Patent ID: 8591637

Claim:
A composition comprising 0.5 to 100 ppm of a zero-valent metal, a stabilizer compound and water; wherein the zero-valent metal is selected from the group consisting of palladium, silver, cobalt, nickel, gold, copper and ruthenium; wherein the stabilizer compound has the formula wherein R═H or (C 1 -C 6 )alkyl; each R 1 is independently selected from the group consisting of H, (C 1 -C 6 )alkyl and Z; Z=(C 2 -C 6 )alkenyl-Z 1 or (CR 2 R 3 ) a Z 1 ; each R 2 and R 3 are independently selected from the group consisting of H, hydroxyl, (C 1 -C 6 )alkyl, hydroxy(C 1 -C 6 )alkyl, C(O)—(C 1 -C 6 )alkyl, (C 1 -C 6 )alkyl-C(O)—(C 1 -C 6 )alkyl, CO 2 R 4 and NR 5 R 6 ; R 4 ═H, (C 1 -C 6 )alkyl, hydroxy(C 1 -C 6 )alkyl or (C 1 -C 4 )alkoxy(C 1 -C 6 )alkyl; R 5 and R 6 are independently selected from the group consisting of H, (C 1 -C 6 )alkyl and (CR 2 R 3 ) a Z 2 ; Z 1 =C(S)SH, CO 2 H, or C(O)NR 5 R 6 ; Z 2 =C(O)R 4 or CO 2 R 4 ; and a=0-6; wherein at least one R 1 is Z; wherein the composition has a pH of from >7 to 14; and wherein the composition is free of precipitate for 3 months upon storage at 20° C.