Figure 2.

Main plot: Number of unique observed product use categories (PUCs) that are grouped within each unique general category for 13 selected select compounds (see manuscript text for compound selection). A single PUC is a unique combination of 3 hierarchical levels: general category (top level), product family (middle level), and product type (bottom level). An example of a full PUC is: personal care, hair styling and care, hair shampoo. This PUC would be grouped into the “personal care” general category. Insert: The hierarchical organization of PUCs grouped within the “personal care” general category. Darker blue circles represent middle-level product family designations and light blue circles represent bottom-level product types. For example, there are 11 specific product types (e.g., hair shampoo, hair conditioner, etc.) within the product family “hair styling and care”. The product families with the 5 largest number of product types are labeled. Circle size is proportional to how many of the 13 compounds were associated with that product family or type.