Is the Moldex 7467 the right combination cartridge for ammonia-plus-dust environments?

If your workplace exposes workers to ammonia vapor and particulate hazards simultaneously — poultry processing lines, enclosed fertilizer application, aquaculture facilities, or livestock confinement buildings — a standard ammonia-only cartridge is not enough. You need a combination assembly that handles both the gas-phase amine chemistry and the airborne dust, dander, or bioaerosols in the same device. The Moldex 7467 is Moldex's purpose-built answer for exactly that combination.

This review evaluates the 7467 against NIOSH and OSHA documentation, compares it directly to the ammonia-only Moldex 7400 and the 3M 6004, and explains when it is the correct selection versus other Moldex P100 combination assemblies. If you are working in a solvent or acid gas environment, this is not the cartridge you need — see the Moldex 7367 OV/AG+P100 instead.

Moldex 7467 Ammonia Methylamine P100 Combo Cartridge Review (2026)

The Moldex 7467 is a NIOSH-approved combination assembly consisting of one ammonia/methylamine cartridge fused with one P100 particulate filter in a single bayonet-mount housing. Each bag contains one assembly. Because respirators require bilateral cartridge replacement, two bags are needed per full respirator setup — bringing the complete cost to approximately $29.60 at roughly $14.80 per bag.

The cartridge fits the Moldex 7000 series half-mask respirators (7001, 7002, 7003), the Moldex 7800 series, and the Moldex 9000 series full-face respirators (9001, 9002, 9003) via a proprietary bayonet mount. It does not cross-fit 3M, MSA, Honeywell, or other manufacturers' facepieces.

NIOSH classifies this cartridge under the AM (ammonia/methylamine) category in 42 CFR Part 84. The P100 component provides at least 99.97% filtration efficiency against all airborne particulates, including oil aerosols — meeting the most stringent NIOSH filter class. There is no End-of-Service-Life Indicator (ESLI) for the ammonia portion. Per OSHA 29 CFR 1910.134 Appendix B2, employers must establish a written cartridge change schedule based on objective information — industrial hygiene data, supplier data, or a validated ESLI software model — before deploying these cartridges in a respirator program.

The 7467's utility is in environments where ammonia co-exists with dust, dander, mist, or bioaerosols. This covers a specific but large industrial footprint: poultry processing, concentrated animal feeding operations (CAFOs), aquaculture, anhydrous ammonia fertilizer application, and amine-chemistry manufacturing. In all of these, an ammonia-only cartridge (Moldex 7400) leaves workers unprotected against the particulate co-hazard. The 7467 closes that gap.

WC Safety Editorial Verdict: 4.3 / 5

The Moldex 7467 earns its place as the definitive combination cartridge for ammonia-plus-particulate environments. NIOSH approval for AM-class gases and P100 particulates in a single bayonet assembly is a genuine operational benefit — no stacked adapters, no compatibility guesswork. The limitation is real and must be managed: no ESLI means a rigorously maintained written change schedule is a compliance requirement, not optional housekeeping. For poultry processing, fertilizer application, and aquaculture operations, the 7467 is the correct Moldex selection. For solvent or acid gas environments, it is not.

Rated 4.3/5 for hazard-specific accuracy, NIOSH P100 co-protection, tool-free installation, and broad Moldex facepiece compatibility. Docked for no ESLI and Moldex-proprietary bayonet that limits platform flexibility.

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Who Should Buy the Moldex 7467

The 7467 is the correct selection for industrial hygienists, safety managers, and procurement teams sourcing respirator cartridges for the following worker populations:

• Poultry processing line workers — simultaneous ammonia exposure from refrigerant leaks or waste decomposition and airborne dander, feather dust, and bioaerosols
• Fertilizer application crews — anhydrous or aqueous ammonia in liquid or vapor form co-existing with soil dust and granular product particulate
• Aquaculture facility workers — ammonia build-up in recirculating aquaculture systems (RAS) paired with biological particulate load
• Livestock confinement and CAFO workers — ammonia off-gassing from manure pits or litter in the presence of dust, endotoxin, and bioaerosols
• Chemical manufacturing — amine synthesis or handling — where methylamine or other aliphatic amines are handled alongside aerosol or particulate hazards
• Refrigeration maintenance technicians — in ammonia-refrigerant (R-717) facilities where dust or oil mist may also be present
• Anyone already using the Moldex 7400 who needs to add P100 particulate protection to the same respirator setup

Workers in solvent, acid gas, or mixed organic environments should evaluate the Moldex 7367 OV+AG+P100 or the Moldex 7667 Multi-Gas+P100 instead. The 7467 provides no protection against organic vapors, acid gases, or formaldehyde.

What the Moldex 7467 Does Well

Accurate AM + P100 Hazard Pairing

The most operationally significant feature of the 7467 is that it correctly pairs the two protection types needed in ammonia-intensive industrial environments. Ammonia vapor and airborne particulate are frequent co-hazards in the industries listed above. Using a cartridge-only assembly such as the Moldex 7400 leaves workers exposed to particulates; using a P100-only filter such as the Moldex 7740 leaves ammonia vapor unaddressed. The 7467 addresses both in a single NIOSH-approved assembly without stacking adapters or mixing cartridge generations. This reduces donning complexity and eliminates a class of assembly errors.

P100 Oil-Aerosol Coverage

P100 is the highest NIOSH filtration class under 42 CFR Part 84, rated at 99.97% efficiency against all test aerosols including oil-based challenge agents. In environments like refrigeration maintenance (where compressor oil mist may be present) or certain chemical manufacturing settings, oil-resistant filtration matters. N100-rated filters — rated at the same efficiency but only for non-oil aerosols — are not appropriate in those contexts. The P100 component in the 7467 covers both oil and non-oil aerosols without requiring a separate filter selection decision. For more on filter letter designations, see the respirator cartridge color chart.

Tool-Free Bayonet Installation

The 7467 uses Moldex's proprietary bayonet mount, which engages with a quarter-turn motion and releases without tools. In high-turnover or cold-environment settings where gloves are worn, tool-free cartridge changes reduce the time required for daily inspection and change events. The mount provides a tactile click when fully seated, which reduces the risk of an incompletely installed cartridge creating a face seal gap at the cartridge port. Proper cartridge seating is distinct from face seal — workers should still perform positive and negative pressure user seal checks per 29 CFR 1910.134 Appendix B1 at each donning.

Broad Moldex Platform Compatibility

The 7467 is compatible with the full current Moldex reusable facepiece lineup that accepts 7-series cartridges: the Moldex 7000 series half-mask (7001 small, 7002 medium, 7003 large), the 7800 series, and the Moldex 9000 series full-face (9001 small, 9002 medium, 9003 large). Facilities already standardized on Moldex facepieces can deploy the 7467 without introducing a new platform. The half-mask configuration provides an APF of 10 (usable up to 10x the applicable TLV/PEL); the full-face configuration raises the APF to 50. For high ammonia concentrations, the full-face option also eliminates eye irritation from ammonia vapor, which at even moderate concentrations causes lacrimation and corneal irritation before olfactory warning is reliable.

Methylamine Coverage Beyond Ammonia

The AM NIOSH class covers both ammonia (NH₃) and methylamine (CH₃NH₂). In chemical manufacturing contexts — particularly facilities producing agricultural chemicals, pharmaceuticals, or specialty amines — methylamine is a common intermediate. The 7467's dual-gas coverage under a single NIOSH classification removes the need for a separate methylamine-specific cartridge selection review. Industrial hygienists managing multi-amine environments should confirm the specific amines present against NIOSH-approved cartridge classes before final selection; the AM class does not cover all aliphatic amines.

Where the Moldex 7467 Falls Short

No End-of-Service-Life Indicator

This is the most operationally significant limitation of the 7467 and of every ammonia/methylamine cartridge currently on the market. There is no color-change or electronic ESLI approved for the AM class at this time. Under OSHA 29 CFR 1910.134 Appendix B2, when no ESLI is available, employers are required to establish a written change schedule based on objective information such as industrial hygiene monitoring data, manufacturer service life data, or a validated computational model. The written schedule must be documented in the respiratory protection program before the cartridges are deployed. Facilities that have been operating without a formal change schedule are out of compliance regardless of the cartridge they are using. For guidance on establishing a change schedule, consult your industrial hygienist and review how long respirator cartridges last in practice.

Proprietary Bayonet — No Cross-Platform Use

The Moldex bayonet mount is not compatible with any other manufacturer's facepiece. Facilities that maintain mixed respirator inventories — 3M 6000/7000 series, Honeywell North, MSA Advantage — cannot standardize on the 7467 across all facepieces. This is an inherent platform constraint, not a product defect, but it is a procurement reality. If your facility's facepiece program is Moldex-only, this limitation is moot. If it is not, you will need to evaluate manufacturer-compatible alternatives such as the 3M 6004 for 3M facepieces.

Narrow Gas Coverage — Wrong for OV or Acid Gas Environments

The 7467 is approved exclusively for ammonia and methylamine. It provides no protection against organic vapors, acid gases, formaldehyde, mercury vapor, carbon monoxide, or hydrogen sulfide. Facilities where multiple hazard classes are present — for example, a chemical plant handling both amines and solvents — must conduct a thorough hazard assessment before selecting this cartridge. Selecting an ammonia-only combination cartridge in a multi-hazard environment can create a false sense of protection. If your hazard profile includes organic vapors or acid gases in addition to ammonia, evaluate the Moldex 7667 Multi-Gas+P100, which covers a broader gas class. See how to choose a respirator cartridge for a full decision framework.

Per-Respirator Cost Requires Two Bags

At approximately $14.80 per bag and two bags required per respirator (one for each side), the full setup cost is approximately $29.60 per change event. In high-frequency change-schedule environments where cartridges are replaced daily or every few shifts, this cost accumulates rapidly. Facilities with large worker populations should model the annualized cost of the change schedule against the per-cartridge price when budgeting the respiratory protection program. This is not unique to the 7467 — all combination assemblies with integrated P100 filters carry a similar cost structure compared to cartridge-plus-prefilter configurations.

Comparison: Moldex 7467 vs Moldex 7400 vs 3M 6004

The table below compares the Moldex 7467 against the most common alternatives for ammonia vapor protection — the ammonia-only Moldex 7400 and the 3M 6004 ammonia cartridge.

Decision rule: Choose the Moldex 7467 over the 7400 any time your hazard assessment confirms both ammonia vapor and airborne particulate exposure. The 7400 is appropriate only in confirmed gas-only environments with zero particulate co-hazard — a scenario that rarely exists in the primary ammonia industries listed above. Choose the 3M 6004 only if your facepiece inventory is 3M-based.

Comparison: Moldex P100 Combination Assemblies

The table below maps all three Moldex P100 combination assemblies by gas class to help safety managers select the correct cartridge for their specific hazard profile.

Decision rules:

• If your hazard is exclusively ammonia/methylamine + particulate: the 7467 is the correct, purpose-specific choice.
• If your hazard is organic vapors or acid gases + particulate with no ammonia: use the Moldex 7367.
• If your hazard profile is mixed or incompletely characterized, or involves simultaneous OV + ammonia + particulate: the Moldex 7667 provides broader coverage and adds ESLI via the Smart cartridge indicator.
• Never substitute one combination type for another based on availability alone — the gas protection classes are not interchangeable.

Compatible Moldex Respirators

The Moldex 7467 fits all Moldex reusable facepieces equipped with the 7-series bayonet port. This covers three platform families:

• Moldex 7000 Series Half-Mask — available in small (7001), medium (7002), and large (7003). APF 10. Suitable for environments where eye protection is not required from the respirator itself. See the full Moldex half-mask respirator collection.
• Moldex 7800 Series Half-Mask — an alternative half-mask platform in the same bayonet family. APF 10.
• Moldex 9000 Series Full-Face — available in small (9001), medium (9002), and large (9003). APF 50. Recommended for higher ammonia concentrations and environments where eye irritation from ammonia vapor is a concern. See the full Moldex full-face respirator collection.

The 7467 does not fit 3M, MSA, Honeywell, or any other manufacturer's facepieces. See the respirator cartridge selection guide for cross-compatibility guidance across brands.

Category Context: Ammonia Combination Cartridges

Ammonia is among the most commonly encountered industrial gases in North America. NIOSH classifies ammonia/methylamine cartridges separately from organic vapor (OV) and acid gas (AG) classes because the chemical sorbent required to capture ammonia — typically activated carbon impregnated with a strong acid — is different from the sorbents used for OV or AG protection. Mixing these classes on a single cartridge without NIOSH validation for the combination can result in sorbent interference and reduced service life for one or both gas classes.

For environments where ammonia is the primary gas-phase hazard, the correct cartridge class is always AM. The addition of P100 to form a combination assembly is appropriate whenever particulate co-hazards are present — which, in most real ammonia-intensive environments, they are. The Moldex cartridge and filter collection provides an overview of available assemblies, or consult the broader respirator filters and cartridges collection for cross-brand comparison. For a full overview of how to interpret the NIOSH color-code system for cartridges, see the respirator cartridge color chart reference.

Additional guidance on cartridge chemistry, OV versus P100 tradeoffs, and filter selection decisions is available at organic vapor vs P100 and the best respirator cartridge for ammonia guide.

Total Cost of Ownership

Understanding the full cost of operating a 7467-based respiratory protection program requires accounting for several variables beyond the sticker price of the cartridge.

Per-cartridge cost structure: Each bag contains one assembly (one ammonia cartridge integrated with one P100 filter). A respirator requires two assemblies — one per side. At approximately $14.80 per bag, the full per-respirator cost per change event is approximately $29.60.

Change schedule frequency: Because there is no ESLI for the ammonia portion, the employer's written change schedule determines how frequently cartridges must be replaced. Change frequency is driven by: (1) ammonia concentration at the work site, (2) duration of use per shift, (3) temperature and humidity (both reduce sorbent service life), and (4) cartridge manufacturer service life data for the specific concentration range. Higher concentrations and longer wear times reduce service life substantially. Facilities should not assume 8-hour shift = one change event without supporting industrial hygiene data.

P100 filter component: The P100 filter integrated into the 7467 does not have a defined service life in the absence of particulate loading. In dusty environments, the P100 component will reach end of service life (indicated by increased breathing resistance) before the ammonia sorbent is exhausted. The binding of both components in a single assembly means that when either component reaches end of service life, the entire assembly must be replaced. In high-dust environments, this may result in more frequent replacement of the ammonia sorbent than the ammonia change schedule alone would dictate.

Program cost comparison: Compared to using the Moldex 7400 ammonia-only cartridge plus a separate P100 prefilter, the 7467 combination assembly simplifies the bill of materials and reduces the number of SKUs to manage in the storeroom, which has an indirect procurement cost benefit. For additional guidance, see how long respirator cartridges last.

Final Verdict

The Moldex 7467 is the correct selection for the specific and common scenario of simultaneous ammonia vapor and particulate exposure. Its NIOSH approval for the AM class plus P100, tool-free bayonet installation, and compatibility with the full Moldex reusable facepiece lineup make it a practical, compliant choice for safety programs in poultry processing, fertilizer application, aquaculture, livestock confinement, and amine-chemistry manufacturing.

The limitations are real but manageable: the absence of an ESLI is an industry-wide gap for the ammonia class, not a 7467-specific deficiency. The proprietary mount is a platform constraint that affects all Moldex cartridges equally. Facilities with a confirmed Moldex facepiece standard and an established written change schedule will find the 7467 performs exactly as documented — it does not require qualification beyond its NIOSH certification and proper fit-test procedures.

The 7467 earns a 4.3 out of 5. For environments where it is the correct chemical match, it delivers on its core purpose without compromise.

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Frequently Asked Questions — Moldex 7467