Potassium hydroxide

Selecting the correct grade is critical for process efficiency. Industrial Grade (90-95%) is typically used for fertilizers, soaps, and detergents. Food Grade must comply with FCC (Food Chemicals Codex) standards for use as a pH adjuster. For electronics or laboratory use, ACS/Reagent Grade is required to ensure minimal metallic impurities. Always request a Certificate of Analysis (COA) to verify the actual KOH content and impurity levels like carbonates and chlorides.

Potassium Hydroxide is commonly available in flakes, pellets, or liquid solution (45-50%). Flakes are the most common for cross-border trade due to lower shipping costs per unit of active ingredient. Ensure the product has high solubility and low heavy metal content (Pb, As). For liquid forms, verify the specific gravity to ensure concentration consistency. Packaging must be air-tight and moisture-proof because KOH is highly hygroscopic and will absorb CO2 from the air, turning into potassium carbonate.

As a highly corrosive substance (UN1813 for solids, UN1814 for liquids), it must have a valid SDS (Safety Data Sheet) compliant with GHS standards. For international trade, ensure the supplier provides IMDG-compliant packaging (usually UN-rated plastic drums or woven bags with PE liners). If sourcing from China via Made-in-China.com, verify if the manufacturer holds ISO 9001 for quality management and ISO 14001 for environmental compliance, as chemical production is strictly regulated.

Request a pre-shipment inspection (PSI) by third parties like SGS or Intertek. Focus on the Carbonate (K2CO3) content; high carbonate levels indicate poor storage or aging. For liquid KOH, check for clarity and color—it should be a clear, colorless liquid. Any turbidity suggests contamination or precipitation of impurities.

Potassium Hydroxide is classified as Class 8 Dangerous Goods (Corrosive). You must use a freight forwarder certified to handle DG (Dangerous Goods) cargo. Shipping requires specialized containers and strict adherence to the International Maritime Dangerous Goods (IMDG) Code. Ensure the supplier provides a Dangerous Goods Declaration and that the packaging passes the Drop Test and Stacking Test to prevent leakage during transit.

Use secure payment methods and prioritize suppliers on Made-in-China.com who have undergone on-site audits. It is highly recommended to use Trade Assurance or Letter of Credit (L/C) for large volumes. Never pay 100% upfront to a new supplier; a standard 30% deposit and 70% against the Bill of Lading (B/L) after a successful third-party lab test is a safer strategy.

Check your local import permit requirements for hazardous chemicals. Some countries require a Chemical Import License or specific environmental clearances. Ensure the HS Code (typically 28152000) is correctly declared to avoid customs delays or misclassification fines. Be aware of anti-dumping duties that may apply to chemical products originating from specific regions.

The price of KOH is heavily influenced by the cost of Potassium Chloride (potash) and electricity. When negotiating, consider formula-based pricing linked to market indices or commit to annual volume contracts to secure a fixed margin. Discuss lead times clearly, as chemical production schedules can be affected by environmental inspections in the manufacturing country.