AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/693-reactants
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Quick Reference
Also Known As
Starting materials, reagents, substrates (in enzyme reactions)
What is Reactants?
The starting materials consumed in a chemical reaction, appearing on the left side of a chemical equation. Reactants are transformed into products through bond breaking and forming processes. The amounts of reactants determine the theoretical yield of products.
Properties & Characteristics
Reactants are the starting materials consumed during a chemical reaction to form products. They appear on the left side of a chemical equation. The stoichiometric coefficients of reactants indicate the molar ratios in which they are consumed. A limiting reactant is fully consumed before others.
Uses & Applications
Identifying reactants is fundamental to balancing chemical equations and calculating theoretical yields. In industrial chemistry, managing reactant feed rates controls product output and minimises waste. Reactant purity directly affects product quality in pharmaceutical synthesis.
Safety Information
Reactants may be flammable, corrosive, toxic, or explosive and must be handled according to their safety data sheets. Proper storage segregation of incompatible reactants prevents hazardous reactions.
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsStarting materials, reagents, substrates (in enzyme reactions)
Frequently Asked Questions
The starting materials consumed in a chemical reaction, appearing on the left side of a chemical equation. Reactants are transformed into products through bond breaking and forming processes. The amounts of reactants determine the theoretical yield of products.
Identifying reactants is fundamental to balancing chemical equations and calculating theoretical yields. In industrial chemistry, managing reactant feed rates controls product output and minimises waste. Reactant purity directly affects product quality in pharmaceutical synthesis.
Reactants may be flammable, corrosive, toxic, or explosive and must be handled according to their safety data sheets. Proper storage segregation of incompatible reactants prevents hazardous reactions.
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
