Cyanuric Acid Reagent 16 oz

The “Cyanuric Acid Reagent” you referenced is a testing chemical, used as part of a test kit to measure the level of cyanuric acid (CYA)—also called stabilizer or conditioner—in pool water. It’s not a sanitizer; it doesn’t kill bacteria or algae itself. Instead, it helps you determine how much stabilizer is in the water so you can properly adjust your chemicals.

More Detail: What It Does & Why It’s Important

Cyanuric acid is used to protect free chlorine from being destroyed by sunlight. It “stabilizes” the chlorine so that it lasts longer in outdoor pools.

However, too much CYA can weaken chlorine’s effectiveness (“chlorine lock”).

The reagent reacts with a water sample, causing a cloudy or colored change that can be measured (often by turbidimetric or “disappearing dot” methods) to find the CYA concentration.

Typical Features & Specs

Volume: 16 ounces

Form: Liquid reagent, often used with test kits that have sample vials

Use: Add to a measured water sample; a color reaction indicates the CYA concentration

Storage: Keep in a cool, stable environment; keep sealed to avoid contamination

Compatibility: Works with specific test kits (e.g. Taylor CYA test kits)

Shelf Life: Usually formulated to last 1 year or so under good storage