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The item for sale is 5 Fluid Ounces (by volume) of 1% Phenolphthalein (C20H14O4) indicator solution. The compound is dissolved in Ethanol and comes in one 4 Fluid Ounce bottle and one 1 Fluid Ounce Dropper bottle, making for a total of 5 Fluid Ounces of product. The dropper delivers 650 drops per ounce making for a total of 2,600 tests. At pH < 0, the product will be Orange. At pH 0-8.2, the product will be Colorless. At pH 8.2-12, the product will be Purple. At pH > 13, the product will be Colorless. STURDY PLASTIC BOTTLE: Our bottles are made of durable Polypropylene Plastic, which is a natural, translucent, lightweight, durable, and chemically resistant copolymer. The screw-top is completely leakproof. The bottles' round shape makes them a perfect addition to any shelf or travel kit. Every bottle we ship is sealed in plastic with the screw-top shrink-wrapped. HUNDREDS OF USES INCLUDING: pH Indicator / Kastie-Mayer Blood Test / Laxative (Historical) SHIPS FAST FROM CALIFORNIA, USA: Your item will be in the mail the same day you place your order. We ship three times a day, every day of the week. From California, transit time throughout the United States is 2-4 days.