Alkanes with a chain length of approximately 35 or more carbon atoms are found in bitumen, used, for example, in road surfacing.
ˈælkeɪnz wɪð ɐ tʃˈeɪn lˈɛŋθ ʌv ɐpɹˈɑːksɪmətli θˈɜːɾi fˈaɪv ɔːɹ mˈoːɹ kˈɑːɹbən ˈæɾəmz ɑːɹ fˈaʊnd ɪn bɪtˈuːmɛn, jˈuːzd, fɔːɹ ɛɡzˈæmpəl, ɪn ɹˈoʊd sˈɜːfɪsɪŋ.