OxyChem potassium hydroxide (KOH) flake, also known as caustic potash, is a high-purity dry pH-up agent for large-scale hydroponic and fertigation operations. With a minimum of 90% KOH and a fertilizer grade of 0-0-75, it delivers the highest potassium concentration of any common dry pH-up agent. Produced via a non-mercury cell process and meeting ANSI/AWWA B511-10, USP/NF, and FCC standards, it is suitable for food-grade and regulated production environments.

Why Potassium Hydroxide for pH Up?

KOH reacts rapidly and exothermically with water, making it highly effective for aggressive pH correction and building high-concentration stock solutions. Every dose contributes potassium — a primary macronutrient — directly to your nutrient solution. The 50 lb. bag provides bulk commercial supply for large-scale fertigation systems.

Key Specifications

• Brand: OxyChem
• Chemical Formula: KOH
• Fertilizer Grade: 0-0-75
• Minimum Purity: 90% KOH
• Form: Flake
• Solubility: Fully water soluble
• Production: Non-mercury cell process
• Standards: ANSI/AWWA B511-10, USP/NF, FCC
• Net Weight: 50 lb.
• Shipping: Ground shipping only

Recommended Uses

• Building high-concentration pH-up stock solutions for large injector systems
• Aggressive pH correction in large-scale recirculating hydroponic systems
• Commercial greenhouse and fertigation operations
• Food-grade and regulated production environments

Application Notes

• Always add flake slowly to cold water — never add water to flake
• Reaction is exothermic — use heat-resistant containers
• Prepare as a stock concentrate; do not dose dry product directly into the reservoir
• Titrate in small increments and allow system to equilibrate before re-testing
• Full PPE required: nitrile gloves, safety glasses, and face shield

Safety

CORROSIVE — Hazardous Material. UN1813, Potassium hydroxide, solid, Class 8, PGII. Wear full PPE at all times. Store in a sealed container away from moisture and incompatible materials. Ground shipping only — not eligible for air freight.