NSF Food-Grade Lubricant Ratings

NSF International maintains a registration program for lubricants used in food processing facilities. This program helps food processors identify lubricants formulated with ingredients acceptable for their intended use in food-related applications.

Understanding H1 Registration

H1 registration indicates that a lubricant:

Is formulated from ingredients listed in FDA 21 CFR 178.3570
Or contains only GRAS (Generally Recognized as Safe) substances
May be used where incidental food contact may occur

H1 does NOT mean:

The lubricant is “food safe” for consumption
Any amount of food contamination is acceptable
The lubricant is necessarily better performing than industrial equivalents

H1 Ingredient Restrictions

FDA 21 CFR 178.3570 limits ingredients to specific:

Base oils: White mineral oil, PAO, some other synthetics
Thickeners: Aluminum stearate, certain other soaps
Additives: Limited antioxidants, corrosion inhibitors

This restricts formulator options, potentially affecting performance compared to industrial lubricants.

Maximum Contamination Levels

If incidental contact occurs, food must not be adulterated. The generally accepted limit is 10 ppm (parts per million) of lubricant in food product. This is an upper limit, not a target—good manufacturing practice aims for zero contamination.

Documentation Requirements

Food processors should:

Maintain current SDS for all lubricants
Verify NSF registration status (registrations can be withdrawn)
Document lubricant use locations
Have procedures for addressing contamination events

International Equivalents

Standard	Region	Equivalent to
NSF H1	International	FDA incidental contact
ISO 21469	International	Similar to H1
Halal/Kosher	Various	Additional requirements

Classification Table

Category	Description	Food Contact	Maximum Contamination
H1	Lubricants with incidental food contact	Possible	10 ppm
H2	Lubricants with no food contact	Not permitted	N/A
H3	Soluble oils / edible oils	Direct contact OK	N/A
3H	Release agents with direct food contact	Intended	GMP limits

Typical Applications

Grade/Class	Common Applications
H1	Food processing equipment where lubricant may contact food incidentally
H2	Closed systems, equipment with no possibility of food contact
H3	Rust prevention on hooks, trolleys; edible oil applications
3H	Pan release, divider oils, mold release in direct food contact

Notes & Limitations

- NSF registration requires formulation from FDA-approved ingredients
- H1 lubricants must not exceed 10 ppm incidental contact if it occurs
- Registration does not guarantee product performance—only ingredient compliance
- ISO 21469 is an international standard similar in scope to NSF H1