Using Car Battery Distilled Water for Cosmetics/Pharmaceuticals based on TDS

Based on the information you provided and the previous advice emphasizing the TDS (Total Dissolved Solids) value, distilled water used for car batteries is generally very high purity (low TDS) to prevent damage to the battery. For cosmetic or pharmaceutical use, purity (low TDS) is also important. Referring to the previous advice that stated "If you buy a meter and get the TDS value recommended by the staff, you can use it", if the car battery distilled water you have measures within the TDS value recommended by the staff, it should be usable according to that criterion. While the manufacturing process and packaging standards might differ from water specifically produced for cosmetic/pharmaceutical use, the primary criterion mentioned previously was the TDS measurement.