potassium heptafluoroniobate(V) | 16924-03-1

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 碱金属盐
• 英文名称: potassium heptafluoroniobate(V)
• 英文别名: potassium heptafluoroniobate；Potassium;heptafluoroniobium(2-)
• CAS: 16924-03-1
• 化学式: F₇Nb*2K
• 分子量: 304.092
• InChiKey: REJORZPTIZHXDV-UHFFFAOYSA-G

物化性质

• 熔点：
  735 °C
• 稳定性/保质期：
  常温常压下稳定，避免与水分、潮湿氧化物和酸接触。

计算性质

• 辛醇/水分配系数(LogP)：
  -0.06
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  8

安全信息

• TSCA：
  Yes
• 危险等级：
  6.1
• 危险品标志：
  Xi
• 危险类别码：
  R36/37/38
• 危险品运输编号：
  UN3288
• WGK Germany：
  3
• 包装等级：
  III
• 危险类别：
  6.1
• 安全说明：
  S26,S36
• 储存条件：
  常温密闭避光、通风干燥，在惰性气体环境下保存。

SDS

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SECTION 1: Identification of the substance/mixture and of the company/undertaking
Product identifiers
Product name : Potassium heptafluoroniobate(V)
REACH No. : A registration number is not available for this substance as the substance
or its uses are exempted from registration, the annual tonnage does not
require a registration or the registration is envisaged for a later
registration deadline.
CAS-No. : 16924-03-1
Relevant identified uses of the substance or mixture and uses advised against
Identified uses : Laboratory chemicals, Manufacture of substances

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SECTION 2: Hazards identification
Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008
Skin irritation (Category 2), H315
Eye irritation (Category 2), H319
Specific target organ toxicity - single exposure (Category 3), H335
For the full text of the H-Statements mentioned in this Section, see Section 16.
Classification according to EU Directives 67/548/EEC or 1999/45/EC
Xi Irritant R36/37/38
For the full text of the R-phrases mentioned in this Section, see Section 16.
Label elements
Labelling according Regulation (EC) No 1272/2008
Pictogram
Signal word Warning
Hazard statement(s)
H315 Causes skin irritation.
H319 Causes serious eye irritation.
H335 May cause respiratory irritation.
Precautionary statement(s)
P261 Avoid breathing dust/ fume/ gas/ mist/ vapours/ spray.
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove
contact lenses, if present and easy to do. Continue rinsing.
Supplemental Hazard none
Statements
Other hazards - none

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SECTION 3: Composition/information on ingredients
Substances
Formula : F7K2Nb
Molecular Weight : 304,09 g/mol
CAS-No. : 16924-03-1
EC-No. : 240-987-7
Hazardous ingredients according to Regulation (EC) No 1272/2008
Component Classification Concentration
Dipotassium heptafluoroniobate
Skin Irrit. 2; Eye Irrit. 2; STOT -
SE 3; H315, H319, H335
Hazardous ingredients according to Directive 1999/45/EC
Component Classification Concentration
Dipotassium heptafluoroniobate
Xi, R36/37/38 -
For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16

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SECTION 4: First aid measures
Description of first aid measures
General advice
Consult a physician. Show this safety data sheet to the doctor in attendance.
If inhaled
If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.
In case of skin contact
Wash off with soap and plenty of water. Consult a physician.
In case of eye contact
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
If swallowed
Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.
Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in
section 11
Indication of any immediate medical attention and special treatment needed
no data available

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SECTION 5: Firefighting measures
Extinguishing media
Suitable extinguishing media
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Hydrogen fluoride, Potassium oxides, niobium oxides
Advice for firefighters
Wear self contained breathing apparatus for fire fighting if necessary.
Further information
no data available

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SECTION 6: Accidental release measures
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure
adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust.
For personal protection see section 8.
Environmental precautions
Do not let product enter drains.
Methods and materials for containment and cleaning up
Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed
containers for disposal.
Reference to other sections
For disposal see section 13.

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SECTION 7: Handling and storage
Precautions for safe handling
Avoid contact with skin and eyes. Avoid formation of dust and aerosols.
Provide appropriate exhaust ventilation at places where dust is formed.Normal measures for preventive fire
protection.
For precautions see section 2.2.
Conditions for safe storage, including any incompatibilities
Store in cool place. Keep container tightly closed in a dry and well-ventilated place.
hygroscopic
Specific end use(s)
A part from the uses mentioned in section 1.2 no other specific uses are stipulated

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SECTION 8: Exposure controls/personal protection
Control parameters
Components with workplace control parameters
Exposure controls
Appropriate engineering controls
Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and
at the end of workday.
Personal protective equipment
Eye/face protection
Safety glasses with side-shields conforming to EN166 Use equipment for eye protection tested
and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection
Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique
(without touching glove's outer surface) to avoid skin contact with this product. Dispose of
contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and
the standard EN 374 derived from it.
Body Protection
impervious clothing, The type of protective equipment must be selected according to the
concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection
For nuisance exposures use type P95 (US) or type P1 (EU EN 143) particle respirator.For higher
level protection use type OV/AG/P99 (US) or type ABEK-P2 (EU EN 143) respirator cartridges.
Use respirators and components tested and approved under appropriate government standards
such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Do not let product enter drains.

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SECTION 9: Physical and chemical properties
Information on basic physical and chemical properties
a) Appearance Form: powder
b) Odour no data available
c) Odour Threshold no data available
d) pH no data available
e) Melting point/freezing no data available
point
f) Initial boiling point and no data available
boiling range
g) Flash point not applicable
h) Evapouration rate no data available
i) Flammability (solid, gas) no data available
j) Upper/lower no data available
flammability or
explosive limits
k) Vapour pressure no data available
l) Vapour density no data available
m) Relative density no data available
n) Water solubility no data available
o) Partition coefficient: n- no data available
octanol/water
p) Auto-ignition no data available
temperature
q) Decomposition no data available
temperature
r) Viscosity no data available
s) Explosive properties no data available
t) Oxidizing properties no data available
Other safety information
no data available

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SECTION 10: Stability and reactivity
Reactivity
no data available
Chemical stability
Stable under recommended storage conditions.
Possibility of hazardous reactions
no data available
Conditions to avoid
Avoid moisture.
Incompatible materials
Strong oxidizing agents
Hazardous decomposition products
Other decomposition products - no data available
In the event of fire: see section 5

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SECTION 11: Toxicological information
Information on toxicological effects
Acute toxicity
no data available
Skin corrosion/irritation
no data available
Serious eye damage/eye irritation
no data available
Respiratory or skin sensitisation
no data available
Germ cell mutagenicity
no data available
Carcinogenicity
IARC: No component of this product present at levels greater than or equal to 0.1% is identified as
probable, possible or confirmed human carcinogen by IARC.
Reproductive toxicity
no data available
Specific target organ toxicity - single exposure
Inhalation - May cause respiratory irritation.
Specific target organ toxicity - repeated exposure
no data available
Aspiration hazard
no data available
Additional Information
RTECS: Not available
To the best of our knowledge, the chemical, physical, and toxicological properties have not been
thoroughly investigated.

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SECTION 12: Ecological information
Toxicity
no data available
Persistence and degradability
no data available
Bioaccumulative potential
no data available
Mobility in soil
no data available
Results of PBT and vPvB assessment
PBT/vPvB assessment not available as chemical safety assessment not required/not conducted
Other adverse effects
no data available

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SECTION 13: Disposal considerations
Waste treatment methods
Product
Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed
professional waste disposal service to dispose of this material. Dissolve or mix the material with a
combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
Contaminated packaging
Dispose of as unused product.

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SECTION 14: Transport information
UN number
ADR/RID: - IMDG: - IATA: -
UN proper shipping name
ADR/RID: Not dangerous goods
IMDG: Not dangerous goods
IATA: Not dangerous goods
Transport hazard class(es)
ADR/RID: - IMDG: - IATA: -
Packaging group
ADR/RID: - IMDG: - IATA: -
Environmental hazards
ADR/RID: no IMDG Marine pollutant: no IATA: no
Special precautions for user
no data available

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SECTION 15 - REGULATORY INFORMATION
N/A

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SECTION 16 - ADDITIONAL INFORMATION
N/A

反应信息

• 作为反应物：
  描述：

  potassium heptafluoroniobate(V) 在 AlF₃ 作用下， 以 neat (no solvent) 为溶剂， 以85%的产率得到氟化铌(V)
  参考文献：
  名称：

  Beiträge zur chemie der elemente niob und tantal

  摘要：

  DOI：

  10.1016/0022-5088(65)90087-1
• 作为产物：
  描述：

  potassium niobium(V) oxide fluoride 以 氢氟酸 为溶剂， 生成 potassium heptafluoroniobate(V)
  参考文献：
  名称：

  Rammelsberg, C., Annalen der Physik, 1869, vol. 136, p. 352 - 372

  摘要：

  DOI：

文献信息

• Chemical preparation and X-ray structure determination of K0.30NbF3
  作者：R. Masse、S. Aléonard、M.T. Averbuch-Pouchot

  DOI：10.1016/0022-4596(84)90236-6

  日期：1984.6

  The preparation and crystal structure of K0.30NbF3 single crystals are described. The compound is orthorhombic with a = 7.540(3), b = 13.06(2), c = 7.750(3), Å, space group C2221. The structure refines to R = 0.044 with 455 reflections. The framework derives from the Magneli hexagonal tungsten bronze and is similar to the K0.25VF3 orthorhombic phase.

  描述了K 0.30 NbF 3单晶的制备和晶体结构。该化合物是正交晶体，a = 7.540（3），b = 13.06（2），c = 7.750（3），A，空间群C 222 1。结构经过455次反射后细化为R = 0.044。该框架衍生自Magneli六角形钨青铜，类似于K 0.25 VF 3正交晶相。
• The Influence of Oxide on the Electrodeposition of Niobium from Alkali Fluoride Melts
  作者：E. Christensen、Xindong Wang、J. H. von Barner、T. O̸stfold、N. J. Bjerrum

  DOI：10.1149/1.2054898

  日期：1994.5.1

  Electrodeposit of niobium metal from K[sub 2]NbF[sub 7]-LiF-NaF-KF-Na[sub 2]O melts at 700 C has been investigated. It was found that the equilibrium oxidation state of niobium was four for initial O[sup 2[minus]]/Nb(V) ratios of up to at least one. On the other hand when a niobium metal sheet was used for the reduction, average oxidation states close to five were obtained. Cyclic voltammetry showed

  已经研究了从 K[sub 2]NbF[sub 7]-LiF-NaF-KF-Na[sub 2]O 在 700°C 熔化时电沉积铌金属。发现对于高达至少 1 的初始 O[sup 2[minus]]/Nb(V) 比率，铌的平衡氧化态为 4。另一方面，当使用铌金属片进行还原时，获得接近五个的平均氧化态。循环伏安法显示 NbF[sup 2[minus]][sub 7] 分两步减少。提出了一种机制 Nb(V) [r 箭头] Nb(4) [r 箭头] Nb(0)。当存在氧化物时，由于铌单氧氟和二氧氟配合物的还原，分别在 [minus]0.6 和 [minus]0.74 V 处观察到新波。此外还进行了电镀实验。工作中的基材是低碳钢，阳极铌金属，电流密度约为 90 mA/cm[sup 2]。发现至少1摩尔百分比的氧化物的存在是获得高于30%的电流效率所必需的。获得的最高电流效率约为 95%。对于等于或高于 1
• Electrodeposition of niobium from fluoroniobate K2NbF7 solutions in fused NaCl-KCl
  作者：A. Barhoun、Y. Berghoute、F. Lantelme

  DOI：10.1016/0925-8388(92)90225-x

  日期：1992.2

  potentials lower than −0.7 V, a black powder was obtained. X-ray analysis indicated the presence of metallic niobium and of a new phase containing potassium and niobium. In solutions containing niobium(IV) a thin layer of niobium carbide formed spontaneously on carbon. Voltammetric investigations indicated that the formation of niobium carbide occurred before the metal deposition; the redox reaction corresponding

  摘要 采用伏安法和计时电位法研究了720 ℃熔融NaCl-KCl中氟铌酸盐溶液电沉积铌的机理。结果表明，该反应分两步进行：首先是可逆的氧化还原反应，Nb(V)+e↔Nb(IV)，然后是准可逆还原，Nb(IV)+4e→Nb(0)。氧化还原电对 Nb(V)/Nb(IV) 和 Nb(IV)/Nb(0) 的标准电位为 E 5 4 0 =0.394 V 和 E 4 0 0 = -0.178 V vs. Ni/Ni2+ 参考电极。两种电活性物质的扩散系数为 DNb(V)=1.83×10-5 cm2 s-1 和 DNb(IV)=2.34×10-5 cm2 s-1。在镍电极上，结晶良好的金属铌的电沉积发生在 -0.5 V vs. Ni/Ni2+ 的电位下。当使用铌 (IV) 的预还原溶液时，可实现更好的附着力和内聚力。在低于-0.7 V 的电位下，获得黑色粉末。X 射线分析表明存在金属铌和含有钾和铌的新相。在含有铌
• Phase Equilibria in the Molten System KF-K₂NbF₇-Nb₂O₅
  作者：B. Kubíková、Vladimír Daněk、Marcelle Gaune-Escard

  DOI：10.1524/zpch.2006.220.6.765

  日期：2006.6.1

  Phase equilibria in the molten system KF-K₂NbF₇-Nb₂O₅ were investigated up to 20mol% of Nb₂O₅ by thermal analysis and differential scanning calorimetry. In the binary and ternary systems oxofluoroniobate compounds are formed. They were evidenced by comparison of experimetal X-ray diffraction patterns with those in the international X-ray diffraction database (PDF-2). In the experimental compostion range the phase diagram of the molten KF-K₂NbF₇-Nb₂O₅ system consists of five crystallisation fields corresponding to KF, K₃NbF₈, K₂NbF₇, K₂NbO₃F and K₃NbOF₆.

  通过热分析和差示扫描量热法，研究了在Nb₂O₅的含量达到20mol%的熔融系统KF-K₂NbF₇-Nb₂O₅中的相平衡。在二元和三元体系中形成氧氟铌酸盐化合物。通过将实验X射线衍射图案与国际X射线衍射数据库（PDF-2）中的图案进行比较，可以证实它们的存在。在实验组成范围内，熔融KF-K₂NbF₇-Nb₂O₅系统的相图由五个晶化区域组成，分别对应KF、K₃NbF₈、K₂NbF₇、K₂NbO₃F和K₃NbOF₆。

• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Nb: MVol.A, 2.1, page 31 - 51
  作者：

  DOI：——

  日期：——