Is the Moldex 7367 the right combination cartridge for isocyanate and multi-hazard work?

If your job involves spraying two-component coatings, working near acid mist and solvent vapors simultaneously, or applying pesticides with both organic vapor and particulate hazards, a standard organic vapor cartridge is not enough — and a stand-alone P100 filter is not enough either. You need a single assembly that covers gas, vapor, and oil-rated particulate at the same time. The Moldex 7367 is that assembly. Short answer: yes, for workers on the Moldex 7000, 7800, or 9000 platform who face simultaneous OV, acid gas, and particulate hazards, the 7367 is the right cartridge — with one important caveat around change scheduling and ESLI that you need to understand before you buy.

Moldex 7367 Organic Vapor Acid Gas P100 Combo Cartridge Review (2026)

Combination cartridges exist because real-world hazard profiles rarely present in isolation. A spray painter applying two-component polyurethane coatings faces MDI or TDI isocyanates (which require P100 particulate protection) alongside solvent organic vapors from the carrier. A semiconductor fab technician cleaning with hydrofluoric acid faces acid gas alongside process solvents. A crop sprayer working with organophosphate pesticides faces both vapor and respirable particulate from the spray mist. In all of these scenarios, reaching for a single-hazard cartridge means leaving part of the exposure unaddressed.

The Moldex 7367 addresses this by stacking three NIOSH-approved protection levels into one combination assembly: activated carbon for organic vapors, chemisorbent media for acid gases including hydrogen chloride, chlorine, hydrogen fluoride, sulfur dioxide, and hydrogen sulfide, and a P100-rated particulate filter rated at 99.97% efficiency including oil aerosols. It mounts on the Moldex bayonet platform used across the 7000, 7800, and 9000 series respirators, and it changes in seconds without tools.

This review covers everything a buyer needs to evaluate the 7367 honestly: what it protects against and what it explicitly does not, how it stacks up against the 3M 60926 and Honeywell North equivalents, where it sits within the Moldex P100 combo lineup, total cost of ownership for a full respirator setup, and the change-schedule obligations OSHA 29 CFR 1910.134 imposes when no End-of-Service-Life Indicator is present.

Who should buy the Moldex 7367

• Isocyanate spray applicators — MDI and TDI two-component coatings require P100 particulate protection (OSHA requirement); the 7367's combined OV+AG+P100 assembly covers both the aerosol and the vapor phase in a single cartridge.
• Workers in acid-gas environments with co-exposures — semiconductor fab, metal pickling lines, and chemical processing where HCl or SO2 coexists with solvent vapors benefit from combined coverage that a cartridge-only or filter-only approach cannot provide.
• Spray pesticide applicators — organophosphate and pyrethroid applications generate both organic vapors and respirable particulate mist; the P100 stage handles the mist and the OV stage handles the vapor fraction.
• Welders in acid-gas environments — where flux fumes, HF from stainless, or SO2 from electrode coatings accompany weld fume particulate.
• Workers already on the Moldex 7000 or 9000 platform — if the respirator is already Moldex, the 7367 drops in without changing the facepiece, training, or fit-test record.
• Employers needing a single SKU for multi-hazard tasks — one cartridge type covering three hazard categories simplifies inventory and reduces the chance that workers inadvertently use the wrong cartridge for the exposure.
• Higher-risk tasks requiring APF 50 — paired with the Moldex 9000 series full-face respirator, the 7367 provides an APF of 50 — appropriate for tasks where concentrations exceed 10x the OEL.

What the Moldex 7367 does well

Triple NIOSH protection in one assembly

The 7367 stacks organic vapor adsorption (activated carbon granules), acid gas chemisorption (the AG sorbent stage), and P100 particulate filtration (99.97% efficiency, oil-rated) into a single combination assembly. This is not a marketing combination — each protection level is independently NIOSH-approved under 42 CFR 84, and the P100 designation under that standard requires testing with DOP (dioctyl phthalate) oil aerosol, confirming oil-aerosol rated performance. For isocyanate spray applications where OSHA specifically requires P100 or equivalent oil-rated filtration, this matters. A standard OV cartridge without a P100 filter stage does not meet that requirement.

Broad acid gas coverage for chemical process environments

The acid gas stage of the 7367 addresses hydrogen chloride (HCl), chlorine (Cl2), hydrogen fluoride (HF), sulfur dioxide (SO2), and hydrogen sulfide (H2S). This breadth makes the cartridge usable across a wide range of acid-gas environments without selecting a more narrow specialty cartridge. For workers in semiconductor fabs handling HF-based etchants, metal pickling operations using HCl baths, or pulp and paper environments with SO2 co-exposure, the 7367's acid gas stage provides regulatory-compliant coverage when the exposure is at or below the concentration limits for which the cartridge is rated. Review your cartridge selection methodology against current IH monitoring data to confirm the 7367's protection factor is adequate for your specific concentration.

Bayonet mount: tool-free, platform-consistent

The Moldex bayonet mount is a proprietary quarter-turn system shared across all Moldex cartridge types for the 7000, 7800, and 9000 series. A worker can swap cartridge types — from a standard 7300 OV/AG cartridge to the 7367 combination assembly — without tools, in roughly three seconds per side. This matters in programs where workers cycle between tasks with different hazard profiles during a shift. It also simplifies donning/doffing inspection because the mount is visually identical across cartridge types, reducing the chance of a misseated cartridge.

Engineered for the isocyanate use case

Two-component polyurethane spray coatings are among the most common occupational asthma triggers in spray finishing environments. OSHA and NIOSH guidance on isocyanate exposure control specifically calls for supplied-air respirators in high-concentration scenarios, but for lower-concentration or intermittent tasks, a P100-rated air-purifying respirator is often the specified control. The 7367 provides the P100 stage required for the aerosol phase of MDI/TDI spray, the OV stage for the solvent carrier, and the AG stage for any acid-gas byproducts in the spray environment. Pair this with the Moldex 9000 full-face respirator for the APF 50 needed where concentrations exceed 10x the TLV.

Competitive cost against cross-brand equivalents

At approximately $11.62 per set, the 7367 is priced competitively against the 3M 60926 and Honeywell North OV/AG/P100 combination cartridges. The full-respirator setup cost of approximately $23.24 (two sets) is reasonable for a NIOSH-approved triple-protection assembly. The compact form factor also reduces the added dead-space and breathing resistance that some bulkier combination cartridge designs introduce.

Platform flexibility across three respirator families

The 7367 is compatible with the Moldex 7000 series half-mask (7001, 7002, 7003), the Moldex 7800 series, and the Moldex 9000 series full-face (9001, 9002, 9003). An employer running a mixed fleet of half-mask and full-face Moldex respirators can stock a single cartridge SKU for both, simplifying procurement and reducing the risk of workers using mismatched cartridges.

Where the Moldex 7367 falls short

No ESLI — written change schedule required

This is the most significant compliance implication of the 7367. OSHA 29 CFR 1910.134(d)(3)(iii)(B) requires that when a cartridge lacks an End-of-Service-Life Indicator (ESLI) certified by NIOSH, the employer must implement a change schedule based on objective information or data. That means industrial hygiene monitoring, OSHA HASP documentation, or a validated change schedule from the supplier. You cannot simply use cartridges until a smell is detected — odor breakthrough is not a reliable indicator for many acid gases, and for some contaminants the OEL is below the odor threshold. The Moldex 7667 includes an ESLI (the Smart Cartridge indicator) and extends formaldehyde coverage if those features are required for your program.

No ammonia or methylamine coverage

The 7367's acid gas stage does not cover ammonia (NH3) or methylamine. Workers in agriculture, refrigeration, aquaculture, or any environment with ammonia co-exposure must select the Moldex 7467, which provides ammonia and methylamine coverage alongside P100 filtration. Using the 7367 in an ammonia environment provides no protection against that specific gas — the activated carbon and acid gas sorbent beds in the 7367 are not effective against basic amines at ambient conditions.

1 set per bag — under-ordering is a real risk

The 7367 is sold as one set per bag: one OV+AG cartridge and one P100 filter. A dual-port half-mask or full-face respirator requires two ports to be equipped, which means two bags per respirator. This is a frequently misunderstood purchase unit. An employer ordering for a ten-person crew needs twenty bags — not ten. The product listing and shelf label typically show the per-set price; the per-respirator cost is approximately $23.24. This is not a product flaw, but it requires explicit communication in procurement and in worker training.

Moldex-platform exclusivity

The bayonet mount is Moldex-proprietary. The 7367 cannot be used with 3M, Honeywell, MSA, or other brand half-masks or full-face respirators. Facilities running a mixed-brand respirator fleet will need separate cartridge programs for each facepiece brand, which complicates inventory and creates more opportunity for workers to inadvertently use the wrong cartridge for the wrong respirator. See the full respirator filters and cartridges collection for cross-brand alternatives.

Moldex 7367 vs. 3M 60926 vs. Honeywell North OV/AG/P100

The three major OV+AG+P100 combination cartridges on the market come from Moldex, 3M, and Honeywell North. All are NIOSH-approved under 42 CFR 84 for the same protection categories, but they differ in platform compatibility, ESLI availability, and pricing. The table below covers the key differentiators.

Prices are approximate and subject to change. Verify current pricing before purchasing. Platform compatibility is brand-specific; do not mix cartridge brands with different facepiece brands.

Moldex P100 combination cartridge lineup: which one is right?

Moldex offers three distinct P100 combination assemblies targeting different gas/vapor hazard profiles. Understanding which differentiators matter for your exposure is the fastest path to selecting the correct cartridge. The table below maps the three options.

Decision rule:

• Organic vapor + acid gas + particulate, no ammonia, no formaldehyde at IDLH, no ESLI required: choose the 7367
• Ammonia or methylamine is the primary gas hazard alongside particulate: choose the 7467
• Formaldehyde co-exposure, complex multi-gas environment, or ESLI required by your respiratory protection program: choose the 7667
• Particulate only with nuisance-level organic vapor, no gas/vapor hazard: choose the 7740

Compatible Moldex respirators

The Moldex 7367 uses the Moldex bayonet mount and is compatible with all respirators in the following Moldex series. Cross-brand installation is not possible and not approved.

• Moldex 7000 series half-mask — 7001 (S), 7002 (M), 7003 (L) — APF 10 with the 7367. Dual-port; requires 2 sets per respirator. View the full Moldex half-mask respirator collection.
• Moldex 7800 series half-mask — Similar dual-port half-mask platform sharing the same bayonet specification as the 7000 series.
• Moldex 9000 series full-face — 9001 (S), 9002 (M), 9003 (L) — APF 50 with the 7367. Full-face increases the protection factor 5x over the half-mask and eliminates eye and mucous membrane exposure to irritant vapors. View the full Moldex full-face respirators collection.

If you are selecting a facepiece to pair with the 7367, the APF you need should drive the decision. For tasks where the measured concentration is between 1x and 10x the OEL, an APF of 10 (half-mask) is sufficient. For tasks between 10x and 50x the OEL, or where the contaminant has a low TLV and concentrations cannot be reliably kept below 10x that level, the full-face respirator at APF 50 is required. See our guide on how to choose a respirator cartridge for the full selection framework.

Combination cartridge design, P100 vs. N100, and why isocyanate requires P100

How combination cartridges work

A combination cartridge integrates two distinct filtration mechanisms into a single assembly. The gas/vapor stage uses sorbent beds — typically activated carbon for organic vapors and chemically impregnated carbon or metal oxide sorbents for acid gases. The particulate stage uses an electret fiber filter medium. In the 7367, the particulate filter (the P100 disc or capsule) sits downstream of the gas/vapor sorbent in the airflow path. When you inhale, air passes through the P100 filter first (removing particles before they can load the sorbent bed), then through the OV/AG sorbent beds. This order protects the sorbent from particulate loading and prolongs the useful service life of the gas protection stage.

P100 vs. N100: why oil-rated filtration matters for isocyanates

NIOSH classifies particulate filters into three series: N (not oil-resistant), R (oil-resistant for a single shift), and P (oil-resistant, no shift limitation specified). Within the P series, P100 achieves 99.97% efficiency — one step above P95 and P99. Isocyanate aerosols (MDI, TDI) are oil-based, which means N-series filters are not approved for isocyanate particulate. OSHA guidance on isocyanates specifically requires P100 or equivalent. An N100 filter achieves the same 99.97% efficiency but is not rated for oil aerosols. For isocyanate environments, P100 is the correct specification — and the 7367 meets it. See our explainer on organic vapor vs. P100: when do you need both for a full breakdown of filter series selection.

Cartridge color coding

NIOSH and ANSI Z88.7 assign standardized color codes to respirator cartridges by protection type. Organic vapor cartridges are black; acid gas cartridges are white; P100 particulate filters are magenta (purple). Combination cartridges carry multiple color bands corresponding to each protection level. The 7367 carries black (OV), white (AG), and magenta (P100) markings. Workers trained on color coding can confirm at a glance that the 7367 is installed — not a single-hazard cartridge. For a complete reference, see our respirator cartridge color chart.

Total cost of ownership: what the 7367 actually costs per worker

Two sets per respirator — do not under-order

The Moldex 7367 is sold as one set per bag. Each set contains one OV+AG cartridge body and one P100 filter element. A single half-mask or full-face Moldex respirator has two cartridge ports — one on each side. Equipping one respirator requires two bags. At an approximate retail price of $11.62 per set, the per-respirator cartridge cost is approximately $23.24. For a ten-worker crew, that is approximately $232.40 per cartridge change cycle, not $116.20. Procurement teams that calculate based on the per-set price without doubling for dual-port installation will systematically under-purchase.

Change schedule: the hidden compliance cost

Because the 7367 lacks an ESLI, OSHA 29 CFR 1910.134(d)(3)(iii)(B) requires the employer to establish a written cartridge change schedule. Developing a defensible change schedule requires industrial hygiene exposure assessment data or documented use of a supplier-validated model (such as the 3M Service Life Software or equivalent). This is a real compliance cost — both in IH time and in the risk of over- or under-scheduling changes. Over-scheduling means higher consumable costs; under-scheduling means potential overexposure. If your respiratory protection program cannot support a written change schedule, the Moldex 7667 Smart Cartridge (with ESLI) may reduce that burden — at a higher per-set cost.

Storage and shelf life

Unused combination cartridges should be stored sealed in original packaging, away from heat, humidity, and chemical contamination. Opened cartridges begin adsorbing ambient contaminants immediately and should not be returned to storage for reuse in a subsequent shift without a change schedule that accounts for cumulative service time. Many respiratory protection programs designate opened combination cartridges as single-shift consumables regardless of actual exposure time, which simplifies the change schedule at the cost of higher consumable spend.

Final verdict: Moldex 7367 OV+AG+P100 Combo Cartridge

The Moldex 7367 is the correct cartridge for workers on the Moldex platform who face simultaneous organic vapor, acid gas, and oil-aerosol particulate exposures. It earns its 4.5/5 rating by delivering verified, NIOSH-approved triple protection in a compact combination assembly at a competitive price point. The tool-free bayonet mount, broad acid gas coverage, and platform compatibility across three Moldex respirator families make it a practical single-SKU solution for multi-hazard programs.

The deductions come from the lack of an ESLI (requiring a written change schedule), the exclusion of ammonia and methylamine from the gas coverage, and the easy-to-miss purchase unit of one set per bag requiring two bags per respirator. None of these are disqualifying — they are known tradeoffs that most industrial hygiene programs can manage with proper documentation. For programs that cannot support a written change schedule or that require ammonia coverage, the 7467 or 7667 are the correct redirects.

For isocyanate spray, acid mist with vapor co-exposure, semiconductor fab, or organophosphate pesticide application on the Moldex platform, the 7367 is the right combination cartridge.

Browse more options in the Moldex respirator cartridges and filters collection or the full respirator filters and cartridges collection. For additional buying guidance, see our guides on the best respirator cartridge for epoxy resin, the best respirator cartridge for solvents, and the best respirator cartridge for acid gas.

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Frequently Asked Questions — Moldex 7367 OV+AG+P100 Combo Cartridge

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