Fluorosilicic acid solution - AR, 30.0-32.0% , CAS No.16961-83-4

CAS: 16961-83-4 Cat. No.: F111657 Molecular Weight: 144.09 EC Number: 241-034-8 PubChem CID: 21863527
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GRADE & PURITY AR ? Analytical Reagent grade — high-purity chemicals meeting strict assay limits for lab analysis. Use when accuracy matters and trace impurities could skew results. 30.0-32.0%
Synonyms
Dihydrogen hexafluorosilicate | OHORFAFFMDIQRR-UHFFFAOYSA-P | FLUOSILICIC ACID [MI] | FT-0626488 | Hydrofluorosilicic acid | Dihydrogen hexafluorosilicate(2-) | Fluorosilicic acid | Silicate(2-), hexafluoro-, dihydrogen | DTXSID2029741 | Kieselfluorwasser
Storage
Room temperature
Shipped In
FedEx DG Service
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Size
Status
Price
Qty
100ml
F111657-100ml
3
$9.90
500ml
F111657-500ml
5

$17.90

$21.90
Save $4.00 (18.26%)
12×500ml
F111657-12×500ml
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$183.90

$236.90
Save $53.00 (22.37%)
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Why this grade

AR, 30.0-32.0% AR for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature Ships FedEx DG Service Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 16 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

High-silic fluoro silicic acids have been prepared. They have desired amount of extra silica upto 18% more than the composition as represented by H2SiF6. Preparation and properties of fluosilicic acid have been reported. Fluosilicic acid can be obtained as a major byproduct of phosphate fertilizer industry.It can be used in the preparation of sodium fluorosilicate, via neutralization with sodium chloride. It can also undergo neutralization with ammonia to produce ammonium fluoride and silica.

Specifications

Synonyms
Dihydrogen hexafluorosilicate | OHORFAFFMDIQRR-UHFFFAOYSA-P | FLUOSILICIC ACID [MI] | FT-0626488 | Hydrofluorosilicic acid | Dihydrogen hexafluorosilicate(2-) | Fluorosilicic acid | Silicate(2-), hexafluoro-, dihydrogen | DTXSID2029741 | Kieselfluorwasser
Specifications & Purity
AR, 30.0-32.0%
Storage
Room temperature
Shipped In
FedEx DG Service
This product requires cold chain shipping. Ground and other economy services are not available.
Grade
AR
Names and Identifiers
Canonical Smiles[H+].[H+].F[Si-2](F)(F)(F)(F)F
IUPAC Namehexafluorosilicon(2-);hydron
InChIKeyOHORFAFFMDIQRR-UHFFFAOYSA-P
INCHI1S/F6Si/c1-7(2,3,4,5)6/q-2/p+2
Isomeric SMILES [H+].[H+].F[Si-2](F)(F)(F)(F)F
WGK Germany 2
PubChem CID 21863527
UN Number 1778
Packing Group II
Molecular Weight 144.09

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomInorganic compounds
SuperclassMixed metal/non-metal compounds
ClassMetalloid salts
SubclassMetalloid fluorides
Intermediate Tree Nodes Not available
Direct ParentMetalloid fluorides
Alternative Parents Not available
Molecular FrameworkNot available
Substituents Metalloid fluoride
DescriptionThis compound belongs to the class of inorganic compounds known as metalloid fluorides. These are inorganic compounds in which the largest halogen atom is fluorine, and the heaviest metal atom is a metalloid.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

25 results found

Lot NumberCertificate TypeDateItem
I2313378Certificate of AnalysisJun 15, 2026 F111657
J2516618Certificate of AnalysisOct 24, 2025 F111657
J2516617Certificate of AnalysisOct 24, 2025 F111657
H2512481Certificate of AnalysisAug 23, 2025 F111657
H2512479Certificate of AnalysisAug 23, 2025 F111657
F2405389Certificate of AnalysisJun 22, 2024 F111657
D2624052Certificate of AnalysisJun 17, 2024 F111657
F2405390Certificate of AnalysisJun 17, 2024 F111657
F2526033Certificate of AnalysisJun 17, 2024 F111657
A2507048Certificate of AnalysisJun 17, 2024 F111657
C2528230Certificate of AnalysisJun 17, 2024 F111657
E2416245Certificate of AnalysisMar 16, 2024 F111657
J2326381Certificate of AnalysisNov 07, 2023 F111657
J2326320Certificate of AnalysisNov 07, 2023 F111657
J2309486Certificate of AnalysisOct 11, 2023 F111657
I2313379Certificate of AnalysisSep 16, 2023 F111657
H2322014Certificate of AnalysisAug 29, 2023 F111657
G2219175Certificate of AnalysisJan 11, 2023 F111657
H2212190Certificate of AnalysisAug 30, 2022 F111657
H2212187Certificate of AnalysisAug 30, 2022 F111657
F2209381Certificate of AnalysisJun 14, 2022 F111657
F2209380Certificate of AnalysisJun 14, 2022 F111657
B2215535Certificate of AnalysisFeb 18, 2022 F111657
B2215520Certificate of AnalysisFeb 18, 2022 F111657
B2215490Certificate of AnalysisFeb 18, 2022 F111657

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Chemical and Physical Properties
SolubilityMiscible with water.
Molecular Weight144.091 g/mol
XLogP3
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count7
Rotatable Bond Count0
Exact Mass143.983 Da
Monoisotopic Mass143.983 Da
Topological Polar Surface Area0.000 Ų
Heavy Atom Count7
Formal Charge0
Complexity62.700
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count3
Documents & Articles
Citations of This Product
References
1. Wenrui Zhang, Zhaowu Wang, Shiyu Jia, Yayun Zhou, Haipeng Ji.  (2023)  Millimeter-Sized K2MnF6:Si4+, NH4+ Red-Luminescent Crystals with High Absorption Efficiency (AEmax of 93.5%) and External Quantum Efficiency (EQEmax of 68.9%) Grown by Cooling-Induced Crystallization.  INORGANIC CHEMISTRY,      [PMID:38115192] [10.1021/acs.inorgchem.3c03844]
2. Binbin He, Yuanzhi Zhu, Yun Zu, Yunxiang Nie, Yi Mei.  (2023)  Designing an efficient fluorine recovery strategy for Wet-Process phosphoric acid purification by disclosing competitive complexation behavior between fluorine species and metal cations.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2023.124219]
3. Yulin Xu, Wenjing Xiong, Jiaqi Huang, Xinglin Tang, Hongqiang Wang, Wei Liu, Dan Xiao, Yong Guo, Yongzhi Zhang.  (2023)  Pressure-induced growth of coralloid-like FeF2 nanocrystals to enable high-performance conversion cathode.  Journal of Energy Chemistry,      [PMID:] [10.1016/j.jechem.2023.01.006]
4. Zirui Zhao, Jiamei Liu, Xifeng Xi, Yulong Wu, Junshe Zhang.  (2022)  Synthesis of Cellular Silica Using Microbubbles as Templates.  Nanomaterials,  12  (16): (2794).  [PMID:36014658] [10.3390/nano12162794]
5. Kai Guo, Aizeng Ma, Zijian Wang, Jinzhi Li, Bingfeng Wu, Tong Liu, Dadong Li.  (2022)  Investigation of n-heptane hydroisomerization over alkali-acid-treated hierarchical Pt/ZSM-22 zeolites.  NEW JOURNAL OF CHEMISTRY,  46  (35): (16752-16763).  [PMID:] [10.1039/D2NJ02820D]
6. Zhaowu Wang, Haipeng Ji, Zongtao Zhang, Jian Xu, Deliang Chen.  (2021)  Solution growth of millimeter-scale Na2SiF6 single crystals for Mn4+-doping as red phosphor.  JOURNAL OF THE AMERICAN CERAMIC SOCIETY,  104  (10): (5077-5085).  [PMID:] [10.1111/jace.17739]
7. Hong Ming, Yifei Zhao, Yayun Zhou, Shuai Zhang, Yuanjing Wang, Enhai Song, Zhiguo Xia, Qinyuan Zhang.  (2020)  A Guanidinium-Based Mn4+-Doped Red-Emitting Hybrid Phosphor with High Stability.  ACS Applied Electronic Materials,      [PMID:] [10.1021/acsaelm.0c00916]
8. Yayun Zhou, Changkai Yu, Enhai Song, Yuanjing Wang, Hong Ming, Zhiguo Xia, Qinyuan Zhang.  (2020)  Three Birds with One Stone: K2SiF6:Mn4+ Single Crystal Phosphors for High-Power and Laser-Driven Lighting.  Advanced Optical Materials,  (23): (2000976).  [PMID:] [10.1002/adom.202000976]
9. Fei Tang, Zhicheng Su, Honggang Ye, Shijie Xu, Wang Guo, Yongge Cao, Wenpei Gao, Xiaoqing Pan.  (2017)  Boosting phonon-induced luminescence in red fluoride phosphors via composition-driven structural transformations.  Journal of Materials Chemistry C,  (46): (12105-12111).  [PMID:] [10.1039/C7TC04695B]
10. Rou-Yu Li, Wenyu Yuan, Shuo Wang, Peng Zhang, Heng Wu, Yi-Min Su, En-Lei Wen, Xiaolin Zhu, Quan-Guo Zhai.  (2024)  Controllable Regulation of CO2 Adsorption Behavior via Precise Charge Donation Modulation for Highly Selective CO2 Electroreduction to Formic Acid.  Small,      [PMID:39449203] [10.1002/smll.202408351]
11. Wenrui Zhang, Yayun Zhou, Ce Shi, Jiajun Ren, Liying Zhang, Haipeng Ji.  (2024)  K2SiF6:Mn4+ red-luminescent crystals with high external quantum efficiency (EQEmax of 78%) and high thermal quenching temperature (T1/2 > 500 K) enabling high brightness warm white LEDs.  Journal of Materials Chemistry C,      [PMID:] [10.1039/D4TC04035J]
12. Binbin He, Ying Fu, Yun Zu, Yunxiang Nie, Yi Mei.  (2024)  Simultaneous removal of Al3+, Mg2+ and F- from wet-process phosphoric acid achieved by a co-precipitation strategy.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2024.126855]
13. Haifeng Zhe, Zongqi Chen, Jie Li, Yayun Zhou, Qiang Zhou, Zhengliang Wang.  (2025)  Thermal-Pressure Induced Phase Transition for Enhanced K2SiF6:Mn4+ Luminescence toward Efficient LEDs.  JOURNAL OF ALLOYS AND COMPOUNDS,      [PMID:] [10.1016/j.jallcom.2025.182911]
14. Long Yao, Guixuan Shan, Abrar Laiba, Yu Zhao, Yujiao Zhang, Ru’an Chi, Bingwen Long, Wei Li, Jinli Zhang.  (2025)  Fluoride species conversion-enhanced selective extraction: A green and safe strategy for fluorine recovery in wet-process phosphoric acid production.  Journal of Environmental Chemical Engineering,      [PMID:] [10.1016/j.jece.2025.119345]
15. Zhaowu Wang, Zhiyu Min, Liping Tian, Wenrui Zhang, Hao Li, Jinlong Chen, Derong Zhu.  (2025)  Mn⁴⁺-doping-induced structural transformation and luminescence enhancement in bulk (NH₄)₂SiF₆: Mn⁴⁺ crystal grown via cooling crystallization.  JOURNAL OF ALLOYS AND COMPOUNDS,      [PMID:] [10.1016/j.jallcom.2025.182231]
16. Jinwu Bai, Qing Ke, Yujia Wang, Ran Wang, Xingxing Gu, Xiaolei Ren.  (2025)  A Comparison Study on the Constructed Polypyrrole Coating and Polypyrrole-Derived Carbon Coating for the Electrochemical Performance of the Iron Difluoride Cathode.  LANGMUIR,      [PMID:40408549] [10.1021/acs.langmuir.5c00319]
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