HP represented 30.5 ± 0.5 mg, corresponding to 73.5 wt% of the API. Dermatan sulfate (DS) impurity represented 1.7 ± 0.3 mg, corresponding to 4.1 wt% of API. Contaminant, representing 9.3 ± 0.1 mg corresponding to 22.4 wt% of API, was found in the contaminated formulated drug product.