Danival Unrefined Fine Sea Salt, 1 kg

I am very concerned about this Sea Salt, unrefined Sea Salts in the past have been grey in colour. This Sea Salt looks as if it has been processed, it is pure white as if Sulphites have been used in the process. I am severely allergic to Sulphites. Therefore I will not purchase again. I would like the manufacture to make a comment. As I cannot respond to the supplier in the pantry section.