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Hydrogen fluoride Structure

Hydrogen fluoride

Chemical Properties

Melting point -35°C
Boiling point 105°C
Density  1.15 g/mL at 25 °C(lit.)
vapor density  1.27 (vs air)
vapor pressure  25 mm Hg ( 20 °C)
Flash point 112°C
storage temp.  Store at +5°C to +30°C.
solubility  very soluble in H2O, ethanol; soluble in ethyl ether
pka 3.17(at 25℃)
form  Liquid, Double Sub-Boiling Quartz Distillation
Specific Gravity 1.15
Odor Acrid, irritating odor
PH Range 1
PH 3.27(1 mM solution);2.65(10 mM solution);2.12(100 mM solution)
Water Solubility  soluble
Sensitive  Hygroscopic
Merck  14,4790
Exposure limits Ceiling limit 3 ppm (~2.5 mg/m3) as F (ACGIH); TWA 3 ppm (MSHA and OSHA).
Dielectric constant 17.0(-73℃)
Stability Stable. Hygroscopic. Incompatible with glass, alkali metals, light metals, alkaline earth metals
LogP 0.1 at 20℃
Indirect Additives used in Food Contact Substances HYDROFLUORIC ACID
FDA 21 CFR 175.105
CAS DataBase Reference 7664-39-3(CAS DataBase Reference)
EWG's Food Scores 3-6
FDA UNII RGL5YE86CZ
NIST Chemistry Reference Hydrogen fluoride(7664-39-3)
EPA Substance Registry System Hydrofluoric acid (7664-39-3)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H300+H310+H330-H314
Precautionary statements P260-P270-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T+,C,T,Xn
Risk Statements  26/27/28-35-36/37/38-20/21/22
Safety Statements  26-36/37/39-45-7/9-36/37-28-36
RIDADR  UN 1790 8/PG 2
WGK Germany  2
RTECS  MW7875000
Hazard Note  Corrosive
TSCA  Yes
DOT Classification 8, Hazard Zone C (Corrosive material)
HazardClass  8
PackingGroup  II
HS Code  28111100
Hazardous Substances Data 7664-39-3(Hazardous Substances Data)
Toxicity LC50 (15 min.) in rats, guinea pigs: 2689, 4327 ppm (Rosenholtz)
IDLA 30 ppm
NFPA 704:
0
4 1

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