cericdisulfate
cerium(4+) disulphate
CAS: 13590-82-4
Molecular Formula: CeH2O4S
cericdisulfate - Names and Identifiers
| Name | cerium(4+) disulphate |
| Synonyms | Cerous sulfate cericdisulfate ceriumsulphate Ceric disulfate ceriumdisulfate Cerium disulfate Cerium(IV)sulfate Cerium(4+) sulfate Cerium(IV) sulfate cerium(4+) disulphate Cericsulfate,anhydrous TETRASULFATO-CERIC ACID |
| CAS | 13590-82-4 |
| EINECS | 237-029-5 |
| InChI | InChI=1/Ce.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+4;/p-2 |
cericdisulfate - Physico-chemical Properties
| Molecular Formula | CeH2O4S |
| Molar Mass | 238.19 |
| Density | 3.01g/mLat 25°C(lit.) |
| Boling Point | 330℃ at 760mmHg |
| Water Solubility | Soluble in water and dilute sulfuric acid. |
| Vapor Presure | 0.001Pa at 20℃ |
| Appearance | Yellow powder |
| Color | Light yellow |
| Merck | 14,1990 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Sensitive | Hygroscopic |
| MDL | MFCD00148852 |
| Physical and Chemical Properties | Anhydrous cerium sulfate is a yellow crystalline powder. Heating dehydration, 180~200 deg C into anhydrous salt. 350 degrees above the decomposition, the formation of cerium sulfate. Soluble in cold water and hot acid, in hot water decomposition of basic salts. |
| Use | calibrated against sodium oxalate, traceable to NIST SRM |
cericdisulfate - Risk and Safety
| Risk Codes | R8 - Contact with combustible material may cause fire R36/38 - Irritating to eyes and skin. R36/37/38 - Irritating to eyes, respiratory system and skin. R35 - Causes severe burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S17 - Keep away from combustible material. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 2796 8/PG 2 |
| WGK Germany | 3 |
| RTECS | WS6960000 |
| TSCA | Yes |
| Hazard Class | 5.1 |
| Packing Group | III |
cericdisulfate - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | anhydrous cerium sulfate is used as a high purity product in the electronics industry and also used as a radiation meter manufacturing. Used as oxidant in analytical chemistry and industry. It is also used to make waterproofing agent and antifungal agent. |
| operation process | 200g of cerium ammonium nitrate [(NH4)2Ce(NO3)6] is dissolved in hot water at 70~80 ℃ in the 1000mL. After dissolution, filter, add 250mL of concentrated ammonia to the filtrate for alkaline hydrolysis until cerium hydroxide is completely precipitated. Suction and filtration, wash with hot water until NO3-free (tested with indigo) to obtain cerium hydroxide. 132mL 49% sulfuric acid is added to the cerium hydroxide prepared above under stirring, and heated on a water bath, the reaction is complete, filtration, and the filtrate is evaporated on the water bath to form a crystalline film. Cooling, suction filtration, crystallization with cold water wash 3~4 times, and then put in a glass dish at 25~30 DEG C to dry, get reagent pure cerium sulfate. 3. A preparation method of electronic-grade high cerium sulfate 3.1 adding 1 part of cerium carbonate into 2-5 parts of dilute nitric acid solution, stirring for 1-2 hours to obtain cerium nitrate solution; 3.2 adding an ammonium carbonate aqueous solution with a concentration of 1-5mol/L to the cerium nitrate solution obtained in step 1 until the pH of the cerium nitrate solution is 4.0-4.5, and then heating the cerium nitrate solution to 90-95°C, keep the temperature for 90-150 minutes until the mass concentration of cerium nitrate solution is 220-240g/L; 3.3 filtration, the mixed solution obtained in step 2 is filtered through a 1000 mesh sieve to obtain filtrate; 3.4, the filtrate obtained in step 3 is added to the microporous filter for filtration to obtain filtrate; 3.5, hydrogen peroxide with a volume concentration of 30% is added to the filtrate obtained in step 4, and then ammonia aqueous solution is added dropwise to the filtrate, until the pH of the filtrate is 6.0~7.0, control the reaction temperature at 30~35 ℃, stir for 2~10 minutes, and then raise the temperature at 90~95 ℃ for 30min;3.6, add a proper amount of pure water to the container containing the mixed solution of step 5 and wash it for 1~5 times, and add all the flushing solution to the plate and frame to the precipitate; 3.7, add the cerium hydroxide filter cake to the excess concentrated sulfuric acid to dissolve it; 3.8, concentrated sulfuric acid is added to the solution, concentrated and reacted for 5 hours, and then filtered to obtain high cerium sulfate crystals; 3.9 dehydrate high cerium sulfate crystals to obtain electronic grade high cerium sulfate. This method has short filtration time and high yield; high product oxidation rate; high product purity; high product fineness and low non-rare earth metal impurities. 4. Synthesis of cerium ammonium nitrate and ammonia water to prepare cerium hydroxide for generation solution, reaction with dilute sulfuric acid to synthesize high cerium sulfate 4.1 to prepare cerium hydroxide, dissolve cerium ammonium nitrate in distilled water at a temperature of 75 ℃ ~ 85 ℃, continuously stirring, adding ammonia water to the filtrate for alkaline hydrolysis, until cerium hydroxide is completely dissolved, drained, washed with hot distilled water 80 ℃ ~ 90 ℃, washed 5~6 times until NO3 is free, and then drained to obtain cerium hydroxide solution; 4.2 synthesis of superior-grade pure cerium sulfate 125ml of analytically pure dilute sulfuric acid is added to the above step 1 under stirring to obtain cerium hydroxide solution, and is heated on water-soluble at 85 ℃ ~ 95 ℃, filtered, and the filtrate is evaporated on water-soluble To form a crystalline film, cool for 4-6 hours, crystallize, the crystallization is washed with distilled water for 5-6 times, then placed in a porcelain dish and dried at 25 ℃ ~ 30 ℃, and taken out to obtain superior-grade pure cerium sulfate. The preparation method obtains high cerium sulfate with high purity, low impurity content, simple process steps and high production efficiency. |
| Stability | Anhydrous cerium sulfate is sensitive to visible light and ultraviolet light; especially in dilute solutions. Therefore, the solution should be stored in a blackened bottle. The concentration of the stored solution should be 0.1-0.4N. At such a high concentration, if the solution is in a static state, the organic impurities will undergo oxidation, but if the content of the organic impurities in the reagent and water is sufficiently low, the solution can be stored for several months without significant deterioration. Because this dosimeter has a sense of light, care should be taken to avoid excessive light before, during and after irradiation. |
| high cerium sulfate | high cerium sulfate is a commonly used strong oxidant. Chemical formula Ce(SO4)2. Molecular weight 332.24. Dark yellow crystals. Relative density 3.91. Decomposition at 143 ℃. Its tetrahydrate is a yellow orthorhombic crystal with a 3.91 relative density. Dissolve in water to produce basic salt. It is a strong oxidant, which can oxidize Cr3 to CrO42-, making cotton fibers light red. When concentrated with alkali metal sulfate in a sulfated solution, sulfuric acid double salt can be obtained. Preparation method: Heat cerium dioxide and concentrated sulfuric acid together, or electrolyze the sulfated solution of cerium sulfate. Uses: It can be used as a strong oxidant, tracer and used in the photography industry. Its sulfuric acid double salt can be used as an important analytical reagent. |
| production method | 1. dissolve analytically pure cerium ammonium nitrate in hot water to make the content about 15%, filter out insoluble matter, add analytically pure ammonia water with density of 0.91 into filtrate until there is no more cerium hydroxide precipitation: after filtration, wash the precipitation several times with hot water, and stir the precipitation frequently until the washing water does not contain? NO 3-. Add a mixture of sulfuric acid and water with a density of 1.84 to the precipitate under constant stirring [sulfuric acid: water = 1: 1? (Volume)], heating in a water bath: When the cerium hydroxide is completely dissolved, stop heating, filter out the insoluble matter, evaporate and concentrate the filtrate until a large number of crystals appear, then cool, filter and wash with ice water for 3~4 times, After being drained, it is diluted, and dried to a non-stick glass rod at 25~30 ℃ to obtain analytically pure crystalline cerium sulfate. |
| category | toxic substances |
| flammability hazard characteristics | thermal decomposition spicy stimulation smoke |
| storage and transportation characteristics | warehouse low temperature ventilation and drying |
| fire extinguishing agent | water |
Last Update：2024-04-10 22:29:15
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