Here's how to read the list of ingredients:
Real soap is made from oils and potassium hydroxide instead of sodium hydroxide, as potassium hydroxide or potassium lye as it is also called, creates soft soap crystals. Soap therefore has a list of ingredients with INCI names that begin with: Potassium. The names indicate that the soap's content is fatty acid salts (soap) saponified with potassium hydroxide and the respective oil.
It is therefore not a question of a "foreign chemical" being added but simply the specific name of the soap formed and which oil/fat it is made from. In everyday speech we say soap, in "chemistry language" soap made from rapeseed oil is called: Potassium canolate. And Aqua, that's just plain water.
Our soaps' Ingredients
Refill kitchen 30ml
Contains Aqua: >30% soap, Potassium canolate (saponified rapeseed oil)
Refill: All-purpose cleaner, Pine - Apple - Bathroom - Christmas - Lilac - Citrus
Contains: Aqua, >30% soap, Potassium canolate (saponified rapeseed oil), parfum
Solid soap original - kitchen 230ml
Contains: Aqua, >30% soap Potassium canolate (saponified rapeseed oil)
Solid soap Pine 230ml
Contains: Aqua, >30% soap Potassium canolate (saponified rapeseed oil), parfum
Liquid soap kitchen - original 500ml
Contains: Aqua, 15-30% soap Potassium canolate (saponified rapeseed oil)
Liquid soap 500ml Pine - Bathroom - Apple - Christmas - Lilac - Citrus
Contains: Aqua, 15-30% soap Potassium canolate (saponified rapeseed oil), parfum
Liquid soap - original 2500ml
Contains: Aqua, 15-30% soap Potassium canolate (saponified rapeseed oil)
Liquid soap 2500ml - Pine
Contains: Aqua, 15-30% soap Potassium canolate (saponified rapeseed oil), parfum
pH value for all soaps: pH 10.6