This is an acidic hair soap (pH 4.7), closest to the isoelectric point of hair. It's gentle on hair and scalp, and uses ECA, a highly biodegradable surfactant (decomposes into water and air). Product Name: Lebel 4.7 Acidic Hair Soap Nourishing 1200ml Contents: 1200ml Manufacturer: Lebel Brand new, unused, and unopened. Received this from an acquaintance this month. Selling because I don't use it.