Natural salt without aditives... Really?

This might seem incredible, but the "natural" salt from EL GRANERO INTEGRAL S.L afirmes that it doesn´t use aditives in the product.Until this point you must say: "oh, it´s all normal a natural product without any aditive. It might be true". But then yo look at the ingredient and alll it puts is salt(what is normal) and Caking sodium chloride also known as E-536 what is clearly an aditive. So just read the ingredients of what you are gonna buy before doing because sometimes we only read the big letters and forget the small one. In this example, if you only read the big letter you are gonna thing you are eating something completly natural while you are eating an aditive.

Caking sodium chloride(E-536): used as caking or anti-caking aditive in salt and in certain types of wine ( E -536 ) .

Threat Threat 
The Caking sodium chloride(E-536) is a safe and stable compound under normal conditions. In highly acidic media releases hydrogen cyanide, a highly toxic gas.
The Caking sodium chloride(E-536) is a safe and stable compound under normal conditions. In highly acidic media releases hydrogen cyanide, a highly toxic gas.