Demineralized water

Demineralized water for soap and cosmetics

Contaminants found in tap water can cause complications and unwanted reactions in our soap. These include accelerated spores, oxidation, soap scum, reduced cleaning properties, reduced foaming performance, cloudiness in liquid soap, microbial contamination and more. Contaminants increase the risk of oxidation from excess oxygen and contact with metals. This increased risk of oxidation is often visible through signs of going rancid, including the formation of DOS or dreaded orange spots, discoloration and foul odors. Another complication of tap water is the formation of soap scum. Two of the most common contaminants in hard water are calcium and magnesium. When soap and minerals such as calcium and magnesium are combined, a new chemical compound is formed commonly referred to as soap scum. Soap foam is created when the alkali cation is replaced by calcium or magnesium. When the sodium cation of sodium stearate is replaced with calcium found in hard water, it forms calcium stearate, a white, sparingly soluble substance usually seen as a film or residue in showers. Soap residues reduce soap suds, form insoluble compounds, increase the risk of going rancid, and more.

With liquid soap, using tap water can cause a whole new set of complications, in addition to the increased risk of oxidation. By using tap water, the contaminants can react with the soap in our solution and cause problems that are visible from the moment water and soap are combined. It’s incredibly difficult to get a clear liquid soap without the use of undistilled water, which is one of the most overlooked causes of cloudy soap. In addition, contrary to popular belief, the pH of liquid soap alone is not enough to prevent the growth and reproduction of microbes. Using water contaminated with pathogenic bacteria to dilute liquid soap can spread disease. Not all tap water can be considered clean water, and many countries do not have access to safe water.