Honeywell North N75004L Ammonia & Methylamine Respirator Cartridge

Honeywell North N75004L — OV + Ammonia/Methylamine Gas-Only Cartridge, NIOSH 42 CFR 84

The Honeywell North N75004L is a NIOSH 42 CFR 84 organic vapor + ammonia + methylamine gas-only cartridge providing dual protection against OV solvents and ammonia/methylamine without a P100 particle filter or acid gas coverage — sold as a pair for the North bayonet system. The N75004L is the correct choice when both organic vapor and ammonia are the confirmed hazards, acid gas is formally excluded, and no particles are present. If acid gas is also possible, use the N75003L (OV+AG+NH₃) or 75SCP100L. If particles are also present with ammonia, use the 7584P100L (NH₃+P100). Compatible with all North 7700, 5500, 5400, and 7600 series facepieces.

Key Features

• OV + ammonia/methylamine, no P100: Dual gas-class coverage for environments combining organic solvent vapor and basic amines — without P100 particle filter resistance for confirmed particle-free operations
• Specialized amine sorbent: The ammonia/methylamine sorbent chemistry is specifically formulated for basic gases — not interchangeable with standard acid gas sorbents
• North bayonet connector: Compatible with all North respirator facepieces
• Upgrade considerations: If acid gas is identified alongside OV and NH₃, upgrade to N75003L or 75SCP100L

Applications — When to Use the N75004L

The N75004L is for confirmed environments where OV + NH₃/MA are the documented hazards, acid gas is excluded, and no particles are present:

• Amine synthesis: Production environments where methylamine, dimethylamine, or trimethylamine are produced alongside organic solvent vapor without acid gas by-products
• Solvent + ammonia cleaning operations: Industrial or laboratory cleaning processes using both organic solvents and ammonia-based cleaning agents in non-aerosol applications
• Fish processing (gas-only areas): Trimethylamine and organic amine off-gases in enclosed processing areas confirmed particle-free
• Refrigeration with solvent co-exposure: NH₃ refrigerant environments in facilities where organic solvent vapor is also present from co-located processes, and acid gases are not generated

Compatible Respirators

All Honeywell North N-series and 7-series cartridges use the North bayonet twist-lock connector, compatible with the following facepieces.

North Cartridge & Filter Line — Full Comparison

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OSHA Compliance

• NIOSH approval required: All cartridges in OSHA-mandated programs must be NIOSH approved under 42 CFR Part 84
• Hazard assessment required: OSHA 1910.134(d)(1) — cartridge type must match the documented workplace hazard class
• Fit testing required: OSHA 1910.134(f)(2) — annual fit testing for any tight-fitting facepiece before operational use
• Cartridge change schedule required: OSHA 1910.134(d)(3)(iii) — end-of-service-life for gas/vapor cartridges must be established before use, not determined by odor breakthrough
• Medical evaluation prerequisite: OSHA 1910.134(e) — required before fit testing and before operational respirator use

Frequently Asked Questions

What does the N75004L protect against?

Organic vapors and ammonia/methylamine. Does not cover acid gases (HCl, HF, SO₂, Cl₂, H₂S) or provide particle filtration. If acid gas may be present, use N75003L. If particles are present with ammonia, use 7584P100L.

What is the difference between N75004L and 7584P100L?

The 7584P100L covers NH₃ + P100 (no OV). The N75004L covers OV + NH₃ without P100. Choose N75004L when organic vapor and ammonia are both confirmed, acid gas is absent, and no particles are present.

Which respirators does the N75004L fit?

All North bayonet facepieces: North 770030 series (S/M/L), North 550030 series (S/M/L), North 54001 and 54001S, North 760008A and 760008AS.

Is fit testing required?

Yes — OSHA 1910.134(f)(2). Annual fit testing for the facepiece before operational use.

Where can I find all North cartridges?

Browse the complete lineup at Honeywell North Respirator Cartridges & Filters →