Speciality chemicals are chemicals made for exactly one job, such as treating a paper mill's pulp, making circuit boards or reducing wear in a machine. They are made in smaller amounts than ordinary bulk chemicals, and buyers choose them for what they do, not for price. The supplier often sells them together with monitoring of how the customer uses them.
Here is a typical case. A paper mill near Saharanpur makes 300 tonnes of paper a day. A supplier's chemical is added to the pulp to keep the paper strong and the water clean. The supplier fits sensors that read the pulp, and a pump that adds the chemical. If the pulp changes, the software changes the dose. The mill adds about 2 kg of chemical for each tonne of paper, which is 600 kg a day. The supplier tracks this use and visits the mill to improve it.
The monitoring is part of the product because too little chemical spoils the paper, and too much wastes money and pollutes the water the mill must treat before releasing it. A supplier that sells the chemical alone competes on price. A supplier that also controls the dose is paid for the result, such as fewer broken sheets, and so competes on what the customer saves. This is the difference from a bulk chemical, which is the same whoever supplies it.
Other examples are the chemicals used to make circuit boards and chips, and lubricating oils and greases that reduce wear in machines. Leather and water treatment also use them. India has large clusters of these makers in Gujarat and Maharashtra, selling to Indian industry and exporting to foreign buyers.
The chemicals link to plant software in several ways. Dosing is adjusted through the plant's distributed control system. The chemicals' use of water and energy is reported through industrial energy management. New formulas are suggested by AI materials discovery. A special kind is the catalyst, a material that speeds up a reaction without being used up.
The maker sells to manufacturers, and a manufacturer rarely changes supplier once its process depends on the chemical, as advanced materials show. The wider area is materials science.