The phrase "a substantial demand for" is correct and usable in written English.
It can be used when discussing the level of interest or need for a particular product, service, or resource in a market or context.
Example: "There is a substantial demand for renewable energy solutions as more companies seek to reduce their carbon footprint."
Alternatives: "a significant need for" or "a considerable request for".
There is certainly nothing in petitioner's telegram 10 which makes out a substantial demand for an executive session.
Federal Express based Zapmail on the assumption that there would be a substantial demand for four-hour delivery of documents faxed from FedEx center to FedEx center.
The new transport companies not only enabled factories to obtain raw materials and to ship finished products over increasingly large distances, but they also created a substantial demand for the output of the new industries.
Prof John Perkins, chief scientific adviser at the Department for Business, Innovation and Skills has identified "a substantial demand for engineers".
Luxury brand outlet malls first appeared in the US and Japan; now Asian consumers are exhibiting a substantial demand for luxury goods and luxury brand outlet malls (Kim et al. 2009).
"There will always be a substantial demand for alcoholic beverages, and when you cut something that's legal and could be regulated, they're going to make their own booze, even though some people don't care at all about beer," said Ade Putri, the co-founder of Beergembira, a beer enthusiast and education group.
The rapid increase in the emergence of novel chemical substances presents a substantial demands for more sophisticated computational methodologies for drug discovery.
A substantial demand exists for enzymes for industrial and medical applications in the global market; thus, enzyme function annotation is receiving considerable attention because it offers reductions in the cost of chemical processes.
Thus, there is a substantial demand existed for thermal engineers to realize this blockage effect systematically.
Gulfstream has been very impressed with this technology, and it has done a market analysis exposing a substantial demand during the next ten years for, of all things, a supersonic corporate jet.
In the developing countries, there is currently a substantial demand among farmers and other project recipients for quality breeding stock.
