MAGTRIEVE(TM)
magtrieve
CAS: 12018-01-8
Molecular Formula: CrO2
MAGTRIEVE(TM) - Names and Identifiers
| Name | magtrieve |
| Synonyms | accroxc accroxr magtrieve MAGTRIEVE(TM) chromiumdioxide chromium(iv)dioxide chromiumdioxide(cro2) Chromium oxide (CrO2) Magtrieve? chromium dioxide |
| CAS | 12018-01-8 |
| EINECS | 234-630-4 |
| InChI | InChI=1/Cr.2O/rCrO2/c2-1-3 |
MAGTRIEVE(TM) - Physico-chemical Properties
| Molecular Formula | CrO2 |
| Molar Mass | 83.99 |
| Density | 4.85g/mLat 25°C(lit.) |
| Melting Point | >375°C (dec.)(lit.) |
| Boling Point | decomposes to Cr2O3℃ [KIR78] |
| Water Solubility | insoluble H2O, soluble acids giving Cr+++and dichromate [KIR78] |
| Appearance | brown-black tetragonal powder |
| Merck | 13,2254 |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | Brown-black magnetic powder. Melting point 300 °c. The relative density was 4.89. Soluble in nitric acid, insoluble in water. It is metastable in air. It decomposes to chromium oxide and oxygen at 250-500 °c. |
MAGTRIEVE(TM) - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36 - Irritating to the eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | GB6400000 |
MAGTRIEVE(TM) - Nature
Open Data Verified Data
brown powder, tetragonal rutile structure. Soluble in hot hydrochloric acid, insoluble in water and organic solvents. The saturation magnetization is 126 nTm3- g-l, the Curie temperature is 116 ° C., the resistivity is 2.5 × 10-4, the magnetostriction coefficient is 1 × 10-6, and Ki = 3 × 104 J/1113.
Last Update：2024-01-02 23:10:35
MAGTRIEVE(TM) - Preparation Method
Open Data Verified Data
Crz 03 fine powder obtained by thermal decomposition of crystalline ammonium dichromate (NH4 )2Cr2 07 at 150~250 ℃, Cr2 03 as raw material, the reaction is carried out in a sealed platinum container, and then the Cr02 magnetic powder is produced by hot-pressing hydrolysis. In order to ensure the performance of the magnetic powder, the obtained Cr2 03 magnetic powder should be surface treated, dispersed in sodium sulfite aqueous solution, stirred and heated, filtered, washed and dried.
Last Update：2022-01-01 08:59:19
MAGTRIEVE(TM) - Use
Open Data Verified Data
It is mainly used in the production of audio tape, phonograph records, memory devices and permanent magnets. It is also used as a catalyst.
Last Update：2022-01-01 08:59:19
MAGTRIEVE(TM) - Safety
Open Data Verified Data
toxicity and protection: see chromic anhydride. Sealed with glass bottles, 500g net weight per bottle. Then placed in a wooden box with a soft plug to prevent movement during transport. Should be stored in a cool, ventilated, dry, clean warehouse. The package is sealed to prevent moisture. Not strong
Acid and flammable materials are stored and mixed. In the transport process to prevent rain and sun exposure. When loading and unloading should be light to prevent packaging rupture. Fire can be suppressed with water, dry sand, and all kinds of fire extinguisher.
Last Update：2022-01-01 11:00:33
MAGTRIEVE(TM) - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | chromium dioxide is an inorganic compound with the chemical formula CrO2, which is a black magnetic solid. It has been widely used in the emulsion required for tape production. With the increasing popularity of CDs and DVDs, the use of chromium dioxide has also declined. However, it is still used in the data tapes of enterprise-level storage systems. Oxide manufacturers and tape manufacturers believe that chromium dioxide is one of the best magnetic recording particles ever invented. |
| structure | CrO2, like many metal oxides, uses rutile structure. Therefore, each Cr(IV) center has an octahedral coordination mode, and the geometric configuration of each oxygen is a plane triangle. |
| toxicity | see chromic anhydride. |
| use | is mainly used for the production of audio tapes, phonograph records, memory devices and permanent magnets. It is also used as a catalyst. |
| production method | 5.68kg of chromic anhydride and 2.25L of water are stirred for 10 min, 11.94g of antimony trioxide, 323.88g of γ-Fe2O323.88g of chromium trioxide and 2.88kg of chromium trioxide are added, after stirring for 20 min, the above mixture is added into an autoclave, and reacted at 270 ℃ and 45 × 103kPa for 15h to obtain a finished chromium dioxide product. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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