During the milling and refining of sugar, various ingredients are used that may be chametz. These are filtered out during the final refining of the sugar and therefore halachically the sugar remains permissible. However sugar may be packed on the same lines as actual chametz.
The Kashrut Authority has supervised the production of special batches of sugar bearing the following batch numbers on the closing flap.
Sunshine White Sugar
In 2kg retail sizes
In 25kg bags
Sunshine Caster Sugar - In 25kg bags
It contains only Kosher Le Pesach ingredients and is Kosher for Pesach Le-Mehadrin and relies on no leniencies. If supervised sugar is unavailable then the leniency may be used and any white sugar or caster sugar may be used. All sugars must be purchased before Pesach.
Warning: Pure Icing Sugar and Icing Sugar Mixture may contain actual chametz and may not be used for Pesach.