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Properties of substance:

pentachlorophenol



skc-file

Group of substances:

organic

Physical appearance:

white monoclinic crystals

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

C6HCl5O

Structural formula as text:

C6Cl5OH

Molar/atomic mass: 266.336

Melting point (°C):

191

Boiling point (°C):

309.3

Decomposition temperature (°C):

310

Solubility (g/100 g of solvent):

1,4-dioxane: 11.5 (20°C) [Ref.]
acetone: 21.5 (20°C) [Ref.]
benzene: 11 (20°C) [Ref.]
carbon tetrachloride: 2 (20°C) [Ref.]
chromyl chloride: sparingly soluble [Ref.]
diethyl ether: very soluble 45.8 (10°C) [Ref.]
diethyl ether: 52 (20°C) [Ref.]
ethanol: very soluble 39 (0°C) [Ref.]
methanol: 57 (20°C) [Ref.]
water: 0.0005 (0°C) [Ref.]
water: 0.0012 (15°C) [Ref.]
water: 0.002 (30°C) [Ref.]
water: 0.0035 (50°C) [Ref.]

Density:

1.978 (22°C, g/cm3)

Vapour pressure (Torr):

0.00001 (0°C)
0.00017 (20°C)
0.0031 (50°C)
0.024 (75°C)
0.14 (100°C)
0.49 (120°C)
1.5 (140°C)
4.3 (160°C)
20 (192.2°C)
40 (211.2°C)
60 (223.4°C)
100 (239.6°C)
200 (261.8°C)
400 (285°C)

Dissociation:

pKa (1) = 4.92 (25°C, water)

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

-292.5 (s)

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

253.2 (s)

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

202 (s)

LD50 (mg/kg):

250 (rabbits, oral)
100 (rats, subcutaneous)
56 (rats, intraperitoneal)
250 (dogs, oral)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-30
  2. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 188-189
  3. Вредные химические вещества: Галоген- и кислородсодержащие органические соединения. Справочник. - СПб.: Химия, 1994. - pp. 242-250 [Russian]
  4. Промышленные хлорорганические продукты: Справочник. - М.: Химия, 1978. - pp. 419-425 [Russian]
  5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 1050-1051 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru