NSF Certification for Lubricants: everything you need to know

The difference between NSF H1, H2 and 3H lies in where each classification permits a lubricant to be used, determined by the risk of food contact at that point, not by the lubricant's physical properties. NSF H1 is required wherever there is any possibility that the lubricant may contact food, however small. NSF H2 may only be used where food contact is completely impossible, typically in enclosed systems or areas physically separated from the production zone. NSF 3H is a separate classification for release agents where direct food contact may occur, with a maximum permitted trace of 100 ppm.
In practice: when in doubt about whether a lubrication point requires H1 or H2, the correct answer is always H1. Using an H2 lubricant in an area where food contact cannot be completely excluded is a non-conformance finding under BRC, IFS and FSSC 22000.

NSF H1 registration applies per individual product, not per product family. A supplier who holds H1 registration for one viscosity grade of an oil does not automatically hold it for other viscosity grades in the same product family. Each product must have its own NSF registration number, verifiable individually in the  NSF White Book.
This matters for audits: an auditor may ask for the NSF registration certificate for the specific product used at a specific lubrication point, not a general certificate for a product range. Interflon registers NSF H1 per individual product and per SKU.

Verifying that a lubricant has NSF H1 registration is straightforward: any registered product can be checked in the NSF White Book., the publicly accessible online registry maintained by NSF International. Search by product name or manufacturer. The registration record shows the product name, registration number, classification category and the registered manufacturer. No contact with the lubricant supplier is required to verify registration.
For audit documentation, the NSF registration certificate and the product's Safety Data Sheet together provide the traceability required under BRC, IFS and FSSC 22000.

NSF 537 and NSF H1 are separate certifications that cover different risks, and both are relevant for a complete food-grade lubrication programme. NSF H1 confirms that a lubricant's ingredients comply with FDA 21 CFR 178.3570 and are safe for use in environments where incidental food contact may occur. NSF 537 confirms that the product contains no PFAS substances, verified by independent laboratory testing with results publicly listed in NSF's registry.
A lubricant can hold both NSF H1 registration and NSF 537 PFAS-free certification. Interflon holds both across its complete food-grade portfolio. For food manufacturers facing PFAS-related retailer requirements or preparing for EU REACH compliance, NSF 537 provides independently verifiable evidence that standard supplier declarations cannot match. Read more about NSF 537 certification.

NSF 537 and NSF H1 are separate certifications that cover different risks, and both are relevant for a complete food-grade lubrication programme. NSF H1 confirms that a lubricant's ingredients comply with FDA 21 CFR 178.3570 and are safe for use in environments where incidental food contact may occur. NSF 537 confirms that the product contains no PFAS substances, verified by independent laboratory testing with results publicly listed in NSF's registry.

A lubricant can hold both NSF H1 registration and NSF 537 PFAS-free certification. Interflon holds both across its complete food-grade portfolio. For food manufacturers facing PFAS-related retailer requirements or preparing for EU REACH compliance, NSF 537 provides independently verifiable evidence that standard supplier declarations cannot match. Read more about NSF 537 certification.

The difference between NSF H1 and ISO 21469 is scope: NSF H1 certifies the ingredient composition of a finished lubricant product, while ISO 21469 certifies the entire manufacturing process, including raw material sourcing, production hygiene, labelling accuracy and traceability, verified through annual third-party audits. A product manufactured under ISO 21469 automatically satisfies NSF H1 requirements, but NSF H1 registration alone does not imply ISO 21469 compliance.

For food manufacturers operating under BRC Global Standard, IFS Food or FSSC 22000, ISO 21469 certification of the lubricant's manufacturing facility provides stronger audit evidence than NSF H1 registration alone. Interflon holds ISO 21469 manufacturing certification and carries NSF H1 registration per individual product.

Which NSF classification belongs in a HACCP plan depends on the assessed risk of food contact at each individual lubrication point. Any point where food, packaging material or a food-contact surface could be reached by lubricant, even indirectly, requires an NSF H1 registered product. NSF H2 products may only be used where a documented risk assessment confirms that food contact is physically impossible.
Your HACCP plan should record, for each lubrication point: the NSF classification required, the specific product used, its NSF registration number, and the lubrication interval. This documentation is what auditors under BRC, IFS and FSSC 22000 will request.

HX-1 is the NSF classification for the raw materials and ingredients used to formulate H1 lubricants, and it matters for food safety audits because a lubricant can only carry valid NSF H1 registration if every ingredient in its formulation is HX-1 approved. This provides full traceability from raw material to finished product.
During audits, particularly under ISO 21469, the HX-1 status of a lubricant's ingredients may be reviewed as part of the manufacturing process assessment. Interflon's raw materials are HX-1 approved. If a competitor cannot confirm HX-1 approval for their raw materials, the basis of their H1 registration should be questioned.

MOSH and MOAH can affect NSF H1 registered lubricants, because NSF H1 registration confirms that a lubricant's ingredients meet FDA 21 CFR 178.3570 but does not independently verify the absence of Mineral Oil Saturated Hydrocarbons (MOSH) or Mineral Oil Aromatic Hydrocarbons (MOAH). Both can be present in mineral-based lubricants, including some NSF H1 registered products. EFSA has flagged MOAH as a potential carcinogen, and major food retailers are increasingly requiring MOAH-free declarations from lubricant suppliers. Read more about MOSH and MOAH in food-grade lubricants. Interflon's food-grade portfolio is MOAH-free across all products.