Basic information
- CAS
16924-00-8- Standard SMILES
[F][Ta-2]([F])([F])([F])([F])([F])[F].[K+].[K+]- InChIKey
DPXAUKPQZOAHGF-UHFFFAOYSA-G- Molecular formula
- F7K2Ta
- Average molar mass
- 392.133 g/mol
- Monoisotopic mass
- 391.86423
Names & identifiers
- Preferred name
- Potassium fluorotantalate
- IUPAC
- dipotassium;heptafluorotantalum(2-)
- English name
- Potassium heptafluorotantalate(V)
- Molecular formula
- F7K2Ta
- Molecular weight
- 392.13
Names & synonyms
16924-00-8Potassium tantalum fluorideDipotassium heptafluorotantalateTantalum potassium fluoridePotassium fluotantalatePOTASSIUM FLUOROTANTALATEHSDB 5063Tantalate(2-), heptafluoro-, dipotassiumEINECS 240-986-1Potassium fluorotanatalate (K2TaF7)Potassium tantalum fluoride (K2TaF5)Potassium tantalum fluoride (K2TaF7)
Show more names
POTASSIUM HEPTAFLUOROTANTALATENsc154396potassium flutantalatepotassiumfluotantalateheptafluorotantalum(2-)Potassium fluoromntalatepotassiumfluorotantalateDikaliumheptafluorotantalat
NSC 154396Tantalate(2-), heptafluro-, dipotassiumDipotassium heptafluorotantalate (K2TaF7)DTXSID00884943EC 240-986-1Tantalate(2-), heptafluoro-, potassium (1:2)POTASSIUM TANTALUM FLUORIDE [K2TAF5]POTASSIUM TANTALUM FLUORIDE [K2TAF7]
Database identifiers
- CAS
16924-00-8
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 8
- Rotatable bonds
- 0
- Heavy atoms
- 10
- Formal charge
- 0
- Complexity
- 96.6
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
Density5.24
Color/FormWHITE, SILKY NEEDLES
SolubilityAPPROX 5 G/L @ 0 °C; 600 G/L @ 100 °C
Melting Point720 +/- 10 °C
Physical Description
Large Crystals
White solid; [Hawley] White powder; [MSDSonline]
Physicochemical properties
- Melting point
- °Cd ec.)
- Density
- 4.56 g/mL · 4.56 g/mL at 25 °C(lit.)
- vapor pressure
- 0 Pa · 0Pa at 20℃
- form
- Powder
- Specific Gravity
- 4.56 · 4.56
- color
- colorless crystals, crystalline
- Water Solubility
- Decomposes in water. Slightly soluble in hydrogen fluoride.
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
Danger
H301 (97.8%): Toxic if swallowed [Danger Acute toxicity, oral]
P261, P264, P264+P265, P270, P271, P280, P301+P316, P302+P352, P304+P340, P305+P351+P338, P316, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 46 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Regulatory Information
Tantalate(2-), heptafluoro-, potassium (1:2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Tantalate(2-), heptafluoro-, potassium (1:2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
REACH registered substance: Dipotassium heptafluorotantalate (EC: 240-986-1)
Hazards SummaryAn irritant; Effects in high-dose animal studies include convulsions; [MSDSonline] See FLUORIDES. See Tantalum, metal and tantalum oxide, dust.
Hazard Classes and CategoriesAcute Tox. 3 (97.8%)
Safety & protection
Exposure Control and Personal Protection
Biological Exposure Indices (BEI) [ACGIH] - Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)
1.0 [mg/m3], inhalable fraction, as F[German Research Foundation (DFG)]
Chemistry & industry
Pharmacology
Absorption, Distribution and Excretion
IN RATS ABSORPTION OF SOLUBLE TANTALUM SALTS IS RELATIVELY LOW. /SOL TANTALUM SALTS/
SOL POTASSIUM TANTALATE (8 MG) MIXED INTO NACL...INTRODUCED BY STOMACH TUBE INTO RATS; (182)TA...ELIMINATED IN FECES IN 3 PHASES: RAPID EXCRETION OF UNABSORBED TANTALATE, SLOW ELIMINATION OF LOOSELY BOUND TANTALUM IN TISSUES, & 3-4 DAY ELIMINATION OF MIN QUANTITIES OF TIGHTLY BOUND TANTALUM. /POTASSIUM TANTALATE/
RETENTION OF TA IN TISSUES IS MORE PROLONGED THAN THE OTHER METALS OF GROUP V, IN FOLLOWING ORDER: BONES GREATER THAN GI TRACT GREATER THAN PELT GREATER THAN MUSCLE GREATER THAN LIVER GREATER THAN KIDNEYS GREATER THAN TESTES GREATER THAN SPLEEN. TANTALUM HELD IN BONES ACCOUNTS FOR 40% OF BODY CONTENT. /TANTALUM SALTS/
Uses & manufacturing
Uses
Used as intermediate for making pure tantalum; [Hawley]
CHEMICAL INTERMEDIATE FOR PURE TANTALUM
U.S. Exports
(1977) No Data
(1979) No Data
U.S. Imports
(1977) No Data
(1979) 5.19X10+7 GRAMS
U.S. Production
2023: 1,000,000 - <5,000,000 lb
(1977) No Data
(1979) No Data
Industry UsesIntermediate
Methods of ManufacturingADDITION OF POTASSIUM FLUORIDE TO A SOLUTION OF TANTALUM FLUORIDE IN THE PRESENCE OF EXCESS HYDROFLUORIC ACID
General Manufacturing Information
Primary Metal Manufacturing
Tantalate(2-), heptafluoro-, potassium (1:2): ACTIVE
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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