Products Description of Chromium(VI) Oxide, CAS 1333‑82‑0
Chromium trioxide (CrO₃) is a high‑performance inorganic compound presented as dark‑red to dark‑purple crystalline powder. It features excellent solubility in a broad range of solvents including water, sulfuric acid, nitric acid, ethanol, ether, acetic acid and acetone. Benefiting from its distinctive chemical characteristics, it finds extensive application across electroplating, pharmaceutical processing, printing, tanning and textile mordant dyeing industries.
Safety Notice: Per the preliminary carcinogen list released by IARC (International Agency for Research on Cancer) on October 27, 2017, hexavalent chromium compounds are categorized as Group 1 carcinogens. Mandatory safety precautions must be implemented throughout handling and usage.
Chromium(VI) oxide Chemical Properties
| Melting point | 196 °C (dec.)(lit.) |
| Boiling point | 330 °C |
| density | 2.7 |
| vapor pressure | 0Pa at 25℃ |
| Fp | 250°C |
| storage temp. | Store below +30°C. |
| solubility | 1.667g/l |
| form | macroporous |
| pka | -0.61[at 20 ℃] |
| color | Reddish-violet |
| Specific Gravity | 2.7 |
| PH | <1 (100g/l, H2O, 20℃) |
| Water Solubility | Highly soluble |
| FreezingPoint | 170~172℃ |
| Sensitive | Hygroscopic |
| Merck | 142235 |
| 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) |
| 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 |
| 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 |
Product Application of Chromium(VI) Oxide CAS#1333‑82‑0
Chromium trioxide is a core industrial raw material extensively deployed within the electroplating sector. It is the indispensable feedstock for chromium plating on a wide array of articles including bicycles, sewing machines, watches, meters & instruments, flashlights and general hardware components. Furthermore, it supports the manufacturing of high‑purity metallic chromium.
Beyond electroplating, this compound acts as a vital starting material for producing chromium oxide green and zinc chrome yellow pigments. It also plays a critical role in catalyst fabrication for low‑temperature shift reactions, high‑temperature shift reactions, and high‑pressure methanol synthesis processes.
In textile processing, it works as an effective mordant for wool dyeing, and serves as a powerful oxidizing agent across printing and dyeing workflows. Besides the above‑mentioned uses, chromium trioxide is suitable for wood preservation and antiseptic treatment.
