Synergistic disinfectant compositions having enhanced antimicrobial efficacy and stability, and methods of using the same

A method of disinfecting a surface, comprising applying a synergistic disinfectant composition to the surface, wherein the surface is chosen from metal, ceramic, glass, hard plastic, stainless steel, wood or any combinations thereof;

• or to a surface selected from woven fabric, non-woven fabric, filter media, hospital or surgical linen, hospital or surgical garment, soft-surface medical instrument, soft-surface surgical instrument, soft-surface packaging, paper, fiber, soft plastics, elastomer, food, or any combinations thereof, wherein the synergistic disinfectant composition is in a form of liquid and comprises:
• amino acid based surfactant chosen from sodium sarcosinate of C10-24 fatty acid, sodium glycinate salt of C10-24 fatty acid, sodium glutamate of C10-24 fatty acid, or a combination thereof, in an amount of from about 0.1% to about 20.0% by weight;
• C1-8 organic acid in an amount of from about 0.1% to about 25.0% by weight;
• and
• hydrogen peroxide in an amount of at least 0.1% but less than 5.0% by weight, all based on total weight of the disinfectant composition,
• wherein the method provides a synergistic antimicrobial effect between the amino acid based surfactant and the C1-8 organic acid.