A closer look at individual cases reveals further nuanced deviations in implementing the proxy data for heat inputs that remain unexplained in the documentation. For example, the heat input added to the ecoinvent database v2 dataset for chloromethyl methyl ether production is 1.9 MJ kg -1 , while both the dataset report and the other datasets from that time use a value of 2 MJ kg -1 instead. Another more recent example of inconsistencies in the individual datasets is the case of 55 3-methylpyridine production that receives all heat inputs from the dataset heat, from steam, in chemical industry instead of a split between that input and heat from natural gas like the majority of other recent datasets. Likewise, the electricity demand also experiences some implementation inconsisten-60 cies. For example, ethylene oxide production in the ecoinvent database v2 has been approximated as 0.33 kWh kg -1 of electricity, medium voltage, while the usually applied proxy amount at that time was instead 0.333 kWh kg -1 .