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01110 Sigma-Aldrich

Ammonium hydrogen difluoride

puriss., ≥97.5%

Synonym: Ammonium bifluoride, Etching powder

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Properties

Related Categories Ammonium Salts, Essential Chemicals, Research Essentials, Salts
InChI Key   KVBCYCWRDBDGBG-UHFFFAOYSA-N
grade   puriss.
assay   ≥97.5%
impurities   ≤0.001% heavy metals (as Pb)
  ≤0.03% hexafluorosilicate (as (NH4)2SiF6)
mp   125 °C(lit.)
anion traces   chloride (Cl-): ≤50 mg/kg
  sulfate (SO42-): ≤50 mg/kg
  sulfite (SO32-): ≤50 mg/kg
cation traces   Ca: ≤50 mg/kg
  Fe: ≤100 mg/kg
  K: ≤50 mg/kg
  Mg: ≤50 mg/kg

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