Nsc154396
potassium heptafluorotantalate(V)
CAS: 16924-00-8
Molecular Formula: F7K2Ta
Nsc154396 - Names and Identifiers
Nsc154396 - Physico-chemical Properties
| Molecular Formula | F7K2Ta |
| Molar Mass | 392.13 |
| Density | 4.56g/mLat 25°C(lit.) |
| Melting Point | °Cd ec.) |
| Water Solubility | Decomposes in water. Slightly soluble in hydrogen fluoride. |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | Powder |
| Specific Gravity | 4.56 |
| Physical and Chemical Properties | Characteristics of colorless orthorhombic crystal system, usually white needle-like crystals. melting point 520 ℃ relative density 4.56 solubility slightly soluble in cold water, hydrofluoric acid, soluble in hot water. |
| Use | For tantalum metal and other Tantalum Compounds |
Nsc154396 - Risk and Safety
| Risk Codes | 23/25 - Toxic by inhalation and if swallowed. |
| Safety Description | 45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3288 6.1/PG 3 |
| WGK Germany | 1 |
| RTECS | TT1225000 |
| TSCA | Yes |
| HS Code | 28269090 |
| Hazard Note | Irritant |
| Hazard Class | 6.1 |
| Packing Group | III |
Nsc154396 - Nature
Open Data Verified Data
A colorless orthorhombic system, usually a white needle-like crystal. The heat is not decomposed, and the relative density is 4. 56. Melting point 520 °c. Micro-soluble in cold water, hydrofluoric acid, soluble in hot water. Toxic.
Last Update：2025-06-10 22:55:16
Nsc154396 - Preparation Method
Open Data Verified Data
acid leaching method: the tantalum niobium ore is crushed, slowly added into the acid leaching tank containing the mixture of hot concentrated hydrofluoric acid and sulfuric acid, the mineral powder is decomposed, and the resulting solution is decanted or filtered, after adjusting the acidity, liquid-liquid extraction separation, extraction phase with methyl isobutyl ketone (MIBK), according to the different acidity of niobium, tantalum fluoride separation, tantalum fluoride and potassium hydroxide reaction to produce potassium fluoride, after cooling crystallization and centrifugal separation, the product of potassium fluorotantalate was obtained.
Last Update：2022-01-01 11:07:05
Nsc154396 - Application
Open Data Verified Data
used to make tantalum metal and other Tantalum Compounds. Also used as a catalyst, reagent.
Last Update：2025-08-19 16:24:40
Nsc154396 - Safety
Open Data Verified Data
packed in an iron drum lined with a polyethylene plastic bag with a net weight of 50kg per drum. The packaging is sealed. Store in a cool, ventilated warehouse. Keep away from fire and heat source. Protection from direct sunlight. It should be stored separately from oxidants and acids, and mixed storage should not be avoided. Storage area should be appropriate for each material containing leakage. Before transportation, it is necessary to check whether the packaging container is complete and sealed, and ensure that the container does not leak, collapse, fall or damage during transportation. It is strictly prohibited to mix with acids, oxidants, food and food additives. Transport vehicles shall be equipped with emergency treatment for leakage during transportation. During transport should be protected against exposure to sunlight, rain, and high temperature. Road transport should follow the prescribed route, do not stay in residential areas and densely populated areas. It is an inorganic drug, and the classification and marking of commonly used Hazardous Chemicals (GB 13690-92) classifies the substance as category 6.1 toxic products. It cannot burn itself. Heat decomposition releases highly toxic smoke. The toxic products produced are potassium oxide and fluoride. Fire-fighting personnel must wear full-body fire-fighting and anti-virus clothing when extinguishing a fire. Move the container from the fire scene to the open space as far as possible when extinguishing the fire. Then, according to the cause of fire, select the appropriate fire extinguishing agent such as water, sand and fire extinguishing. Operation should be closed operation, partial ventilation. Prevent the release of dust into the air of the workshop. Operators must be specially trained and strictly follow the operating procedures. It is recommended that operators wear self-priming filter type dust masks, chemical safety glasses, anti-virus penetration work clothes and rubber gloves. Dust should be avoided. Avoid contact with oxidants and acids. Emergency treatment equipment for leakage shall be provided. Harmful substances may remain in the empty container. Toxicity and protection; The powder has a stimulating effect on the respiratory mucosa, long-term exposure to dust prone to pneumoconiosis. The maximum allowable concentration is 10 mg/m3 based on tantalum and its oxides, and the fluorine-containing compound of tantalum shall be calculated based on fluorine, that is, 1mg/m3. Once in contact with the skin, rinse with running water. In case of accidental inhalation, the patient should be separated from the site to a place with fresh air. Keep airway unobstructed. Such as Dyspnea, to the delivery of oxygen. If breathing stops, perform artificial respiration immediately. The patient visited hospital. Eye contact, lift the eyelids, rinse with running water or saline. The patient visited hospital.
Last Update：2025-06-10 22:55:16
Nsc154396 - Reference Information
| LogP | -1 at 20℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | its powder has a stimulating effect on the mucous membrane of the respiratory tract, and it is susceptible to Pneumoconiosis due to long-term exposure to dust. The maximum allowable concentration is 10 mg/m3 based on tantalum and its oxides, and the fluorine-containing compound of tantalum shall be calculated based on fluorine, that is, l mg/m. When working in an environment with high dust content, wear anti-virus masks to prevent dust emission of oxides, chlorides and fluorides. The processes of grinding, screening and packaging of concentrate should be mechanized and closed. |
| Application | is used to make metal tantalum and other Tantalum Compounds. Also used as a catalyst, reagent. for electrochemical synthesis of TaB2 |
| production method | after the tantalum-niobium ore is crushed by acid leaching, it is slowly added into an acid leaching tank containing a mixture of hot concentrated hydrofluoric acid and sulfuric acid, the mineral powder is decomposed, and the resulting solution is decanted or filtered and the acidity is adjusted, followed by liquid-liquid extraction separation. The extraction phase is methyl isobutyl ketone (MIBK), tantalum fluoride separation, tantalum fluoride and potassium hydroxide reaction to produce potassium fluorotantalate, then by cooling crystallization, centrifugal separation, produced potassium fluorotantalate products. Its 2HF tap5 2KOH → K2TaF7 2H2O |
| category | toxic substances |
| toxicity classification | medium |
| Acute toxicity | intraperitoneal-rat LD50: 375 mg/kg; Oral-mouse LD50: 110 mg/kg |
| flammability hazard characteristics | non-combustible; Thermally decomposed toxic gases |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from acid and food additives |
| Occupational Standard | 2.5 mg (fluorine)/m3 |
| 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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Spot supply
Product Name: potassium heptafluorotantalate(V) Request for quotationCAS: 16924-00-8
Tel: 021-60556179
Email: 18721521379@163.com
Mobile: +86-18721521379
Wechat: 18721521379
Spot supply
Product Name: potassium heptafluorotantalate(V) Request for quotationCAS: 16924-00-8
Tel: +86-13776910623
Email: r@reformchem.com
Mobile: +86-13776910623
QQ: 3785839865
Wechat: chemical6666
Spot supply
Product Name: Potassium heptafluorotantalate Visit Supplier Webpage Request for quotationCAS: 16924-00-8
Tel: 400-968-2212
Email: 3623107365@qq.com
Mobile: 18916960931
QQ: 3623107365
Wechat: 18916960931
Spot supply
Product Name: Potassium heptafluorotantalate(V) Visit Supplier Webpage Request for quotationCAS: 16924-00-8
Tel: +86-400-900-4166
Email: product@acmec-e.com
Mobile: +86-18621343501
QQ: 2881950922
Wechat: 18621343501
WhatsApp: +86-18621343501
View History
Nsc154396
丙泊酚
Benzildimethyl ketal
BETA-(4-MORPHOLINO)PROPIOPHENONE HYDROCHLORIDE
CIS-OLEIC ACID METHYL ESTER
tri nonyl phenyl phosphite
diethyl oxalacetate
4-Nitrophenylethanal
毛茶碱
LCZ696中间体3
丙泊酚
Benzildimethyl ketal
BETA-(4-MORPHOLINO)PROPIOPHENONE HYDROCHLORIDE
CIS-OLEIC ACID METHYL ESTER
tri nonyl phenyl phosphite
diethyl oxalacetate
4-Nitrophenylethanal
毛茶碱
LCZ696中间体3