Concept:Fine chemicals are pure, complex substances manufactured in limited quantities.
Explanation:Fine chemicals are produced in relatively small amounts using specialised processes.
They have a high degree of purity, so option B is incorrect.
They are not necessarily injurious to health, so option A is incorrect.
Storage life is not a defining property, so option D is incorrect.
Therefore, the correct statement is about their small-scale production.
Answer:Option C is correct.