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For procurement, fuming nitric acid logistics are a hidden cost. Its corrosive fumes require specialized tank materials and venting systems. In China, transport permits for fuming grades are stricter, adding lead times. If your process can tolerate 68% acid, the supply chain is simpler and cheaper. Only specify fuming grade when chemistry demands it.
In China, the explosives segment is more regulated than fertilizer. Civil explosive permits and safety stockpiling rules create regional supply quirks. Also, adipic acid plants are increasingly shifting to bio-based routes or catalytic oxidation to cut N2O emissions, which could slowly erode one of nitric acid's premium niches. Keep an eye on environmental policy here.