We begin by describing the experiments that were performed to generate the raw data that forms the basis of our study. A DeviceX™ reaction probe and a Vernier thermometer were inserted into the reaction vessel for each reaction (computer-rendered image shown in Figure ). The DeviceX™ contains a series of immersed sensors, exposed sensors, and a camera at the end for recording colour. Additionally, an environmental sensor, placed in the fumehood, measured the ambient temperature, humidity, and light levels. The data collected from this equipment was saved to a cloud storage and comprises several time-series. The experimental procedure was based on an optimised reaction obtained from the literature. This exact literature route was repeated four times. Then the modified version shown in Figure was used in the next 11 runs. The original route used tert-amyl alcohol (TAA) in place of isopropyl alcohol (IPA) and only ran for two hours. One difference between the solvents is that IPA's boiling point is 82.5 °C compared to 102 °C for TAA. Other variations between reactions included: the version of DeviceX™ probe which was used and what sensor data was recorded, the type of thermometer used and the rate of hydrazine addition. All of these are variations are displayed in Table in the Supplementary Information. The first four experiments (001 to 011) and 024 were excluded, because the reaction probe used in these did not collect colour data (Figure in the SI). This left ten reactions to use for modelling and evaluation of the models. The first eight runs ran for a duration of five hours and the last two were left for longer (eight hours) as there was evidence that the reaction was still progressing.