Agar-Agar

Both grades classify under 1302310000 — the HTS does not distinguish by purity grade. However, bacteriological or pharmaceutical-grade agar destined for laboratory or drug manufacturing use may require additional supplier documentation, such as certificates of analysis confirming compliance with USP, EP, or ISO standards. Buyers in the life sciences sector typically specify the required grade in purchase contracts, and importers should ensure supplier documentation supports the declared end use.

Wild Gelidium seaweed — the preferred species for high-gel-strength agar — is subject to harvest quotas in Spain, Morocco, and other key producing countries due to concerns about overharvesting. Supply tightness can occur when quotas are reduced, making supplier diversification and advance contracting important risk management tools. Importers sourcing from China or other Gracilaria-based producers should note that Gracilaria agar typically has lower gel strength than Gelidium agar, which may affect suitability for microbiological applications.