Fluoroantimonic acid
- CAS No.
- 16950-06-4
- Chemical Name:
- Fluoroantimonic acid
- Synonyms
- HEXAFLUOROANTIMONIC ACID;FLUOROANTIMONIC ACID;hexafluoroantimonyic acid;Hexafluoroantimonicacid6H2O;antimony,hydron,hexafluoride;HYDROGEN HEXAFLUOROANTIMONATE(V);Fluoroantimonic acid,65% in water;HEXAFLUOROANTIMONIC ACID, ANHYDROUS;Hexafluoroantimonicacidhexahydrate98%;FLUOROANTIMONIC ACID, TRIPLE-DISTILLED
- CBNumber:
- CB6137791
- Molecular Formula:
- F6HSb
- Molecular Weight:
- 236.76
- MDL Number:
- MFCD00011327
- MOL File:
- 16950-06-4.mol
- MSDS File:
- SDS
| Melting point | 20°C |
|---|---|
| Density | 2.885 g/mL at 25 °C(lit.) |
| vapor pressure | 14 mm Hg ( 18 °C) |
| form | liquid |
| color | yellow to colorless |
| Water Solubility | It is fully miscible with water, soluble in SO2ClF, SO2. |
| Exposure limits |
ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3 |
| InChI | 1S/6FH.Sb/h6*1H;/q;;;;;;+5/p-5 |
| InChIKey | MBAKFIZHTUAVJN-UHFFFAOYSA-I |
| SMILES | F.F[Sb](F)(F)(F)F |
| CAS DataBase Reference | 16950-06-4(CAS DataBase Reference) |
| EPA Substance Registry System | Antimonate(1-), hexafluoro-, hydrogen, (OC-6-11)- (16950-06-4) |
| UNSPSC Code | 12352302 |
| NACRES | NA.23 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |    GHS05,GHS06,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H300+H310+H330-H314-H411 | |||||||||
| Precautionary statements | P260-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter | |||||||||
| Hazard Codes | Xn,N,C,T+ | |||||||||
| Risk Statements | 20/22-51/53-35-26/27/28 | |||||||||
| Safety Statements | 61-45-36/37/39-28-26 | |||||||||
| RIDADR | UN 2922 8/PG 2 | |||||||||
| WGK Germany | 2 | |||||||||
| Hazard Note | Corrosive | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | II | |||||||||
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
|||||||||
| Hazard Classifications | Acute Tox. 1 Dermal Acute Tox. 2 Inhalation Acute Tox. 2 Oral Aquatic Chronic 2 Eye Dam. 1 Skin Corr. 1A |
|||||||||
| NFPA 704 |
|
Fluoroantimonic acid price More Price(9)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 175102 | Fluoroantimonic acid purified by triple-distillation | 16950-06-4 | 50g | $360 | 2026-04-30 | Buy |
| Strem Chemicals | 93-5130 | Hydrogen hexafluoroantimonate(V), 65-70% aqueous solution | 16950-06-4 | 25g | $104 | 2026-04-30 | Buy |
| Strem Chemicals | 93-5130 | Hydrogen hexafluoroantimonate(V), 65-70% aqueous solution | 16950-06-4 | 100g | $305 | 2026-04-30 | Buy |
| American Custom Chemicals Corporation | ING0004301 | HEXAFLUOROANTIMONIC ACID 95.00% | 16950-06-4 | 25G | $526 | 2021-12-16 | Buy |
| American Custom Chemicals Corporation | ING0004301 | HEXAFLUOROANTIMONIC ACID 95.00% | 16950-06-4 | 50G | $652 | 2021-12-16 | Buy |
Fluoroantimonic acid Chemical Properties, Uses, Production
Chemical Properties
superacid; moisture sensitive [KIR78] [ALD94]
Strongest superacid known
mixture of HF and SbF5 (1:1 is strongest)
Protonate even hydrocarbons to afford carbocations and H2.
2×1019 (20 quintillion) times stronger than 100% sulfuric acid.
Ho values of -31.3
Uses
Fluoroantimonic acid is an excellent medium for the preparation of alkylidene oxonium salts.
Preparation
Fluoroantimonic acid is produced by reacting hydrogen fluoride (HF) with antimony pentafluoride (SbF5).
SbF5+HF→SbF6+HF
General Description
HF/SbF5 may be synthesized by mixing hydrogen fluoride and antimony fluoride.1 Fluoroantimonic acid (HF/SbF5), is a combination of SbF5 and HF. It is the known strongest liquid superacid.
Materials Uses
Researchers selected poly(9,9-dioctylfluorene-alt-N-(4-secbutylphenyl)-diphenylamine) (TFB), a benchmark HTL material used in QLEDs, in combination with SU-8, a widely used negative photoresist. The TFB layer undergoes chemical degradation during the exposure process due to reactions with fluoroantimonic acid (HSbF6) released by the photoacid generator (PAG) in the SU-8 photoresist. HSbF6, one of the strongest known inorganic acids, is an essential component in SU-8 for initiating polymerization by protonating epoxide groups in resin monomers during post-baking. However, its extreme acidity can corrode the TFB layer[3].
References
[1] J. OLAH G. O. Synthetic Method and Reactions; V. 1 Fluoroantimonic Acid, a Convenient Superacid Catalyst for the Improved Isomerization of Tetrahydrodicyclopentadiene to Adamantane[J]. Synthesis-Stuttgart, 2002, 106 1: 488-488. DOI:10.1055/S-1973-22239.
[2] ZENGSHE LIU Atanu B. Fluoroantimonic acid hexahydrate (HSbF6·6H2O) catalysis: The ring-opening polymerization of epoxidized soybean oil[J]. Applied Catalysis A: General, 2013, 453: Pages 370-375. DOI:10.1016/j.apcata.2012.12.028.
[3] Wang, C., He, S., Liu, Y., Sun, Y., Peng, F., Zhu, X., Jin, W., Chen, D., Ying, L., Hao, Y., Li, H., & Jin, Y. (2025). High-resolution and high-efficiency micro quantum-dot light-emitting diode arrays via conventional photolithography. Nano Research, 18(9), 94907407. https://doi.org/10.26599/nr.2025.94907407
Fluoroantimonic acid Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| Beijing HuaMeiHuLiBiological Chemical | 010-56205725 | waley188@sohu.com | China | 12323 | 58 |
| Shanghai Macklin Biochemical Co.,Ltd. | 15221275939 15221275939 | shenlinxing@macklin.cn | China | 15775 | 55 |
| Sigma-Aldrich | 021-61415566 800-8193336 | orderCN@merckgroup.com | China | 51389 | 80 |
| Shanghai YuanYe Biotechnology Co., Ltd. | 15026964105 | 2881489226@qq.com | China | 89667 | 60 |
| Shandong Xiya Chemical Co., Ltd. | 4009903999 13395398332 | sales@xiyashiji.com | China | 20788 | 60 |
| JinJin Le Chemical Co., Ltd | 18001959627(微信同号) 18001959627 | jjlchem2@163.com | China | 9890 | 58 |
| Shandong Ono Chemical Co., Ltd. | 0539-6362799 20） | China | 9998 | 58 | |
| Rhawn Reagent | 400-400-1332688 18019345275 | huyue@rhawn.cn | China | 14942 | 58 |
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