Peptone Water Peptone Water is a minimal growth, non-selective medium used for cultivating non-fastidious organisms, studying carbohydrate fermentation patterns and performing the indole test. Peptone provides the amino acids, peptides, carbohydrates, vitamins, and minerals for bacterial growth, while Sodium Chloride supplies essential electrolytes and maintains the osmotic balance. P16-103 Product Information P16-103 Safety Data Sheet