Mother Tinctures are the starting point for dilutions. Authenticity of the raw materials, age, collection, cleaning and drying methods, basic percentage of active ingredients, the quality of alcohol and water, and the percentage used, method used (Percolation or Maceration), the strength of phytochemicals, filteration, bacterial counts are some of the important factors responsible for good quality mother tinctures. These are meticulously followed at Schwabe India, and the distilled and filtered mother tinctures are stored in rooms fitted with expensive explosion resistant and flame-proof electrical fittings of proper intensities to avoid any accident and protect the phytochemicals content in the tinctures. For Details about Acidum Phosphoricum Q, please refer Boericke's Materia Medica