Classification
Product TypeIngredient
Product FormPowder (food additive grade)
Industry PositionFood Additive (Anti-caking / Antifoaming / Carrier)
Market
Amorphous silicon dioxide (INS 551 / E551) is used in Hong Kong as a food additive (notably as an anti-caking agent, and also as an antifoaming agent/carrier under Codex GSFA provisions). Hong Kong functions primarily as an import-dependent consumer and re-export hub rather than a manufacturing origin for this mineral-based additive. Compliance emphasis is typically on documentation (food-grade specification/CoA) and correct downstream use and labelling in prepackaged foods. For products sold in Hong Kong that contain this additive, labels are expected to declare the additive by functional class plus its specific name or its INS/E-number under Hong Kong’s labelling rules.
Market RoleImport-dependent consumer and re-export market
Domestic RoleImported food-grade additive supplied via local importers/distributors to food manufacturing, repacking and foodservice supply chains; regulatory focus is on food safety and labelling compliance for foods sold in Hong Kong.
Market GrowthNot Mentioned
Risks
Regulatory Compliance HighIf foods sold in Hong Kong contain amorphous silicon dioxide (INS 551) but the additive is not declared on the label in the required manner (functional class plus specific name or INS/E-number), products can face non-compliance enforcement actions, including sale disruption and costly relabelling or withdrawal.For any prepackaged food using this additive, validate label ingredient lists against Cap. 132W requirements (functional class + specific name or INS/E-number) before import/sale; keep technical dossiers and CoA available for due diligence.
Documentation Gap MediumIncomplete shipping and supporting documentation (e.g., missing invoice/packing list/transport documents or other supporting documents requested during control) can delay Customs clearance and disrupt distribution schedules.Use a pre-shipment document checklist aligned to Hong Kong Customs clearance references; ensure consistent product naming and quantities across invoice, packing list and transport documents.
Food Safety MediumBuyer or regulator concerns may arise if the ingredient cannot be demonstrated as food-grade silicon dioxide, amorphous (INS 551) with appropriate specifications; lack of credible specification alignment can trigger rejection by customers and reputational risk.Require suppliers to provide JECFA/Codex-aligned specifications and a current CoA per lot; implement incoming QC checks appropriate to intended food use.
Logistics LowOcean freight disruptions and container-rate volatility can increase landed costs and extend lead times for imported additives, affecting inventory planning for local manufacturers and distributors.Hold safety stock for key customers, diversify origin/supplier options, and contract freight where feasible for stable lanes into Hong Kong.
FAQ
How should amorphous silicon dioxide (INS 551 / E551) be declared on labels for prepackaged foods sold in Hong Kong?Hong Kong’s labelling rules require food additives in the ingredient list to be declared by their functional class and then either the additive’s specific name or its INS number (and the INS number may be shown with an E/e prefix).
Does Hong Kong levy import tariffs on food-grade amorphous silicon dioxide?Hong Kong is a free port and does not levy Customs tariffs on imports and exports (with excise duties limited to specified dutiable commodities such as liquors and tobacco).
What Codex identifier and functions are associated with amorphous silicon dioxide as a food additive?In the Codex system, amorphous silicon dioxide is INS 551 (commonly shown as E551) and is listed with functions including anticaking agent, antifoaming agent and carrier in the GSFA online database.