Knowledge about such changes can generally be deduced from knowledge of the stereochemistry (three-dimensional structures) of the starting materials, intermediates, and final products (provided these are obtained under kinetic control).
This approach requires an aggressive chemical and analytical search for potential impurities in the starting materials, intermediates and drug substance, and experimental studies to track their fate through the manufacturing process in order to understand the process capability for rejecting such impurities.
Production and distribution stages are separated to depict different activities (i.e., transformation and storage processes) and ingoing product states (i.e., raw materials, intermediate and finished products).
Using readily available starting materials, intermediates 1 and 2 were prepared following a previously described procedure [17].
A supply chain is a network of facilities that performs the functions of procurement of material, transformation of material to intermediate and finished products, and distribution of finished products to customers [ 35].
A gozinto graph represents a graphical listing of raw materials, parts, intermediates and subassemblies, which a process transforms into an end product, through a sequence of operations.
The ultimate goal of the occupational toxicologist is to define the hazards of handling chemical raw materials, process intermediates, and finished products in order to determine appropriate handling practices.
The EU guidance states that all active pharmaceutical ingredients (API) require an ADE; however, other substances such as starting materials, process intermediates, and cleaning agents may benefit from an ADE.
The United States, for example, publishes indexes for commodities classified according to stage of processing (crude materials, intermediate materials, and finished goods), according to the durability or nondurability of the products, and according to the economic sector for which goods are intended (consumers, producers, etc).
The rule that only finished or final goods must be counted is necessary to avoid double or triple counting of raw materials, intermediate products, and final products.
