Fertilizer calcium nitrate

Buyers should prioritize purity levels, typically requiring a Nitrogen content of approximately 15.5% (comprising both ammoniacal and nitrate nitrogen) and Calcium (CaO) content around 26%. It is crucial to verify the water solubility, as high-quality fertilizer must be 100% water-soluble for use in fertigation and foliar spray systems without clogging nozzles. Additionally, check the pH value (usually 5.0-7.0) and ensure the heavy metal content (Lead, Arsenic, Cadmium) falls well below international safety thresholds.

Agricultural grade often contains a small amount of Ammonium Nitrate (forming a double salt) to improve stability and handling, whereas industrial grade is typically anhydrous or crystal-form for chemical reactions. For B2B buyers, the granular appearance is key; agricultural variants are often white round granulates treated with anti-caking agents to prevent clumping during long-term storage in humid environments.

Suppliers must provide a Certificate of Analysis (COA) for every batch. Depending on the destination, you may require REACH registration for the EU market or ISO 9001:2015 for quality management. Furthermore, because Calcium Nitrate is an oxidizer, it must comply with the Globally Harmonized System (GHS) for labeling and packaging, and suppliers should provide a comprehensive Material Safety Data Sheet (MSDS).

Calcium Nitrate is primarily used to prevent physiological disorders in crops, such as blossom end rot in tomatoes or bitter pit in apples. It functions by providing immediately available nitrate nitrogen and soluble calcium, which strengthens cell walls and improves shelf-life and fruit quality. It is the preferred choice for hydroponic systems and greenhouse cultivation due to its rapid absorption rate compared to other calcium sources.

Calcium Nitrate is classified under UN Number 1454 (Class 5.1 Oxidizing Substances). It must be stored in a cool, dry, and well-ventilated area, away from flammable materials and reducing agents. During cross-border transit, ensure the use of moisture-proof PP/PE bags (typically 25kg or 1000kg jumbo bags). Buyers should confirm the supplier's experience in handling dangerous goods (DG) containers to avoid port rejection or fines.

To mitigate risk, utilize third-party inspection services (such as SGS or Intertek) to conduct pre-shipment inspections for weight, packaging integrity, and chemical composition. When sourcing via Made-in-China.com, prioritize Audited Suppliers who have undergone on-site verification. It is recommended to use secured payment terms or Letters of Credit (L/C) for large-scale bulk orders to protect your capital.

Fertilizer prices are highly sensitive to raw material costs (ammonia and limestone) and energy prices. Negotiate based on formula-based pricing or lock in volumes during the off-season to secure lower rates. Always request a tiered pricing structure where the unit price decreases as the volume reaches container-load increments (e.g., 20ft FCL vs. 100mt+).

Be aware of export duties or quotas that the exporting country may impose to ensure domestic supply, which can lead to sudden price hikes or shipment delays. Additionally, verify the import registration requirements in your own country; many nations require fertilizers to be registered with the Ministry of Agriculture before they can clear customs, a process that can take several months.