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Abstract

An aqueous cleaning and disinfecting concentrate comprising A) at lease one reaction product of a) an N-substituted propylene diamine of formula I R.sup.1 --NH--(CH.sub.2).sub.3 --NH.sub.2 (I) in which R.sup.1 is a C.sub.8 -C.sub.18 alkyl group and b) glutamic acid or a glutamic acid derivative of formula II R.sub.2 --O--CO--(CH.sub.2).sub.2 --CH(NH.sub.2)--COOH (II) in which R.sup.2 is hydrogen or a C.sub.1 -C.sub.4 alkyl group, wherein the said reaction product is optionally ethoxylated and/or propoxylated, and is optionally in the form of a salt with an organic or inorganic acid; B) at least one of the following antimicrobially active compounds: i) a quaternary ammonium compound of formula III ##STR1## in which R.sup.3 and R.sup.4 independently of one another represent alkyl radicals containing 1 to 3 carbon atoms or benzyl radicals, or halogenated or alkylated benzyl radicals containing 6 to 22 carbon atoms, and X.sup.-is an anion; ii) a phenol; iii) a biguanide; (iv) a quaternary phosphonium compound of formula IV ##STR2## in which R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are each independently an alkyl, alkenyl, aryl, or alkaryl group having from 1 to 16 carbon atoms, and Y.sup.- is an anion; and C) at least one low foaming surfactant. The invention also relates to the diluted concentrates, and to the method of use of the diluted concentrates, especially for the disinfection of medical equipment.

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First Claim