Patent ID: 7488708

Claim:
A two-part hard surface treatment composition which is formed by the admixture of two aqueous compositions, comprising: (a) an aqueous alkaline composition comprising 0,1-10% wt. of a bleach constituent; 0.1-5% wt. of an alkaline constituent; optionally 0.1-8% wt. of a gas releasing constituent; 0.1-3% wt. of an amine oxide nonionic surfactant; with, (b) an aqueous acidic composition comprising: 0.1-10% wt. of a peroxide constituent, 0.1-15% wt. of an acid constituent which includes sulfamic acid, which compositions are kept separate, but which are admixed immediately prior to use or upon use to form a foamed hard surface treatment composition, characterized in that: the foamed hard surface treatment composition generates not more than 1 parts per million of chlorine gas when measured when measured during a 15 to 30 minute time interval within the first 60 minute interval following mixing of the (a) aqueous alkaline composition with the (b) aqueous acidic compositions, and wherein the formed hard surface treatment composition has a pH of 4 or less and demonstrates antimicrobial efficacy against one or more microorganisms selected from: S.aureus, E.coli, Ps.aeruginosa, and E.hirae .