Topical Minoxidil is primarily available in 2% and 5% concentrations, with the 5% variant being the industry standard for male pattern baldness. Buyers should specify the solvent base, typically a mixture of propylene glycol, ethanol, and purified water. For sensitive skin markets, sourcing 'Propylene Glycol-Free' (PG-Free) or foam formulations is highly recommended to reduce the risk of contact dermatitis. Ensure the Active Pharmaceutical Ingredient (API) purity is ≥99% as verified by a Certificate of Analysis (COA).