Particulate composition wherein at least a part of the particles present in said composition comprises (i) at least 5% (w/w) of a hygroscopic aminopolycarboxylate chelating compound A and (ii) (a) a further aminopolycarboxylate chelating compound B, which has a chemical structure different from the chelating agent A, compounds A and B independently are selected from the group comprising 2-(hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentacetic acid (DTPA), methylglycine- N,N- diacetic acid (MGDA), glutamic acid- N,N -diacetic acid (GLDA), iminodisuccinic acid, hydroxyiminodisuccinic acid (HIDS), ethylenediaminedisuccinic acid (EDDS), aspartic acid- N,N -diacetic acid (ASDA), salts thereof, or mixtures thereof with the proviso that if the aminopolycarboxylate chelating compound A is GLDA and no silicate is present in the composition, the aminopolycarboxylate chelating compound B is not MGDA, or (b) a mixture of said aminopolycarboxylate chelating compound B and a silicate, wherein the silicate is an alkali metal silicate of the general formula M 2 O:nSiO 2 wherein M represents an alkali metal and n is in the range of from 1 to 3.5, and wherein the combined amount of aminopolycarboxylate chelating compound(s) in said particles is equal to or above 40 % (w/w), based on the weight of the particles, and the amount of silicate ranges from 0 to 40 % (w/w), based on the weight of said particles, and wherein the ratio of the amount of silicate to the amount of combined aminopolycarboxylate chelating compounds, both based on the weight of the particles, is less than 0.75 and wherein the hygroscopicity of compound B is less than the hygroscopicity of compound A. (i) at least 5% (w/w) of a hygroscopic aminopolycarboxylate chelating compound A and (ii) (a) a further aminopolycarboxylate chelating compound B, which has a chemical structure different from the chelating agent A, compounds A and B independently are selected from the group comprising 2-(hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentacetic acid (DTPA), methylglycine- N,N- diacetic acid (MGDA), glutamic acid- N,N -diacetic acid (GLDA), iminodisuccinic acid, hydroxyiminodisuccinic acid (HIDS), ethylenediaminedisuccinic acid (EDDS), aspartic acid- N,N -diacetic acid (ASDA), salts thereof, or mixtures thereof with the proviso that if the aminopolycarboxylate chelating compound A is GLDA and no silicate is present in the composition, the aminopolycarboxylate chelating compound B is not MGDA, or (b) a mixture of said aminopolycarboxylate chelating compound B and a silicate, wherein the silicate is an alkali metal silicate of the general formula M 2 O:nSiO 2 (a) a further aminopolycarboxylate chelating compound B, which has a chemical structure different from the chelating agent A, compounds A and B independently are selected from the group comprising 2-(hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentacetic acid (DTPA), methylglycine- N,N- diacetic acid (MGDA), glutamic acid- N,N -diacetic acid (GLDA), iminodisuccinic acid, hydroxyiminodisuccinic acid (HIDS), ethylenediaminedisuccinic acid (EDDS), aspartic acid- N,N -diacetic acid (ASDA), salts thereof, or mixtures thereof with the proviso that if the aminopolycarboxylate chelating compound A is GLDA and no silicate is present in the composition, the aminopolycarboxylate chelating compound B is not MGDA, or (b) a mixture of said aminopolycarboxylate chelating compound B and a silicate, wherein the silicate is an alkali metal silicate of the general formula M 2 O:nSiO 2