Melanin
Amino acid
>
Melanin is a family of biomolecules organized as oligomers or polymers, which among other functions provide the pigments of many organisms. Melanin pigments are produced in a specialized group of cells known as melanocytes. Wikipedia
Chemical formula: C18H10N2O4
Boiling point: 450 to 550 °C (842 to 1,022 °F; 723 to 823 K)
Density: 1.6 to 1.8 g/cm3
Melting point: < −20 °C (−4 °F; 253 K)
Molar mass: 318.288 g·mol−1