The phrase "are known to react" is correct and usable in written English.
It can be used when discussing the behavior or properties of substances, organisms, or phenomena that have been observed to respond in a certain way under specific conditions.
Example: "Certain chemicals are known to react violently when mixed with water, leading to dangerous situations."
Alternatives: "are recognized to respond" or "are observed to interact."
Outsiders are known to react with praise and shock.
Soil collembola in floodplain habitats are known to react dynamically to inundation, showing direct negative effects of inundation as well as rapid regeneration after flooding.
Alkenes are known to react with hydrogen-terminated silicon surfaces to produce robust organic monolayers that are attached to the surface via covalent SiC bonds.
Kaolinite and K-feldspar are known to react to fibrous illite at low temperatures (~ 50 °C) (Bjørkum and Gjelsvik 1988) and increase their reactivity with increasing temperatures (> 70 °C) with illitization being pervasive at temperatures greater than 130 °C (Worden and Morad 2003).
All potassium-oxygen binary compounds are known to react with water violently, forming potassium hydroxide.
"These drugs are known to react very quickly, and some are laced with strychnine," the flyer concludes.
Cement paste is known to react with atmospheric carbon dioxide.
Glycine is known to react readily with other amines under dehydrating conditions12, and it is likely to react with the primary amines of nucleobases.
The addition of sodium nitrite to meat is controversial because nitrous acid, which is produced in the human body when stomach acid reacts with the ingested nitrite ion, is known to react with certain organic compounds to form nitrosamines.
It is clearly not the stuff of Antigone or even Edvard Munch (though screaming with one's hands clamped to one's head is a way that many tragic heroes have been known to react to missing the train).
The acrylic acid group in both PE-r-AA and PP-g-AA is known to react very easily with the epoxy group in PS-GMA, and thus the PE (or PP -graft-PS coPP -graft-PSormed.
