The network of interest in this case study is a network centred around the sample strategic molecule, 4-hydroxyacetophenone (4-HAP), referred later as '4-HAP network'. 4-HAP is a common precursor for many pharmaceutical products such as paracetamol, metoprolol, and salbutamol, and can be derived from terpenes, including mixed waste streams such as CST. The 4-HAP network is a scale-free, non-weighted, and directed graph. It consists of 568,270 nodes and 955,905 edges. The degree distributions in the network follow a power law behaviour with the exponents gout=2.1, and gin =2.3 (see Equation ).