Fluorosulfuric acid

Modify Date: 2025-08-24 19:27:48

Fluorosulfuric acid Structure
Fluorosulfuric acid structure
Common Name Fluorosulfuric acid
CAS Number 7789-21-1 Molecular Weight 100.070
Density 1.9±0.1 g/cm3 Boiling Point 165.5±9.0 °C at 760 mmHg
Molecular Formula FHO3S Melting Point −87.3 °C(lit.)
MSDS USA Flash Point N/A
Symbol GHS05 GHS07
GHS05, GHS07
Signal Word Danger

 Names

Name sulfurofluoridic acid
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.9±0.1 g/cm3
Boiling Point 165.5±9.0 °C at 760 mmHg
Melting Point −87.3 °C(lit.)
Molecular Formula FHO3S
Molecular Weight 100.070
Exact Mass 99.963043
PSA 62.75000
LogP -0.16
Vapour density 3.5 (vs air)
Vapour Pressure 0.9±0.6 mmHg at 25°C
Index of Refraction 1.392
Stability Stable. May corrode glass. Incompatible with many metals, bases.

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
LP0715000
CHEMICAL NAME :
Fluorosulfuric acid
CAS REGISTRY NUMBER :
7789-21-1
LAST UPDATED :
199710
DATA ITEMS CITED :
8
MOLECULAR FORMULA :
F-H-O3-S
MOLECULAR WEIGHT :
100.07
WISWESSER LINE NOTATION :
H2 S-O3 F

 Safety Information

Symbol GHS05 GHS07
GHS05, GHS07
Signal Word Danger
Hazard Statements H314-H332
Precautionary Statements P280-P305 + P351 + P338-P310
Personal Protective Equipment Faceshields;full-face respirator (US);Gloves;Goggles;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes C,T
Risk Phrases R20
Safety Phrases S26-S45
RIDADR UN 1777 8/PG 1
WGK Germany 1
RTECS LP0715000
Packaging Group I
Hazard Class 8

 Synthetic Route

 Articles10

More Articles
Synthesis of alpha-fluorosulfonate and alpha-fluorosulfonamide analogues of a sulfated carbohydrate.

Org. Lett. 8(24) , 5617-20, (2006)

The first synthesis of sulfonamide and sulfonate analogues of a sulfated carbohydrate in which the ester oxygen of the sulfate is replaced with a CHF or CF2 group is reported. This was accomplished by...

Tailoring of interfacial mechanical shear strength by surface chemical modification of silicon microwires embedded in Nafion membranes.

ACS Nano 9 , 5143-53, (2015)

The interfacial shear strength between Si microwires and a Nafion membrane has been tailored through surface functionalization of the Si. Acidic (-COOH-terminated) or basic (-NH2-terminated) surface-b...

Perfluoro Allyl fluorosulfate (FAFS): a versatile building block for new fluoroallylic compounds.

Molecules 16 , 6512, (2011)

In this study we will present and discuss both the synthesis of CF(2) = CFCF(2)OSO(2)F (perfluoroallyl fluorosulfate, FAFS), focusing in particular on the important role of C(3)F(6)/SO(3) ratio, react...

 Synonyms

Fluorosulfonic acid
Fluorosulphuric acid
sulfofluoride
Fluorosulfuric acid (HSO3F)
MFCD00066174
Monofluorosulfuric acid
epoxysulfonyl fluoride
perfluorosulfonic acid
EINECS 232-149-4
trifluoromethyl phosphonic acid anhydride
fluosulfuric acid
fluorosulfuric acid
Fluosulfonic acid
Fluorosulphonic acid
Fluorosulfuric acid (HSO)
Sulfurofluoridic acid
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