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Safety Data Sheets / AGent Pool & Spa

AquaGUARD Balance Four

Sodium hydrogen sulphate (sodium bisulphate) · NaHSO₄

Signal wordDANGERTransportNot dangerous goodsPoisons scheduleNot Scheduled (SUSMP main list)SDS version2026.02 · July 2026

Hazards

Corrosive pictogram
Corrosive
  • H318Causes serious eye damage.
Full GHS classification
  • Serious Eye Damage/Eye Irritation Category 1 — H318

Poisons schedule

Not Scheduled (SUSMP main list)

Used for

Swimming pool and spa pH / alkalinity reducer (dry acid).

Never

Not for unprotected domestic / consumer use. Forms a corrosive acid on contact with water.

Handling

Appearance
Solid — white crystals
pH
1.3 (1% solution) — strongly acidic
Keep away from
Strong bases; oxidising agents; metals; water (forms corrosive acid); ignition sources. Store away from incompatible materials (see Section 10).

Also known as

Sodium hydrogen sulphate; sodium bisulphate; dry acid; pH reducer; sodium acid sulphate

Summary only. The PDF is the Safety Data Sheet: read it before handling, storing or disposing of this product, and keep it with the product.