1314-61-0
Tantalum(V) oxide
CAS: 1314-61-0
Molecular Formula: O5Ta2
1314-61-0 - Names and Identifiers
| Name | Tantalum(V) oxide |
| Synonyms | Ta2-O5 TANTALUM OXIDE Tantalum(V)oxide Tantalum(V) oxide TANTALUM(V) OXIDE TANTALUM(+5)OXIDE TANTALUM PENTOXIDE Tantalum pentoxide Tantalum (V) oxide Tantalum penta oxide ditantalum pentaoxide Tantalum oxide (Ta2O5) Tantalic acid anhydride Tantalumoxidewhitepowder |
| CAS | 1314-61-0 |
| EINECS | 215-238-2 |
| InChI | InChI=1/5O.2Ta/rO5Ta2/c1-6(2)5-7(3)4 |
| InChIKey | PBCFLUZVCVVTBY-UHFFFAOYSA-N |
1314-61-0 - Physico-chemical Properties
| Molecular Formula | O5Ta2 |
| Molar Mass | 441.89 |
| Density | 8.2g/mLat 25°C(lit.) |
| Melting Point | 1872 °C |
| Water Solubility | Insoluble in water. |
| Appearance | lumps |
| Specific Gravity | 8.2 |
| Color | White to white-beige |
| Exposure Limit | OSHA: TWA 5 mg/m3NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3 |
| Merck | 14,9056 |
| Storage Condition | Sealed in dry,Room Temperature |
| Physical and Chemical Properties | Rhomboid columnar body. The relative density was 8.2. Melting point 1872 °c ± 10 °c. Soluble in molten potassium hydrogen sulfate and hydrofluoric acid, insoluble in water and other acids. |
1314-61-0 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | - |
| RTECS | WW5855000 |
| TSCA | Yes |
| HS Code | 28259085 |
| Toxicity | LD50 orally in rats: 8000 mg/kg (Cochran) |
1314-61-0 - Nature
Open Data Verified Data
rhomboid columnar body. The relative density was 8.2. Melting point 1872 °c ± 10 °c. Soluble in molten potassium hydrogen sulfate and hydrofluoric acid, insoluble in water and other acids.
Last Update：2024-01-02 23:10:35
1314-61-0 - Preparation Method
Open Data Verified Data
- potassium fluorotantalate method: the potassium fluorotantalate and sulfuric acid are heated to 400 ℃, the reactant is added water to boiling, and the acidified solution is hydrolyzed by sufficient dilution to form a hydrated oxide precipitate, after separation, washing and drying, tantalum pentoxide product was obtained.
- metal tantalum oxidation method: the metal tantalum is dissolved in nitric acid, hydrofluoric acid mixed acid, after extraction and purification, tantalum hydroxide is precipitated with ammonia water, and then washed with water, dried, burned and ground to obtain tantalum pentoxide finished product.
Last Update：2022-01-01 11:07:03
1314-61-0 - Use
Open Data Verified Data
for the preparation of lithium tantalate single crystal and the manufacture of high refraction low dispersion special optical glass, chemical can be used as a catalyst.
Last Update：2022-01-01 11:07:02
1314-61-0 - Safety
Open Data Verified Data
with double lid polyethylene plastic bottle packaging, each bottle of net weight 5kg, tightly sealed, the outer polyethylene plastic bag is placed in a hard box, filled with paper scraps, to prevent movement, each box of net weight 20kg. It shall be stored in a ventilated and dry place, and shall not be stacked in the open air. The packaging should be sealed. It is necessary to prevent rain and damage of packaging during transportation. When there is a fire, it can be suppressed by water, sand, and fire. Toxicity and protection: dust on the respiratory tract mucosa has a stimulating effect, long-term exposure to dust prone to pneumoconiosis. The maximum allowable concentration of tantalum oxide is 10mg/m3. In the environment with high dust content, it is necessary to wear anti-virus masks, to prevent the emission of oxide dust, grinding, packaging process should be mechanized, closed operation.
Last Update：2022-01-01 11:07:03
1314-61-0 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | tantalum oxide generally refers to tantalum pentoxide, also known as "tantalum anhydride", white orthorhombic crystals. Its chemical nature is more stable, resistant to general acid and alkali, heating will not be hydrogen chloride or hydrogen bromide erosion. Co-melting with alkali metal hydroxides or carbonates yields the corresponding insoluble tantalates, which are hydrolyzed by washing with water to form a precipitate of hydrated tantalum pentoxide. |
| Application | tantalum oxide can be used to prepare tantalum metal, optical glass, electronic equipment and tantalum carbide intermediates, it can be used for drawing lithium tantalate single crystal and manufacturing special optical glass with high refraction and low dispersion, and can be used as catalyst in chemical industry. |
| structural properties | tantalum oxide is a diamond-shaped columnar body that remains White at 1000-1200 °c, A further increase in temperature turned gray. Two variants are known: α-ta2o5 (high-temperature type) and β-Ta2O5 (low-temperature type), and the temperature for the transition from the β-type to the α-type is 1360±5 °c. The α-form has a melting point of 1872±10 °c and a relative density of 8.37; The β-form has a melting point of 1785±30 °c and a relative density of 8.18. Β-ta2o5. It has been converted to amorphous binary pentoxide prior to melting, and the amorphous body has a relative density of 7.3. |
| preparation | Step 1: high purity tantalum solution is prepared from impurity tantalum solution material by liquid-liquid extraction method, the tantalum liquid was first driven into a neutralization precipitation tank, and NH3 gas was passed through with stirring to make the solution PH = 8-9 to produce a precipitate of Ta(OH)5, which was then filtered through a filter press or vacuum. Then the tantalum hydroxide is put into the decomposition tank again, hydrofluoric acid and sulfuric acid are added to dissolve, and the high-purity tantalum liquid is obtained by secondary extraction with organic matter; Step 2, ammonia-neutralizing the high-purity tantalum liquid to PH>9, tantalum hydroxide is generated; Step 3, Ta(OH)5 is then transferred to a vacuum filtration water washing tank, washed and filtered with pure water until the filtrate contains F<0.02g/L, after passing the washing, it is transferred to the drying oven for drying; Step 4. The high purity tantalum hydroxide after drying is calcined in stages according to the following steps:(1) the temperature is raised to 200 ° C. For 2 hours;(2) then the temperature is raised to 500 ℃ for 5 hours;(3) the temperature is raised to 650 ℃ for 2 hours;(4) the temperature is raised to 800 ℃ for 4 hours;(5) after cooling to 200 degrees Celsius, it is released and sieved to obtain high purity tantalum pentoxide. |
| toxicity | dust has a stimulating effect on respiratory mucosa, and long-term exposure to dust is prone to pneumoconiosis. The maximum allowable concentration of tantalum oxide is 10 mg/m3. In the environment with high dust content, it is necessary to wear anti-virus masks, to prevent the emission of oxide dust, grinding, packaging process should be mechanized, closed operation. |
| production method | potassium fluorotantalate method potassium fluorotantalate and sulfuric acid were heated to 400 °c, and water was added to boiling, after sufficient dilution, the acidified solution is hydrolyzed to form a hydrated oxide precipitate, which is separated, washed and dried to obtain a finished tantalum pentoxide product. Its 2K 2taf7 2H2SO4 5H2O → Ta2O5 2K 2so4 14HF tantalum metal oxidation method dissolve metal tantalum in nitric acid, hydrofluoric acid mixed acid, after extraction and purification, precipitate tantalum hydroxide with ammonia, then wash with water, dry, burn, grind, tantalum pentoxide was obtained as a finished product. 3Ta 5HNO3 21HF → 3H2TaF7 5NO 10H2OH2TaF7 7NH4OH → Ta(OH)5 7NH4F 2 H2O2Ta(OH)5 → Ta2O5 5H2O |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 8000 mg/kg; Oral-mouse LD50: 4000 mg/kg |
| flammability hazard characteristics | non-combustible; |
| storage and transportation characteristics | 1. 2. Avoid dust. |
| fire extinguishing agent | water, carbon dioxide; Sand; Foam |
| Occupational Standard | TWA 5 mg/m3 |
Last Update：2024-04-10 22:29:15
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