Quicklime[5]

Updated: 2026-10-29

Overview

Imported quicklime customs clearance is a specialized process requiring adherence to chemical import regulations, hazardous material handling protocols, and regional trade compliance. Calcium oxide (CaO) shipments typically arrive in bulk vessels or moisture-proof bags, with purity levels ranging from 75% to 98% for industrial applications. Global trade flows of quicklime involve major producers like China, the US, and Germany, with importers needing to verify material safety data sheets (MSDS), country-specific labeling requirements, and permissible exposure limits for workers during unloading operations.

Physical and Chemical Properties

Quicklime's high reactivity demands careful documentation of thermal stability during transit, as improper storage can lead to heat generation through moisture absorption. The exothermic reaction with water (slaking) produces temperatures exceeding 150°C, requiring UN-certified packaging for safe transport. Standard commercial grades exhibit bulk densities of 1.1-1.4 g/cm³, with melting points around 2,572°C. The material's alkaline nature (pH 12-13 in solution) necessitates corrosion-resistant handling equipment and secondary containment measures at port facilities to prevent environmental contamination.

Main Applications

Over 60% of imported quicklime serves metallurgical processes, particularly steelmaking flux applications where it removes impurities as slag. Water treatment plants use it for pH adjustment and sludge conditioning, while construction sectors rely on it for soil stabilization and mortar production. Emerging applications include flue gas desulfurization (FGD) in power plants and wastewater neutralization, with technical-grade CaO (92%+ purity) commanding premium pricing. Food-grade variants (FCC compliance) require additional import certifications for use in corn processing and baking powder manufacturing.

Safety and Storage

Quicklime shipments require Class 8 hazardous goods declarations and separate storage from acids and organic materials. Port authorities typically mandate covered storage areas with minimum 20 cm pallet clearance to prevent ground moisture contact. CO2 fire suppression systems are recommended over water-based solutions. Workers handling bulk quicklime must wear alkali-resistant PPE including face shields, rubber gloves, and NIOSH-approved N95 respirators. First aid protocols should include eye flushing stations with pH-neutralizing solutions readily available at discharge points.

B2B Procurement Guide

Importers should confirm three key documents: Certificate of Analysis (COA) specifying available lime index (ALI), heavy metal content reports, and moisture percentage. Preferred Incoterms for bulk shipments are typically CIF or DES, with containerized goods often shipped under CPT arrangements. Lead times vary from 30-60 days for bulk maritime shipments from Asia to Western markets. Tariff classifications generally fall under HS 2522.10, with duty rates ranging 1-5% in most jurisdictions, though anti-dumping duties may apply to specific country origins. Spot pricing often includes quality-adjusted premiums for particle size distribution and reactivity testing compliance.