The electron donor in a redox reaction.

A chemical added to an acid to stabilize iron. The injected acid dissolves iron from rust, millscale, iron scales or iron-containing minerals in the formation. Iron can exist as ferric iron [Fe+3] or [..]

A reducing agent is a substance that reduce another substance by supplying electrons to it. Reducing agents cause other substances to be reduced in chemical reactions while they themselves are oxidize [..]

chemical necessary to reduce or separate another chemical. Also called a reducer.

A chemical species which provides electrons for another chemical species. Examples: Metallic zinc, Zn(s), is the reducing agent in the reaction: Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g).

An electron donor in a coupled oxidation-reduction reaction. reflex (re´fleks)

In a reduction reaction (which always occurs simultaneously with an oxidation reaction) the reducing agent is the chemical or substance which 1) combines with oxygen and 2) loses electrons in the reac [..]

the substance in an oxidation-reduction reaction that gives up electrons, and whose oxidation number is increased.

Illustrated Glossary of Organic Chemistry Reducing agent (reductant): In a redox reaction, the reactant that causes the reduction, and is itself oxidized. In the combustion of methane molecular oxygen [..]

Any substance, such as base metal (iron) or the sulfide ion (S2–), that will readily donate (give up) electrons. The opposite is an OXIDIZING AGENT.

Reducing agents are ingredients which during their reaction with oxidizing agents lose electrons. Reducing agents commonly contribute hydrogen to other substances. They can be used as antioxidants sin [..]

AKA: reductant The electron donor in an oxidation-reduction reaction.

Anything, such as iron or the sulfide ion that will give up electrons. This is the opposite of an oxidizing agent.