Follow each reactor batch from raw charge to tank, drum and tanker with its assay on record.

Bulk chemicals are sold on purity and on volume. A buyer wants an acid at a stated concentration, a solvent at a stated assay, or a salt in a stated grade, and expects the same figure on every tanker. Margins are thin, so yield and loss matter.

The records that prove it are often kept apart. Charge sheets sit in the control room, assay results live in the laboratory’s own file, and tank levels are read off a gauge and written in a logbook. The weighbridge ticket is on a separate computer again. When a customer disputes the strength of a delivery, the plant must reconcile four sources before it can answer. The tanker has long gone.

Raw materials arrive by road tanker, rail wagon or drum and are weighed at the gate, sampled and unloaded to a storage tank or warehouse. Operators charge the reactor to a recipe, control temperature and pressure through the reaction, and take in-process samples. The batch is transferred to a finished product tank once the laboratory confirms concentration, density and impurity levels.

Orders are filled from tank stock. A tanker is weighed empty, loaded to the order quantity, sealed and weighed again, with a certificate of analysis and a safety data sheet in the paperwork. Smaller customers receive drums or intermediate bulk containers filled on a packing line. Waste and effluent from each batch are logged, and the plant manager reviews yield against theory every week. Then the next batch starts.