R

Reactants

Quick Reference
Also Known AsStarting 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.

Key Facts

Term Reactants
Synonyms Starting 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.

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