Chromium(VI) oxide manufacturers and suppliers

Chromium(VI) oxide suppliers

Properties

Melting point:: 196 °C (dec.)(lit.)

Boiling point:: 330 °C

Density: 2.7

vapor pressure: 0Pa at 25℃

Flash point:: 250°C

storage temp.: Store below +30°C.

solubility: 1.667g/l

pka: -0.61[at 20 ℃]

form: macroporous

color: Reddish-violet

Specific Gravity: 2.7

PH: <1 (100g/l, H2O, 20℃)

Water Solubility: Highly soluble

FreezingPoint: 170~172℃

Sensitive: Hygroscopic

Merck: 14,2235

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

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

WGK Germany: 3

RTECS: GB6650000

TSCA: Yes

HazardClass: 5.1

PackingGroup: II

HS Code: 28191000

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.

You can find Chromium(VI) oxide suppliers, manufacturers, and distributors from countries such as China, United States and the India here. Browse to the tetrahydrofuran product information displayed by the supplier, as well as the supplier's contact and capability information.