Moldex 7367 vs 7467 vs 7667 Combination Cartridge Guide (2026)

Published: June 10, 2026  |  By: Steven Eaton, WC Safety Editorial

The Moldex 7367, 7467, and 7667 are all combination cartridges — meaning each pairs a chemical sorbent bed with a P100 particulate filter in a single unit. That is where the similarity stops. The 7367 is built for organic vapor and acid gas hazards. The 7467 is purpose-built for ammonia and methylamine, primarily in agricultural settings. The 7667 is a multi-gas smart cartridge with the broadest chemical coverage of the three and the only one equipped with an End-of-Service-Life Indicator (ESLI).

None of these is a straight upgrade of another. Selecting the wrong one does not give you "less protection" — it gives you no protection against the hazard class the cartridge was not designed for. This guide walks through how to identify which one matches your actual exposure scenario, using hazard chemistry as the primary decision criterion.

All three cartridges are part of the broader Moldex 7000-series sorbent family. The stand-alone chemical cartridges without the P100 combo filter — the Moldex 7300 OV+AG, the Moldex 7400 Ammonia/Methylamine, and the Moldex 7600 Multi-Gas Smart — are available when P100 particulate filtration is not required. The Moldex 7740 P100 filter can be added separately to those cartridges on compatible respirators.

Hazard-matching verdict: which cartridge belongs in your environment

This is not a ranking. Each row below represents a different primary exposure type. Match your environment to the correct row — that is your cartridge.

Buy the right cartridge for your hazard

Full 3-way specification comparison

Head-to-head: what each cartridge actually protects against

OV + AG coverage: 7367 and 7667, not 7467

Organic vapor and acid gas sorbent is present in both the Moldex 7367 and the Moldex 7667. The 7367 is the right tool when OV+AG is your complete hazard picture and your budget is limited. The 7667 adds formaldehyde and ClO2 coverage on top, along with ESLI. The Moldex 7467 contains no OV or AG sorbent at all — it provides zero protection against solvents, paint fumes, or acid gas byproducts.

This point cannot be overstated: wearing a 7467 in a solvent atmosphere is the same, from a protection standpoint, as wearing no chemical cartridge at all. The P100 particulate filter layer will still capture fine particles, but the chemical vapor passes straight through.

Ammonia / methylamine coverage: 7467 only (and 7667 with caveats)

The Moldex 7467 is purpose-built for ammonia and methylamine environments — the primary hazard in poultry houses, swine confinement, fertilizer handling, and certain chemical manufacturing settings. Its sorbent bed is optimized for these specific molecules.

The 7667 does carry multi-gas sorbent that includes coverage for certain ammonia concentrations, but for high-intensity dedicated ammonia environments — such as commercial poultry production — the 7467's sorbent capacity and optimization are the preferred choice. The Moldex 7367 has no ammonia sorbent whatsoever and should never be used where ammonia exposure is the primary concern.

Multi-gas coverage: 7667 is the only option

When your exposure profile includes formaldehyde, chlorine dioxide, or a combination of OV, AG, and additional reactive gases, the Moldex 7667 is the only one of these three cartridges with the sorbent profile to address all of them simultaneously. Neither the 7367 nor the 7467 can be combined or layered with each other to replicate multi-gas coverage — the cartridge design does not allow it and doing so would not satisfy NIOSH approvals.

ESLI: only the 7667 has it

An End-of-Service-Life Indicator changes color when the sorbent approaches saturation, giving the worker a visual signal that the cartridge needs replacement. Only the Moldex 7667 Smart Cartridge includes this feature among the three.

The 7367 and 7467 require a written cartridge change schedule as mandated by OSHA 1910.134(d)(3)(iii)(B)(2). That schedule must be based on documented industrial hygiene data — contaminant concentration, work duration, breathing rate, and sorbent capacity. Workers cannot guess at change intervals based on smell or discomfort; by the time you smell most chemical vapors through a saturated cartridge, the exposure has already occurred. For more detail on ESLI versus written schedules, see the ESLI vs written change schedule guide.

Price per setup: what you actually pay

Respirator cartridges are sold in pairs because half-face respirators use two simultaneously. At approximately $23.24/pair for the 7367, $29.60/pair for the 7467, and $37.00/pair for the 7667, the 7667 costs roughly 59% more per replacement set than the 7367. Over a full year of regular use with weekly changes, that gap becomes a meaningful operating expense.

That said, cost should never be the primary variable. A 7367 purchased for an ammonia environment because it is cheaper does not save money — it creates liability and fails to protect the worker. Match the hazard first; optimize cost within the correct cartridge family. For more context on when combination cartridges are the right choice over separate components, see combination cartridge vs separate filter guide.

When the 7367 is the correct choice

The Moldex 7367 is the correct selection when:

• Your exposure is to organic vapors (solvents, paints, lacquers, adhesives, fuels) and/or acid gases (chlorine, hydrogen chloride, sulfur dioxide, hydrogen fluoride at appropriate concentrations).
• Formaldehyde, ClO2, and ammonia are not present in your hazard assessment.
• Your facility has a documented written cartridge change schedule that satisfies OSHA 1910.134 requirements.
• P100 particulate protection is also needed (e.g., paint mist, lead dust, nuisance dusts alongside OV).
• Budget is a meaningful factor and broader coverage is not required by your SDS/IH assessment.

See the full Moldex 7367 product review for detailed testing context.

When the 7467 is the only option

The Moldex 7467 is the correct — and in some situations the only NIOSH-appropriate — choice when:

• Ammonia or methylamine is the primary airborne chemical hazard.
• Work takes place in poultry confinement, swine operations, livestock buildings, fertilizer blending, or similar agricultural environments.
• P100 filtration is required alongside ammonia protection (e.g., bioaerosols, fine dust, dander in poultry houses).
• OV, AG, formaldehyde, and other non-ammonia vapors are absent from the hazard assessment.

This is a niche product serving a specific and well-defined hazard class. If you are not in that hazard class, the 7467 is simply the wrong cartridge. Review the Moldex 7467 product review for application-specific detail.

When the 7667 is worth the premium

The Moldex 7667 is the correct choice when:

• Your exposure includes formaldehyde, chlorine dioxide, or a combination of chemical hazards that the 7367's OV+AG sorbent alone cannot cover.
• ESLI is required by your respiratory protection program, workplace policy, or is preferred over maintaining a written schedule.
• Workers rotate across multiple chemical environments and a single cartridge type needs to provide broad coverage without frequent changes.
• Your hazard assessment is variable or evolving and conservative over-protection is operationally appropriate.
• The higher per-pair cost is acceptable within your PPE program budget.

For a direct comparison of the 7667 against its 3M competitor, see Moldex 7667 vs 3M 60926 multi-gas comparison. The full Moldex 7667 product review is also available.

Decision guide: which cartridge should you buy

When in doubt, consult a certified industrial hygienist. OSHA 1910.134 requires that cartridge selection be based on a workplace exposure assessment — not a best guess. The consequences of cartridge misselection in a hazardous atmosphere are serious.

Frequently asked questions

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