Ammonium Hydroxide 29% ACS, Reagent Grade High Purity in a one gallon poly bottle. Please note that all orders under four gallons may be shipped as four quarts which exactly equals one gallon. Upon request, this item may be shipped in different sized bottles or drums in varying quantities. Discounts also available for higher quantity orders, feel free to inquire/contact us directly. This item will be shipped only through UPS or FedEx in accordance with USPS Publication 52.