THORIUM NITRATE HYDRATE
thorium nitrate hydrate
CAS: 13823-29-5
Molecular Formula: N4O12Th
THORIUM NITRATE HYDRATE - Names and Identifiers
| Name | thorium nitrate hydrate |
| Synonyms | THORIUM NITRATE THORIUM (IV) NITRATE Thorium tetranitrate thorium nitrate hydrate THORIUM NITRATE HYDRATE Thorium(4+) tetranitrate nitricacid,thorium(4+)salt THORIUM(IV) NITRATE HYDRATE THORIUM TETRANITRATE(Hydrate form) |
| CAS | 13823-29-5 |
| EINECS | 237-514-1 |
| InChI | InChI=1/4NO3.2Th/c4*2-1(3)4;;/q4*-1;2*+2 |
THORIUM NITRATE HYDRATE - Physico-chemical Properties
| Molecular Formula | N4O12Th |
| Molar Mass | 480.06 |
| Melting Point | decomposes at 500℃ [CRC10] |
| Water Solubility | g/100g H2O: 186 (0°C), 187 (10°C), 191 (20°C) [LAN05]; additional solubility data are in [SIE94] |
| Merck | 13,9454 |
| Stability | Stable. Deliquescent. Weakly radioactive (radioactivity 3300 Bq/g). Incompatible with reducing agents. |
THORIUM NITRATE HYDRATE - Risk and Safety
| Risk Codes | R8 - Contact with combustible material may cause fire R22 - Harmful if swallowed R33 - Danger of cumulative effects R36/37/38 - Irritating to eyes, respiratory system and skin. R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | 2915 |
| RTECS | XO6825000 |
| Hazard Class | 7 |
THORIUM NITRATE HYDRATE - Nature
Open Data Verified Data
colorless or white hexagonal plate-like crystals. Hygroscopic. Soluble in water and organic solvents. The aqueous solution was acidic. The anhydrate decomposes to thorium dioxide at 500 °c. General Industrial products contain about 48% ~ 50% thorium dioxide, white sucrose-like.
Last Update：2024-01-02 23:10:35
THORIUM NITRATE HYDRATE - Preparation Method
Open Data Verified Data
monazite alkali dissolution cake nitric acid method: monazite concentrate and 50% sodium hydroxide decomposition reaction at 140 ℃ for 5H, alkali: Ore is 1.3 (mass ratio), then dilute the reactants with hot water, and at 70 deg C insulation aging, the separation of monazite alkali soluble cake. The alkali-soluble cake was completely dissolved with nitric acid, and uranium and thorium were extracted with 30% tributyl phosphate (TBP). The aqueous phase was rare earth nitrate solution, which could be used to extract rare earth. Uranium and thorium enter the organic phase and are extracted with pure water to obtain uranium and thorium reverse extraction solution. After concentration, uranium is extracted with 6% tributyl phosphate and thorium is extracted with 40% TBP kerosene solution, after back extraction, concentration and crystallization, thorium nitrate was obtained.
Last Update：2022-01-01 11:07:07
THORIUM NITRATE HYDRATE - Use
Open Data Verified Data
It is used in a large amount for the production of xenon lamp covers (1% of cerium salt is required to be added), and is a raw material for the preparation of various thorium compounds. Such as the manufacture of thorium dioxide, thorium metal; And used in electric vacuum, synthetic chemistry, refractory materials and so on.
Last Update：2022-01-01 11:07:06
THORIUM NITRATE HYDRATE - Safety
Open Data Verified Data
with two layers of polyethylene plastic bag vacuum heat press sealing, outer aluminum barrel, export product plus barrel, each net weight 50kg. It is a radioactive substance. Risk code: GB Class 7 71003, UN N0.2976, IMDG code Class 7. According to the provisions of radioactive materials storage. Toxicity and protection: radioactive substances mainly through breathing air, drinking water, food and skin wounds into the body caused by internal irradiation. Production sites in the air of uranium, thorium, radium dust, through the respiratory tract into the human body, but also through the digestive tract or damaged skin into the human body, resulting in internal irradiation to the human body. The maximum allowable concentration of uranium and thorium dust is 0. 02mg/m3, and the surface pollution levels of equipment, walls and ground in places with daily intake of soluble natural uranium shall be in accordance with China's "Radiological Protection Regulations. The surface of the ground and equipment contaminated by natural uranium and thorium in the production of rare earth should be washed with water, and the surface of the hand and human body and the labor protection products can be washed with ordinary soap and washing powder. In combination with the stronger surface contamination, it can be cleaned with soap and detergent, and then cleaned with special detergent. Production personnel should wear masks, protective gloves and full-body protective equipment such as work clothes, caps, shoes, aprons, sleeves, goggles, etc.
Last Update：2022-01-01 11:07:07
THORIUM NITRATE HYDRATE - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| production method | monazite alkali-dissolving cake nitric acid method: the decomposition reaction of monazite concentrate with 50% sodium hydroxide at 140 ℃ for 5H, the alkali: Ore was 1.3 (mass ratio), and the reactant was diluted with hot water and incubated at 70 ° C. For aging to separate the monazite alkali-soluble cake. The alkali-soluble cake was completely dissolved with nitric acid, and uranium and thorium were extracted with 30% tributyl phosphate (TBP). The aqueous phase was rare earth nitrate solution, which could be used to extract rare earth. Uranium and thorium enter the organic phase and are extracted with pure water to obtain uranium and thorium reverse extraction solution. After concentration, uranium is extracted with 6% tributyl phosphate and thorium is extracted with 40% TBP kerosene solution, after back extraction, concentration and crystallization, thorium nitrate was obtained. The reaction formula is as follows: |
| category | radioactive material |
| toxicity grade | poisoning |
| Acute toxicity | oral-mouse LD50: 1760 mg/kg |
| flammability hazard characteristics | flammable in case of organic matter; High temperature decomposition |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from flammable materials, combustible materials and dangerous goods |
| fire extinguishing agent | Sand, carbon dioxide, water mist, foam |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:07
