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Properties of substance:

cyclopentane

Group of substances:

organic

Physical appearance:

colorless liquid

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

C5H10

Structural formula as text:

(CH2)5

Molar/atomic mass: 70.133

Melting point (°C):

-93.9

Boiling point (°C):

49.3

Solubility (g/100 g of solvent):

ethanol: soluble [Ref.]
furfural : 18.34 (19.3°C) [Ref.]
methanol: 84 (5°C) [Ref.]
methanol: 107.5 (10°C) [Ref.]
methanol: 175 (15°C) [Ref.]
methanol: miscible (16.6°C) [Ref.]
water: 0.016 (25°C) [Ref.]
water: 0.0296 (99.1°C) [Ref.]

Density:

0.755 (20°C, g/cm3)

Refractive index (nD):

1.4067 (20°C)

    Dissociation:

    pKa (1) = 44 (20°C, water)

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

    -105.1 (l)

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

    204.5 (l)

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

    128.8 (l)

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

    -76.4 (g)

    LD50 (mg/kg):

    11400 (rats, oral)
    12800 (mice, oral)

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-29
    2. Journal of Chemical and Engineering Data. - 1961. - Vol. 6, No. 3. - pp. 339
    3. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 158-159
    4. Гордон А., Форд Р. Спутник химика. - М.: Мир, 1976. - pp. 77 [Russian]
    5. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 108-109 [Russian]
    6. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1358 [Russian]
    7. Токсикологический вестник. - 2000. - №4. - pp. 34 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru