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Properties of substance:

haleite

Synonyms:

ethylenedinitramine
EDNA

Group of substances:

organic

Physical appearance:

white rhombic crystals

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

C2H6N4O4

Structural formula as text:

(CH2NHNO2)2

Melting point (°C):

175-178

Solubility (g/100 g of solvent):

1,4-dioxane: soluble [Ref.]
acetone: very soluble [Ref.]
benzene: slightly soluble [Ref.]
chloroform: very slightly soluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol 95%: 1.25 (25°C) [Ref.]
ethanol 95%: 2.45 (50°C) [Ref.]
ethanol 95%: 10.1 (75°C) [Ref.]
nitrobenzene: soluble [Ref.]
water: 0.2 (18°C) [Ref.]
water: 0.3 (25°C) [Ref.]
water: 0.75 (40°C) [Ref.]
water: 1.25 (50°C) [Ref.]
water: 2.13 (60°C) [Ref.]
water: 4.95 (75°C) [Ref.]
water: 6.38 (80°C) [Ref.]
water: 16.4 (95°C) [Ref.]

Numerical data:

Year of discovery: 1886
Impact sensitivity (cm): 25
Heat of Explosion (kJ/kg): 5334
Detonation velocity (m/s): 7570
Detonation velocity (m/s): 7750

Density:

1.75 (g/cm3)

Dissociation:

pKa (1) = 5.35 (20°C, water)
pKa (2) = 6.66 (20°C, water)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-103.4 (s) [Ref.]

References:

  1. Encyclopedia of explosives and related items. - Vol. 6. - New Jersey, 1974. - pp. E238-E243
  2. Орлова Е.Ю. Химия и технология бризантных взрывчатых веществ. - Л.: Химия, 1973. - pp. 479-483 [Russian]
  3. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 498 [Russian]
  4. Энергетические конденсированные системы. - Под ред. Жукова Б.П., 2-е изд. - М.: Янус-К, 2000. - pp. 591 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru