Classification
Product TypeIngredient
Product FormCrystalline powder
Industry PositionFood Additive (Preservative)
Market
Natamycin (INS 235; E235), also known as pimaricin, is a globally traded specialty food preservative used primarily to inhibit molds and yeasts on cheeses and certain cured meat products. Supply is industrial and fermentation-based rather than seasonal, so availability is driven by fermentation capacity, purification capability, and regulatory compliance. International use is anchored by Codex GSFA provisions for defined dairy and non-heat-treated meat categories, while major markets apply jurisdiction-specific conditions (e.g., U.S. FDA use provisions for cheese; EU authorization focused on surface treatment), making specification and labeling management central to trade. Demand is closely linked to dairy and meat processing volumes and to shelf-life/quality needs, but some “clean label” retailer standards can restrict acceptance even where legal use is permitted.
Specification
Physical Attributes- White to creamy-white, almost odourless, crystalline powder (food additive specification description).
- Practically insoluble in water and in oils; slightly soluble in methanol; soluble in glacial acetic acid and dimethylformamide.
- Light sensitivity: analytical preparations/solutions containing natamycin should be protected from direct light.
Compositional Metrics- Identifiers commonly used in trade/specifications include: INS 235; E number E235; CAS 7681-93-8.
- Chemical formula C33H47NO13; formula weight ~665.7.
- Food additive assay/purity specifications are commonly expressed on a dried/anhydrous basis (e.g., JECFA assay on dried basis; U.S. specification on anhydrous basis).
- Contaminant specifications commonly include limits for arsenic and heavy metals/lead (per jurisdictional specs and JECFA).
Grades- Food-grade natamycin typically referenced against FAO/WHO JECFA specifications and applicable national/regional purity specifications (e.g., U.S. 21 CFR identity/spec limits).
Packaging- Typically supplied as a dry powder for food manufacturing use; may be offered as formulated preparations/blends to support dispersion and dosing for surface applications (supplier-dependent).
ProcessingBecause natamycin is practically insoluble in water, end-use applications commonly rely on dispersions or surface treatments rather than uniform incorporation in aqueous phases.Analytical control commonly uses spectrophotometric and/or HPLC methods; U.S. use provisions reference an International Dairy Federation method for measuring natamycin in cheese/cheese rind.
Supply Chain
Value Chain- Aerobic submerged fermentation (Streptomyces spp.) -> downstream recovery/purification -> crystallization and drying -> food-grade quality release testing -> formulation/blending (optional) -> shipment to food manufacturers -> surface application on target foods.
Demand Drivers- Mold/yeast spoilage control needs in cheese and cured/dried meat categories covered by Codex and key regulators.
- Shelf-life extension and appearance/quality protection for products prone to surface fungal growth.
- Compliance-driven demand where natamycin is explicitly authorized with defined conditions of use.
Risks
Regulatory Compliance HighNatamycin is permitted only for specific food categories and under defined conditions and maximum levels that vary across jurisdictions and standards (e.g., Codex GSFA provisions for specific dairy and cured/dried non-heat-treated meat categories; U.S. authorization for application on cheese; EU authorization focused on surface treatment conditions). Misapplication (wrong food category, excessive use, or inadequate control of surface-only conditions where required) can trigger border rejections, product withdrawals, or recalls.Maintain market-by-market approvals and product/category mapping (Codex GSFA + destination regulations), implement validated application controls, and verify compliance via appropriate analytical testing (e.g., HPLC-based methods used in dairy control programs).
Customer Standards MediumBeyond legal compliance, some retailers and private standards restrict natamycin in foods, limiting market access for products positioned as “clean label” even when natamycin use is permitted by regulators.Confirm customer ingredient standards early; keep a natamycin-free formulation pathway available (e.g., alternative mold-control strategies) for restricted channels.
Antimicrobial Resistance Perception MediumNatamycin is a polyene macrolide antimycotic (antibiotic-class compound) and is periodically scrutinized for AMR and microbiome impacts; although major risk assessments have concluded low concern for AMR induction under intended uses, perception risk can drive additional scrutiny, labeling sensitivity, or pressure to reduce use.Document alignment with Codex/JECFA safety evaluations and enforce tight, surface-focused applications consistent with permitted conditions to minimize consumer-facing concerns.
Process Control MediumNatamycin’s practical insolubility in water makes uniform dosing and coverage application-dependent; poor dispersion or uneven surface application can lead to mold breakthrough (quality failures) or localized over-application (compliance risk).Use validated dispersion/formulation approaches, standardize application equipment and contact time, and monitor distribution/coverage with routine QC checks.
Sustainability- Antimicrobial stewardship and antimicrobial-resistance (AMR) perception risk due to natamycin’s classification as an antibiotic/antimycotic, despite risk assessments finding low concern under authorized uses.
- Customer/retailer “clean label” policies that restrict certain preservatives regardless of regulatory authorization.
FAQ
What is natamycin and what is it used for in foods?Natamycin (also called pimaricin; INS 235 / E235) is a fungicidal preservative used to inhibit yeasts and molds. Food additive specifications describe it as a polyene macrolide antimycotic produced by Streptomyces species, and Codex GSFA provisions show its use in defined cheese and certain cured/dried non-heat-treated meat categories.
Which food categories does Codex GSFA list for natamycin use?Codex GSFA Online lists natamycin provisions for multiple cheese categories (including unripened, ripened, processed cheese, cheese analogues, and whey protein cheese) and for cured (including salted) and dried non-heat treated processed meat categories (both whole pieces/cuts and comminuted products). Specific maximum levels and notes are provided by food category in the GSFA Online entry for natamycin (INS 235).
Why is regulatory compliance a major trade risk for natamycin-containing foods?Regulators and Codex define natamycin’s permitted uses by food category and conditions (for example, U.S. rules specify application on cheese with referenced analytical determination methods, and EFSA’s opinion discusses EU authorization focused on surface treatment conditions). If natamycin is used outside allowed product categories or conditions, shipments can fail compliance checks and face rejection or recall risk.