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Properties of substance:

ammonium fluoride

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

Empirical formula (Hill's system for organic substances):

H4FN

Structural formula as text:

NH4F

Molar/atomic mass: 37.04

Decomposition temperature (°C):

168

CAS №: 12125-01-8

Solubility (g/100 g of solvent):

acetone: 0.01 (25°C) [Ref.]
ammonia liquid : insoluble [Ref.]
dimethylsulfoxide: 0.11 (25°C) [Ref.]
ethanol: 1.75 (25°C) [Ref.]
hydrogen fluoride : 36.8 (-20°C) [Ref.]
hydrogen fluoride : 95.3 (25°C) [Ref.]
methanol: 2.88 (25°C) [Ref.]
water: 71.9 (0°C) [Ref.]
water: 74.1 (10°C) [Ref.]
water: 82.6 (20°C) [Ref.]
water: 83.5 (25°C) [Ref.]
water: 88.8 (30°C) [Ref.]
water: 111 (60°C) [Ref.]
water: 118 (80°C) [Ref.]

Hygroscopic:

yes

Density:

1.01 (25°C, g/cm3)

Reactions:

  1. Yeild 70%. [Ref.1]
    NH4F + 3F2 → NF3 + 4HF

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-463.6 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-348.4 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

71.96 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

65.27 (s)

Enthalpy (heat) of solution ΔsolH (kJ)

-59.8 (s) [Ref.]

LD50 (mg/kg):

31 (rats, intraperitoneal)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-46
  2. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 234
  3. Milne G.W.A. Gardner's Commercially Important Chemicals. - Wiley-Interscience, 2005. - pp. 33
  4. Patnaik P. Handbook of inorganic chemicals. - McGraw-Hill, 2003. - pp. 35-37
  5. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 22-23
  6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 54 [Russian]
  7. Успехи химии. - 1984. - Т.53, №9. - pp. 1463-1492 [Russian]
  8. Фториды аммония. - М., 1988. - pp. 8-28 [Russian]
  9. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 44 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru