Hydrogen fluoride INDEX

PHYSICAL PROPERTIES white amorphous powder or white solid odorless has the greatest covering power of all inorganic white pigments soluble in hot concentrated sulfuric acid and hydrogen fluoride insoluble in water, hydrochloric acid, nitric acid, dilute sulfuric acid, and alcohol very high refractive index MP (1855°C, 3371°F) BP (2500-3000°C, 4532-5432°F) ND (3.9-4.3 gW) SG (3.9-4.3) CP (55.0 J/K-mol crystal at 25°C) VD (NA) VP (0 mmHg approximately). 

Pentafluorophenyl sulfone is highly reactive even at room temperature. The reaction is catalyzed by potassium fluoride. It activates the phenol group and acts as a base to absorb the hydrogen fluoride, which is a byproduct of the polycondensation. By adjusting the feed ratio of monomers, the refractive index and crosslinking density of the polymers can be readily controlled. ... 

Properties Colorless liq. insol. in water m.w. 350.05 dens. 1.79 kg/l (20 C) m.p. -37 C pour pt. -30 C b.p.73-77 C ref. index 1.3000 Toxicology LD (oral, rat) >100 ml/kg LCLo (inh., rat, 14 h) 825 ppm mildly toxic by inh. may cause irritation TSCA listed Precaution Avoid incompat. materials, strong oxidizers, dust generation Hazardous Decomp. Prods. CO, CO2, hydrogen fluoride heated to decomp., emits toxic fumes of F"... 

The self-ignition temperature of PVF film is 390°C. The limiting oxygen index (LOI) for PVF is 22.6%. Hydrogen fluoride and a mixture of aromatic and aliphatic hydrocarbons are generated from the thermal degradation of PVF. 

These results indicate that the metabolic disposition and thereby the pharmacological activity, whether efficacious or toxicological, could be modified by selective substitution of deuterium for hydrogen. A new combination antibacterial contains 3-fluoro-D-alanine-2-d which is an excellent example of selective deuteration to enhance the pharmacological activity of a therapeutic agent.7 The metabolism in vivo of 3-fluoro-D-alanine is reduced several-fold by substitution of deuterium for hydrogen on the 2-position without loss of antibacterial activity. This enhances the therapeutic index of the compound because metabolism of 3-fluoro-D-alanine leads to the formation of an inactive antibacterial and fluoride which is nephrotoxic. 

Activation in air (°C) Fluoride content CO reduction (°C) Cocatalyst (ppm AlEt3) Hydrogen added Melt index (g (10 min)-1) HLMI (g (10 min)-1) Density (g mL-1)... 

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