• Swimming pool sanitizer in quick-dissolving granular form
• Active ingredient is sodium dichloro-s-triazinetrione dihydrate at 99% w/w, giving 55.0–56.0% active chlorine
• A chlorinated isocyanurate, so it contributes cyanuric acid (stabiliser) to the water
• Near-neutral in solution (pH 6.5 at 1%) and highly soluble (26.25 g/100 g at 25°C)

Water chemistry target

Regal®’s Canadian Pool Care Guide states: “A free chlorine level of 1-3 ppm should be maintained in the pool at all times.”

Safety, handling and storage (from the Regal Elite Chlor Granules Canadian Safety Data Sheet, issued 23 April 2024)

• Signal word: DANGER. H302 — Harmful if swallowed. H314 — Causes severe skin burns and eye damage. H318 — Causes serious eye damage. H335 — May cause respiratory irritation. H410 — Very toxic to aquatic life with long lasting effects.
• Wear proper protective equipment to avoid contact with eyes or skin. Do not breathe vapours or dust. Do not eat, drink or smoke when using this product. Use only in an area with appropriate exhaust ventilation.
• Storage: “Keep product in tightly closed container when not in use. Store in a cool, dry, well-ventilated area away from heat or open flame. Keep storage room temperature under 40 degrees C. Do not store with water, oxidizing agents, alkalies, grease, reducing agents and acids. Keep out of reach of children.”
• Conditions to avoid: heat, direct sunlight, water and moisture.
• Incompatible materials: acid, alkali, other chlorine agents, oils/fats and flammable materials. Never mix this product with any other pool chemical.