28431010

COLLOIDAL PRECIOUS METALS OF GOLD

28431020

COLLOIDAL PRECIOUS METALS OF SILVER

28431090

OTHER COLLOIDAL PRECIOUS METALS

28432100

SILVER NITRATE

28432900

OTHER COMPOUND OF SILVER

28433000

GOLD COMPOUNDS

28439011

SODIUM AUROUS THIOSULPHATE

28439012

NOBLE METAL SOLUTIONS OF PLATINUM,RHODIUM & PALLADIUM

28439019

OTHER COMPOUNDS

28439020

AMALGAMS