Cerium Oxide
Cerium Oxide
CAS: 1306-38-3
Molecular Formula: CeO2
Cerium Oxide - Names and Identifiers
| Name | Cerium Oxide |
| Synonyms | opaline nidoral cerium(4+) oxygen(2-) Cerium Oxide CeriumoxideREO CERIUM HYDROXIDE Cerium(IV) oxide Cerium (IV) oxide CERIUM (IV) HYDROXIDE CERIUM (III) HYDROXIDE Ceriumoxideyellowpowder CERIUM (IV) OXIDE HYDRATED Cerium(IV) oxide, dispersion ceric oxide coating quality balzers |
| CAS | 1306-38-3 |
| EINECS | 215-150-4 |
| InChI | InChI=1/Ce.2O/q+4;2*-2 |
| InChIKey | CETPSERCERDGAM-UHFFFAOYSA-N |
Cerium Oxide - Physico-chemical Properties
| Molecular Formula | CeO2 |
| Molar Mass | 172.1148 |
| Density | 7.13g/mLat 25°C(lit.) |
| Melting Point | 2600°C |
| Water Solubility | insoluble |
| Appearance | White powder |
| Specific Gravity | 7.132 |
| Color | Yellow |
| Odor | Odorless |
| Merck | 14,1989 |
| Storage Condition | Storage temperature: no restrictions. |
| Stability | Stable, but absorbs carbon dioxide from the air. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00010933 |
| Physical and Chemical Properties | Density 7.132 melting point 2600°C water-soluble insoluble |
| Use | Used in glass, atomic energy, electron tube and other industries |
Cerium Oxide - Risk and Safety
| Risk Codes | R36 - Irritating to the eyes R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24/25 - Avoid contact with skin and eyes. S23 - Do not breathe vapour. |
| WGK Germany | 3 |
| RTECS | FK6310000 |
| TSCA | Yes |
| HS Code | 28461000 |
| Hazard Class | 8 |
| Toxicity | LD50 orally in rats: >5.0 g/kg (Lambert) |
Cerium Oxide - Upstream Downstream Industry
| Raw Materials | Rare earth oxides |
Cerium Oxide - Nature
Open Data Verified Data
cerium oxide (Ce2 03) and cerium oxide were common. There is a considerable amount of oxide phase between cerium oxide and cerium oxide, which is unstable. Ceria is the most important and representative oxide of cerium. Has a fluorite structure. Pure product is
White heavy powder or cubic crystal, not pure products because containing trace lanthanum, praseodymium, etc. for light yellow or even pink to red-brown. Melting point 2600 °c. Insoluble in water. Difficult to dissolve in sulfuric acid, nitric acid. Practically insoluble in water and acid. The relative density was 7. 132. Toxic. Cerium trioxide has the hexagonal structure of the rare earth sesquioxide. Melting point 2210 ° C; Boiling point 3730 ° C, mainly used as a catalyst.
Last Update：2024-01-02 23:10:35
Cerium Oxide - Preparation Method
Open Data Verified Data
with cerium chloride or cerium nitrate as raw material, with ammonia to adjust the pH value of 2, adding oxalic acid to precipitate Cerium oxalate, after heating maturation, separation, washing, drying at 110 ℃, further, it was burned at 900 to 1000 ° C. To form cerium oxide. Cerium trioxide is obtained by heating a mixture of cerium dioxide and carbon powder at a temperature of 1250 ° C. In an atmosphere of carbon monoxide.
Last Update：2022-01-01 09:06:42
Cerium Oxide - Introduction
Insoluble in water and alkali, soluble in hydrochloric acid and sulfuric acid.
Last Update：2022-10-16 17:13:10
Cerium Oxide - Use
Open Data Verified Data
cerium oxide is mainly used as a lens polishing agent, and rare earth cerium polishing powder is widely used for polishing of cameras, camera lenses, television picture tubes, ophthalmic lenses, and the like. It can also be used in the glass industry, cerium oxide and titanium dioxide are used in combination to make the glass yellow. Cerium oxide for glass decolorization has the advantages of stable high temperature performance, low price and no visible light absorption. In addition, the addition of cerium oxide to glass for buildings and automobiles can reduce the transmittance of ultraviolet light. For the production of rare earth luminescent materials, CeO2 is added as an activator in the rare earth three primary color fluorescent powder of the luminescent material of the energy-saving lamp and the fluorescent powder used in the indicator lamp and the radiation detector. Cerium oxide is also a raw material for preparing each metal cerium. In addition, it is widely used in semiconductor materials, high-grade pigments, sensitizers for photosensitive glass, and cleaners for automobile exhaust.
Last Update：2022-01-01 09:06:43
Cerium Oxide - Safety
Open Data Verified Data
rat oral LDso:> 5.0g/kg. Inhalation of dust containing cerium is harmful to the lungs, with occupational pneumoconiosis. The maximum allowable concentration of cerium oxide is 5mg/m3. Staff should be protected. If the skin and eyes are touched, they should be immediately rinsed with flowing water. The working environment should have good ventilation conditions. The substance should be stored in a ventilated, dry place.
Last Update：2022-01-01 09:06:44
Cerium Oxide - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | for cerium oxide, it is easy to penetrate visible light, but it has good absorption for ultraviolet light and also makes skin look more natural. |
| toxicity | rare earth element salts can reduce the content of prothrombin, inactivate it, inhibit the production of thromboplastin, precipitate fibrinogen, and catalyze the decomposition of phosphate compounds. The toxicity of rare earth elements decreases with increasing atomic weight. Inhalation contains cerium dust, occupational pneumoconiosis, its chloride damage to the skin, can stimulate the mucous membrane of the eyes. Maximum allowable concentration: cerium oxide 5 mg/m3, cerium hydroxide 5 mg/m3. Anti-virus masks should be worn at work. Special protection should be carried out if there is radioactivity, and dust should be prevented from scattering. |
| use | used as an additive in the glass industry, as a plate glass grinding material, has been expanded to glass, optical lens, picture tube grinding, decolorization, clarification, absorption of ultraviolet rays of glass and electronic wires, etc. It is also used as an anti-reflection agent for glasses lenses. It is made of cerium titanium yellow with cerium to make the glass light yellow. Used in ceramic glaze and electronic industry as piezoelectric ceramic infiltration agent. It is also used to manufacture highly active catalysts, incandescent covers for gas lamps, and fluorescent screens for X-rays. used as analytical reagent, oxidant and catalyst used to prepare polishing powder and automobile exhaust catalyst used in glass, atomic energy, electronic tube and other industries high-efficiency catalyst, precision polishing, chemical additives, electronic ceramics, structural ceramics, ultraviolet collector, battery materials and so on. |
| production method | oxalic acid precipitation method uses cerium chloride or cerium nitrate solution as raw material, uses ammonia water to adjust the Ph value to 2, adds oxalic acid to precipitate cerium oxalate, is heated and cured, separated, washed, dried at 110 ℃, and then burned at 900~1000 ℃ to form cerium oxide. Its Ce2(C2O4)3 → 2CeO2 2CO2 4CO |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: > 5000 mg/kg; Abdominal cavity-mouse LD50: 465 mg/kg |
| flammability hazard characteristics | non-combustible |
| storage and transportation characteristics | warehouse low temperature ventilation and drying |
| fire extinguishing agent | water |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:55:45
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View History
Cerium Oxide
Ethyl 3-ethyl-1-methylpyrazole-5-carboxylate
Borane-pyridine
518304-32-0
Lithium Di-Fluoro(Oxalato) Borate
6-Aminocaproic acid
Strontium chloride
氯乙醛缩二甲醇
[1R-[1α(R*),2β,5α]]-5-methyl-2-(1-methylethyl)cyclohexyl lactate
三水合苯甲酸钙
Ethyl 3-ethyl-1-methylpyrazole-5-carboxylate
Borane-pyridine
518304-32-0
Lithium Di-Fluoro(Oxalato) Borate
6-Aminocaproic acid
Strontium chloride
氯乙醛缩二甲醇
[1R-[1α(R*),2β,5α]]-5-methyl-2-(1-methylethyl)cyclohexyl lactate
三水合苯甲酸钙
Raw Materials for Cerium Oxide