Chromium(VI) oxide
Chromium(VI) oxide
- CAS:
- 1333-82-0
- MF:
- CrO3
- MW:
- 99.99
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Properties
- Melting point:
- 196 °C (dec.)(lit.)
- Boiling point:
- 330 °C
- Density
- 2.7
- bulk density
- 900kg/m3
- vapor pressure
- 0Pa at 25℃
- Flash point:
- 250°C
- storage temp.
- Store below +30°C.
- solubility
- 1.667g/l
- form
- macroporous
- pka
- -0.61[at 20 ℃]
- Specific Gravity
- 2.7
- color
- Reddish-violet
- PH
- <1 (100g/l, H2O, 20℃)
- Water Solubility
- Highly soluble
- FreezingPoint
- 170~172℃
- Sensitive
- Hygroscopic
- Merck
- 14,2235
- crystal system
- Nogata
- Space group
- Ama2
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.5743 0.8557 0.4789 90 90 90 0.2353
- Exposure limits
- ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
- Stability:
- Stable. Strong oxidizer. Reacts with most organic material in a violent and often explosive fashion. Moisture sensitive.
- InChIKey
- WGLPBDUCMAPZCE-UHFFFAOYSA-N
- CAS DataBase Reference
- 1333-82-0(CAS DataBase Reference)
- NIST Chemistry Reference
- Chromium trioxide(1333-82-0)
- EPA Substance Registry System
- Chromium(VI) trioxide (1333-82-0)
Safety Information
- Symbol(GHS)
GHS03,GHS05,GHS06,GHS08,GHS09
- Signal word
- Danger
- Hazard statements
- H271-H301+H311-H314-H317-H330-H334-H335-H340-H350-H361f-H372-H410
- Precautionary statements
- P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
- Hazard Codes
- O,T+,N,T
- Risk Statements
- 45-46-9-24/25-26-35-42/43-48/23-50/53-62-8
- Safety Statements
- 53-45-60-61-36/37/39-28-26-22
- RIDADR
- UN 1463 5.1/PG 2
- OEB
- E
- OEL
- TWA: 0.0002 mg/m3 (8-hours)
- WGK Germany
- 3
- RTECS
- GB6650000
- TSCA
- Yes
- HazardClass
- 5.1
- PackingGroup
- II
- HS Code
- 28191000
- Hazardous Substances Data
- 1333-82-0(Hazardous Substances Data)
- Toxicity
- LD50 oral (rat) 80 mg/kg
PEL (OSHA) 0.1 mg (CrO3)/m3 (ceiling)
TLV-TWA (ACGIH) 0.05 mg (Cr)/m3
- IDLA
- 15 mg Cr(VI)/m3
Use
Chromium(VI) oxide is prepared by heating sodium dichromate dihydrate with a slight excess of sulfuric acid in a steel tank or cast iron container: Na2Cr2O7 + 2H2SO4 2CrO3 + 2NaHSO4 + H2O The temperature of the mixture is kept above the melting point of chromium(VI) oxide to evaporate water and separate the top layer of sodium bisulfate from the molten chromium(VI) oxide at the bottom. Temperature control and duration of heating is very crucial in the process. Temperatures over 197C (melting point), or allowing the molten mass to stand for a longer time, may result in decomposition of the product.
31 India supplier list of "Chromium(VI) oxide"
- Product Name:Chromium(VI) oxide, 99%
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Trader
- Country/Region: Gujarat,INDIA
- Product Name:Chromium(VI) oxide
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg And 1MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:Chromium(VI) oxide
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:Chromium(VI) oxide
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Mumbai,INDIA
- Product Name:Chromium(VI) oxide
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Punjab,INDIA
- Product Name:CHROMIUM TRIOXIDE
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
- Product Name:Chromium(VI) oxide
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:CHROMIUM TRIOXIDE 99%
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
- Product Name:Chromium(VI)oxide
- Products Intro:Brand:sigma aldrich | Product Number:1.00229 | Purity:foranalysisEMSURE?
- Company Type: Trader
- Country/Region: Bangalore,INDIA
- Product Name:Chromium Trioxide 99%
- Products Intro:Brand：Glrinnovations | OriginalID：GLR19.018424
- Company Type: Trader
- Country/Region: New Delhi,INDIA