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Basic Information
CAS No.: 17523-77-2
Name: niobium(V) potassium oxyfluoride
Molecular Structure:
Molecular Structure of 17523-77-2 (niobium(V) potassium oxyfluoride)
Formula: F5NbO•2K
Molecular Weight: 282.11
Hazard Symbols: Toxic by ingestion, strong irritant. TLV: 2.5 mg(F)/m3.
Safety: Poison by ingestion. When heated to decomposition it emits toxic fumes of F− and K2O. See also FLUORIDES and NIOBIUM.
PSA: 9.23000
LogP: 0.77200
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Chemistry

Molecular Formula: F5NbO2K 
Structure of Potassium oxotetrafluoroniobate(V) (CAS NO.17523-77-2):

Toxicity Data With Reference

1.    

orl-mus LD50:130 mg/kg

     HYSAAV    Hygiene and Sanitation: English Translation of Gigiena Sanitariya. 32 (1967),343.

Safety Profile

RIDADR: 2923
HazardClass: 8
PackingGroup: II
Poison by ingestion. When heated to decomposition it emits toxic fumes of F− and K2O. See also FLUORIDES and NIOBIUM.

Standards and Recommendations

OSHA PEL: TWA 2.5 mg(F)/m3
ACGIH TLV: TWA 2.5 mg(F)/m3; BEI: 3 mg/g creatinine of fluorides in urine prior to shift; 10 mg/g creatinine of fluorides in urine at end of shift.
NIOSH REL: TWA 2.5 mg(F)/m3

Specification

  Potassium oxotetrafluoroniobate(V) , its cas register number is 17523-77-2. It also can be called Columbium potassium fluoride ; Dipotassium pentafluorooxoniobate ; Niobium potassium fluoride ; Potassium fluoniobate(V) (K2NbOF2) (6CI) ; 
 Potassium hydroxyfluoroniobate .