The term "chemical factors" refers to any substance or condition that influences a chemical reaction, either by affecting the rate at which it occurs or by altering its outcome. Full definition
«The Biological Control of Chemical Factors in the Environment.» (history.aip.org)
Mineral content in drinking water «is acknowledged to be the major chemical factor affecting taste and likeability of drinking water when no off - flavors are present,» Sain and Dietrich wrote. (sciencedaily.com)
Decades of research in developmental biology have provided clues to how genes in a developing embryo direct different proteins and other chemical factors to create all manner of specialized cells. (seeker.com)