مرجع مواد شیمیایی ایران
اطلاعات عمومی اسید هگزا فلورو سیلیسیک
  • نام شیمیایی

    • اسید هگزا فلورو سیلیسیک

    • Hexafluorosilicic acid

  • مترادف ها
    • هگزا فلورو سیلیسیک اسید

    • Dihydrogen hexafluorosilicate ; Fluorosilicic acid ; fluosilic acid ; hydrofluorosilicic acid ; silicofluoride ; silicofluoric acid ; oxonium hexafluorosilanediuide

  • CAS
    16961-83-4
  • فرمول مولکولی
    F6H2Si
  • جرم مولکولی
    144/09
  • EINECS
    241-034-8
  • ICB Number
    ICB 3243
اسید هگزا فلورو سیلیسیک
  • شکل و حالت فیزیکی
    مایع بی رنگ
  • نقطه جوش
    108-109 °C
  • دانسیته
    1/22 g/cm3 (25% soln.)
  • ضریب شکست (n20/D­­)
    1/3465
  • دمای نگهداری
    -20 °C
  • حلالیت در آب
    محلول در آب
  • شماره CAS
    16961-83-4
  • شماره مرک (Merck)
    14,4182
  • EPA Substance Registry System
  • مراجع MSDS
  • ارائه دهنده
    زبان
  • انگلیسی
  • Chemical Properties
    • colourless liquid; often supplied as a colourless solution in water

  • General Description
    • A colorless fuming liquid with a penetrating pungent odor. Corrosive to metals and tissue. Both the fumes and very short contact with the liquid can cause severe and painful burns. Used in water fluoridation, in hardening cement and ceramics, as a wood preservative.

  • Air & Water Reactions
    • Fumes in air. Soluble in water with release of heat and corrosive fumes.

  • Reactivity Profile

    Hexafluorosilicic acid can react with strong acids (such as sulfuric acid) to release fumes of toxic hydrogen fluoride. Attacks glass and materials containing silica. Reacts exothermically with chemical bases (examples: amines, amides, inorganic hydroxides). Reacts with active metals, including iron and aluminum to dissolve the metal and liberate hydrogen and/or toxic gases. Can initiate polymerization in certain alkenes. Reacts with cyanide salts and compounds to release gaseous hydrogen cyanide. Flammable and/or toxic gases are also often generated by reactions with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and weak or strong reducing agents. Additional gas-generating reactions may occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. Can catalyze (increase the rate of) chemical reactions. Decomposes when heated to the boiling point to produce very toxic and corrosive hydrogen fluoride gas.

  • Health Hazard

    Inhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin.

  • Fire Hazard

    Special Hazards of Combustion Products: Irritating fumes of hydrogen fluoride may form in fire.

  • Preparation products

    Chromic acid -->Potassium fluoride-->Sodium tripolyphosphate -->Sodium fluorosilicate-->Lead-->Sodium tetrafluoroborate-->Sodium fluoride-->Potassium tetrafluoroborate-->Aluminum fluoride-->Trisodium hexafluoroaluminate-->Sodium fluoroaluminate-->Ammonium fluoborate-->Magnesium fluorosilicate-->ZINC SILICOFLUORIDE-->Magnesium fluosilicate-->MAGNESIUM HEXAFLUOROACETYLACETONATE DIHYDRATE-->Ammonium hexafluorosilicate-->Potassium fluorosilicate -->CUPRIC FLUOROSILICATE-->Magnesium hexafluorosilicate hexahydrate

  • Raw materials

    Sulfuric acid -->Hydrofluoric acid-->Celite -->Silicon dioxide-->Calcium fluoride-->Silicon dioxide