No declaration of ingredients

Entkalen with lactic acid to be the best and most gentle method, they say. My new fully automatic machine was a plastic cartridge with descaler in. It was 100ml Füssigkeit named "NOKALK". On the cartridge was found on the bottom that it is 30-50% lactic acid.
This article I wanted to reorder. Amazon offers this Delonghi articles in various containers. In the photos, the name "Descaler" (Entkaler) or "Nokalk" is indicated. My 4-Sparpack for 24 euros was called "Nokalk". The package did not come with Nokalk print. His name was now "Descaler". On the individual portions but was no longer a reference to the ingredients!
I now have lactic acid or not? There are also other substances to Entklaken. Amoniumsulfit or citric acid, which could, however, be much cheaper. The lack of declaration disconcerted me very much. Especially since there is the Delonghi Entkaler apparently also much more expensive to buy on Amazon. See:
5 DELONGHI Entkalker NOKALK 2x100 mL for about 50 euros. And there is it loud Photo NOKALK.