Food-grade lubrication is one of the most regulated areas of industrial chemistry. A lubricant additive used on food processing equipment must pass a completely different standard than its industrial counterpart — and the most important of those standards is NSF HX1 certification.
What Is NSF HX1?
NSF International’s HX1 category covers lubricant additive components used in formulating H1-registered lubricants — lubricants that may have incidental contact with food or food packaging during processing. Every ingredient in an H1 lubricant must carry its own HX1 registration. If one component isn’t HX1-certified, the finished lubricant cannot carry the H1 designation.
This is a critical distinction for lubricant formulators: you can’t build a food-grade grease from non-food-grade ingredients and just call it H1. Every additive — the base oil, thickener, antioxidant, EP additive, and any performance booster — must be individually HX1-registered.
Why Most EP Additives Fail the Food-Grade Test
Conventional extreme pressure additives rely on sulfur, chlorine, or phosphorus compounds that deliver excellent EP performance — but fail food safety requirements. Chlorinated paraffins are restricted under multiple food safety frameworks. Sulfurized fats and olefins introduce heavy metal concerns. Zinc dialkyldithiophosphate (ZDDP), the workhorse AW additive, is not HX1-registered.
This leaves food-grade lubricant formulators with a narrow field of viable EP/AW options — and that’s precisely where Desilube’s NSF HX1-certified additive grades fill the gap.
Desilube’s HX1-Certified EP/AW Additives
Three Desilube grades carry NSF HX1 certification for use in food-grade lubricant formulations:
- Desilube 88 — High-performance EP/AW additive for food-grade greases, oils, and metalworking fluids. Replaces chlorinated paraffins and sulfurized olefins. Ecolabel ready, registered on the LuSC list. Dosage: 1–15% by weight.
- Desilube 98F — EP/AW additive for stable dispersions in oils, greases, and solvents. High synergy with MoS₂. Ecolabel ready, registered on the LuSC list. Dosage: 1–15% by weight.
- Desilube 99FEL — Liquid additive package combining Desilube 88 and 98F in a ready-to-blend concentrate. Effective at 0.5–3% treat rates; synergistic extender for MoS₂.
Building an H1-Compliant Grease
A food-grade grease using Desilube 88 or 98F as the EP/AW component would typically combine:
- HX1 base oil (white mineral oil or food-grade PAO)
- HX1-registered thickener (aluminum complex or calcium sulfonate)
- HX1 antioxidant package
- Desilube 88 or 98F at 2–5% loading — providing EP, AW, and anti-friction performance
The result is a fully H1-compliant extreme pressure grease suitable for food processing conveyors, oven chains, and packaging equipment — without chlorinated paraffins, sulfurized compounds, or PTFE.
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