Pharma starting materials and intermediates: Production route
Nitration, condensation or fermentation: how KSMs are made
What this tab covers How it is made: the main production routes or, for product families, the main product types and technologies, compared on share of supply, inputs per tonne, plant scale, yield, co-products and unit cost.KSMs are made either by bulk organic chemistry or by fermentation. Chemical KSMs come from aromatic feedstocks through nitration, reduction, chlorination and condensation, often in plants that also make dyes or agrochemical intermediates. Fermentation KSMs need large aerobic fermenters, cheap glucose and cheap power. The economics are those of fine chemicals: batch plants of a few thousand tonnes, where solvent recovery and effluent handling decide cost.
Routes compared
| Route | Share of supply | Inputs per tonne | Typical scale | Yield | Co-products | Unit cost |
|---|---|---|---|---|---|---|
| Nitration and hydrogenation (amino-aromatics, e.g. para-aminophenol) | main route for PAP (indicative) | about 1.1-1.3 t nitrobenzene per t PAP (stoichiometric 1.13; indicative) | Meghmani 13,500 t/yr | not published | aniline, ammonium sulphate | not published |
| Condensation and heterocycle synthesis | large share of HS 2933 tonnage (indicative) | not published | 1,000-20,000 t/yr | not published | salts, ammonia | not published |
| Fermentation KSMs | all beta-lactam supply | glucose or starch plus large electricity loads | Lyfius 15,000 t/yr penicillin G | not published | mycelium | MIP Rs 2,216/kg for penicillin G potassium (2026) |
| Chlorination and halogen chemistry | not published | not published | not published | not published | HCl | not published |
How each route works
Nitration and hydrogenation (amino-aromatics, e.g. para-aminophenol)Nitrobenzene is hydrogenated in sulphuric acid over a platinum or palladium catalyst and rearranges to para-aminophenol (Bamberger route), or phenol is nitrated to p-nitrophenol and reduced. Product is crystallised and dried.
cheap at scale; acid effluent
PSU Watch (2026); stoichiometry Condensation and heterocycle synthesisCyanamide, amines and carbonyls are condensed into imidazoles, pyrimidines, biguanides and tetrazoles. Dicyandiamide (for metformin) comes from calcium cyanamide.
commodity-like; China dominant
qualitative Fermentation KSMsPenicillium or Acremonium strains produce penicillin G or cephalosporin C, which are extracted and converted to 6-APA and 7-ACA. See antibiotic_intermediates.
capital-intensive, scale-dependent
Aurobindo (2024); Medical Dialogues (2026) Chlorination and halogen chemistryChlorinated and fluorinated aromatics made from chlorine, HF and aromatics; feeds many APIs and agrochemicals.
shared with agrochemical chains in Gujarat
qualitative Unit economics are indicative ranges from the sources named; costs move with feedstock and energy prices, plant size and region.