subcutaneous 20mg/kg (20mg/kg)   Senten Ijo. Congenital Anomalies. Vol. 19, Pg. 171, 1979.
rat LD50 intraperitoneal 58400ug/kg (58.4mg/kg)   Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991.
rat LD50 intravenous 9260ug/kg (9.26mg/kg)   Indian Journal of Pharmacology. Vol. 23, Pg. 153, 1991.
rat LD50 oral 80mg/kg (80mg/kg) LUNGS, THORAX, OR RESPIRATION: CYANOSIS

GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"

SKIN AND APPENDAGES (SKIN): HAIR: OTHER
Kenkyu Nenpo--Tokyo-toritsu Eisei Kenkyusho. Annual Report of Tokyo Metropolitan Research Laboratory of Public Health. Vol. 27, Pg. 119, 1976.
rat LDLo skin 55mg/kg (55mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: FOOD INTAKE (ANIMAL)

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"
National Technical Information Service. Vol. OTS0537097,

Safety Profile

Hazard Codes: OxidizingO,VeryT+,DangerousN,ToxicT
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

Specification

 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.