NSF H1 food grade grease: what registration requires

This answer covers lubricants with incidental food contact under the US FDA rule 21 CFR 178.3570 and the NSF registration program. It does not cover release agents and other substances added to food directly, such as 3H products under 21 CFR 172.878, and it does not replace national rules outside the United States or the plant's own HACCP plan.

What does NSF H1 registration cover and require for food grade grease?

NSF H1 registration covers lubricants, greases included, that may touch food incidentally, and it requires an ingredient list that complies with 21 CFR 178.3570 plus an NSF review of intended use and label. An NSF H1 certificate states that the product "is acceptable as a lubricant with incidental food contact (H1) for use in and around food processing areas" (NSF certificate 146621, 2025). The same certificate describes the basis of the review: "The NSF Nonfood Compounds Registration Program is a continuation of the USDA product approval and listing program, which is based on meeting regulatory requirements including FDA 21 CFR for appropriate use, ingredient and labeling review." (NSF certificate 146621, 2025).

The table below decides whether a grease can be used where incidental food contact is possible, one requirement at a time.

The key row is the listing: a grease is registered H1 only while the H1 code and NSF mark appear on the reviewed label and the product name is in the White Book (NSF certificate 146621, 2025).

What does 21 CFR 178.3570 allow in an H1 lubricant?

21 CFR 178.3570 allows an H1 lubricant to be made from three groups of substances: those generally recognized as safe (GRAS) for use in food, those used under a prior sanction or approval, and those on the regulation's own list, each within its listed limitation (eCFR, 2026). The rule is a US FDA regulation for indirect food additives, and its list covers base oils such as mineral oil and castor oil, thickeners, gelling agents, antioxidants, corrosion inhibitors and extreme pressure antiwear additives.

For grease, 21 CFR 178.3570 writes its limits in two ways. Some limits sit in the lubricant: aluminum stearoyl benzoyl hydroxide may be used only as a thickening agent at no more than 10 percent by weight of the mineral oil, and disodium decanedioate only as a corrosion inhibitor at no more than 2 percent by weight of the grease (eCFR, 2026). Other limits sit in the food: mineral oil, petrolatum, polybutene and polyethylene may not add more than 10 ppm to food, and dimethylpolysiloxane above 300 cSt no more than 1 ppm (eCFR, 2026). The rule sets no single limit for every ingredient; BHA, BHT and 12-hydroxystearic acid, for example, are listed without a limitation.

Paragraph (b) sets the condition of use: "The amount used is the minimum required to accomplish the desired technical effect on the equipment, and the addition to food of any constituent identified in this section does not exceed the limitations prescribed." (21 CFR 178.3570(b), eCFR, 2026).

How do you check that a grease is really H1 registered?

You check that a grease is really NSF H1 registered by matching three records: the product label, the NSF Certificate of Registration and the NSF White Book listing. NSF certificates state that "Registration of this product is current when the NSF Registration Mark and Category Code appear on the product label" that NSF reviewed, and the registered product name is in the NSF White Book (NSF certificate 146621, 2025).

1. Read the label. It should carry the NSF Registration Mark and the category code H1, not H2, H3 or 3H.

2. Ask the supplier for the Certificate of Registration. It names the product, the category code, the registration number, the issue date and the guideline edition; certificates issued in 2025 and 2026 cite the 2022 Registration Guidelines (NSF certificate 146621, 2025; NSF certificate 174276, 2026).

3. Search the White Book listing directory by company name, product name or registration number, with the category set to H1, Lubricants with incidental contact (NSF White Book, 2026).

4. Confirm the exact product name. The certificate ties registration to the registered product name, so a similar name in the same product range is not covered by it.

5. If the supplier registered the grease elsewhere, check that register. ELGI names NSF and InS as two organizations that register H1 lubricants internationally and list registered products on their websites (ELGI, 2015).

Keep the certificate and a dated screenshot of the listing with the lubrication schedule, so an auditor can see what was checked and when.

What has changed in food grade grease rules, and what is coming?

As of 2026-10-14, the US rule behind NSF H1 registration, 21 CFR 178.3570, shows no change in the eCFR record after 2017-01-03, while the NSF guidelines, the EHEDG guidance and the ISO 21469 review have moved. The eCFR displays Title 21 as up to date as of 2026-10-09 for this section (eCFR, 2026).

The dated changes and open items are these:

• NSF guidelines: certificates issued in March 2025 and April 2026 register products to the NSF Registration Guidelines for Proprietary Substances and Nonfood Compounds (2022) (NSF certificate 146621, 2025; NSF certificate 174276, 2026). The FDA ingredient rule behind H1 is the same section.

• NSF listings: as of 2026-10-14, the White Book category search offers PFAS-Free (537) and MOAH-Free (538) as categories next to H1 and ISO 21469 (NSF White Book, 2026). They are separate listings, not part of the H1 code, so an H1 certificate alone does not show either claim.

• EHEDG: on 2026-05-18, EHEDG released the fourth edition of Guideline 23 Part 1, Use of H1 and HT1 Registered Lubricants, with guidance on lubricant hygiene and handling, risk assessment, contamination prevention and auditing (EHEDG, 2026).

• ISO: ISO 21469:2006 was last confirmed in 2020. A systematic review closed on 2025-09-03, and as of 2026-10-14 the ISO page shows stage 90.60, close of review, with no confirm or revise decision posted (ISO, 2026).

What is the difference between H1, H2 and 3H lubricants?

H1 lubricants may touch food incidentally, H2 lubricants are for points with no possibility of food contact, and 3H products are release agents used on surfaces that touch food. The NSF category list also has H3, soluble oils, and HT1, heat transfer fluids with incidental contact (NSF White Book, 2026).

The table below shows where each NSF code may be used, so a grease is matched to the right lubrication point.

The key row for grease is H1 versus H2: ELGI states that the term food grade is acceptable only for H1 products and that H2 products are not suitable for food contact (ELGI, 2015). A 3H release agent is not a bearing grease. ELGI notes that a product used to lubricate a bearing, chain or slide falls under H1, and that 3H products designed as equipment lubricants usually carry H1 registration too (ELGI, 2015). H3 and 3H are different codes.

How does ISO 21469 differ from NSF H1 registration?

ISO 21469 certifies the hygiene of how a lubricant is formulated, made, used and handled, while NSF H1 registration confirms that its formulation and label meet the FDA ingredient rule for incidental food contact. ISO 21469:2006, Safety of machinery, Lubricants with incidental product contact, Hygiene requirements, comes from ISO/TC 199 and covers lubricants that can contact products and packaging in the food, food-processing, cosmetics, pharmaceutical, tobacco and animal feed industries (ISO, 2026). It does not apply to substances used as product additives or in direct product contact, and it does not address occupational health and safety (ISO, 2026).

The practical difference is who is assessed and how often. H1 registration reviews ingredients, use and label against FDA 21 CFR (NSF certificate 146621, 2025). ELGI describes ISO 21469 as the international standard programme for H1 lubricant producers, under which formulation, manufacture, use and handling are externally assessed, and states: "Assessment is annually, so current certification can be assessed." (ELGI, 2015). ELGI adds that the certification "provides an assurance of process and product quality beyond H1 registration" (ELGI, 2015).

The NSF White Book lists ISO 21469 as its own category, 21469, separate from H1 (NSF White Book, 2026). Check each claim against its own listing. ISO 21469:2006 remains the current edition as of 2026-10-14, with its systematic review closed on 2025-09-03 (ISO, 2026).

When should you call a food safety specialist about H1 grease?

Call a food safety specialist about H1 grease when the label, certificate and White Book listing disagree, when grease reaches product in more than incidental amounts, or when a non-H1 product has been used where food contact is possible. The HACCP team owns the decision; ELGI calls the HACCP assessment the ultimate guide to where H1 lubricants are needed (ELGI, 2015).

Bring in your food safety lead or an outside specialist in these cases:

• An H2 or unregistered grease was applied at a point where the lubricated part may be exposed to food. H2 products are acceptable only where there is no possibility of the lubricant or lubricated part contacting edible products (NSF certificate 174276, 2026).

• A leak, drip or over-greasing puts visible lubricant on product. 21 CFR 178.3570 assumes the minimum amount needed for the technical effect (eCFR, 2026).

• A customer asks for ISO 21469, PFAS-Free or MOAH-Free evidence that an H1 certificate does not show.

• The plant plans to move every lubrication point to H1. ELGI points to EHEDG Document 23 for changeover guidance and recommends dedicated lubrication and filling equipment, color coded for example, to avoid cross contamination (ELGI, 2015).

• A 3H release agent is used on a machine part, or an H1 grease is used as a release agent.

Lubinpla, an applied AI company that structures technical reasoning for specialty chemicals, works such a case from your own TDS, SDS and registration certificates and returns one cited document for your review.