Moldex 7667 Multi-Gas P100 Combo Smart Cartridge

Moldex 7667 Overview

The Moldex 7667 is a combination cartridge-and-filter set that pairs the Multi-Gas Smart cartridge (7607 chemistry with color-change ESLI) with a 7740 P100 particulate filter, providing simultaneous gas/vapor and P100 particulate protection on Moldex 7000, 7800, and 9000 series respirators. Each bag contains one Smart cartridge and one P100 filter — order two sets to equip a full half-mask or full-face respirator with both sides covered.

The defining feature of the 7667 set is the End-of-Service-Life Indicator (ESLI) built into the Smart cartridge. The indicator window changes color as the activated carbon approaches saturation, giving the wearer a visible, real-time signal that replacement is needed — no guesswork, no mandatory written change-out schedule required in most workplaces when ESLI is present. Combined with P100-rated particulate filtration that captures at least 99.97% of airborne particles including oil-based aerosols, the 7667 is the most comprehensive single-purchase option in the Moldex cartridge family.

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Where the Moldex 7667 Fits in Respirator Selection

Who Should Buy the Moldex 7667?

What Does the Moldex 7667 Protect Against?

What the Moldex 7667 Does NOT Protect Against

Best Applications for the Moldex 7667

Chemical Processing and Industrial Maintenance

Workers performing routine maintenance in chemical plants — valve replacements, line clearing, tank inspections — face unpredictable gas and particulate combinations. The 7667's multi-gas Smart cartridge handles the OV+AG vapor component while the 7740 P100 filter captures metal dusts, catalyst particles, and process mists. The ESLI color change is especially valuable in environments where breakthrough odor threshold is low and early detection matters. Pair with the Moldex 9000 full-face respirator for eye and skin protection alongside respiratory coverage.

Spray Painting and Automotive Refinishing

Automotive paint booths combine solvent vapor (OV rated) with atomized paint particles (P100 rated). The 7667 addresses both in a single set. The ESLI indicator is particularly useful in spray environments where solvent concentrations change throughout the shift as products and thinner ratios vary. The Moldex half-mask respirators compatible with this set provide a low-profile fit under welding shields or grinding visors when used in multi-task areas.

Pesticide and Agricultural Chemical Application

Many pesticide formulations contain organic solvent carriers (OV) combined with dust or wettable powder components (P100 particulate). The 7667 addresses both components. Agricultural and landscape maintenance workers benefit from the ESLI indicator when working through variable conditions — spray misting, dusty field conditions, application near confined structures. Verify your specific pesticide SDS for OV rating applicability before relying on this cartridge.

Pharmaceutical and Laboratory Environments

Pharmaceutical compounding and laboratory chemical handling frequently involve both solvent vapors and fine particulate powders. The 7667's combination protection and ESLI feature support compliance with respiratory protection programs in regulated pharmaceutical facilities. The nuisance relief vs. rated protection guide explains why combination-rated cartridges like the 7667 are required in these settings — nuisance-only options are not appropriate for pharmaceutical work.

Hazardous Materials Response and Confined Space Pre-Entry Atmospheric Testing Support

Hazmat technicians performing below-IDLH remediation work at multi-contaminant spill sites — where gas and particulate monitoring has confirmed exposure levels within air-purifying respirator use limits — benefit from the 7667's broad coverage. Always confirm that concentrations are below IDLH and that oxygen levels are adequate before selecting any air-purifying respirator for hazmat response. Equip the Moldex full-face respirator for added eye protection in chemical spill environments.

Pros and Cons

Compatible Moldex Respirators

The Moldex 7667 does NOT fit any non-Moldex respirator. Attempting to force-fit Moldex cartridges onto 3M, Honeywell North, MSA, Scott, or other facepieces creates a dangerous false fit — no respiratory protection is provided and seal damage may result.

Moldex 7667 vs Other Moldex Cartridges

Moldex 7667 vs Moldex 7367

Moldex 7667 Quick Answers

Does the Moldex 7667 have an ESLI?

Yes. The Moldex 7667 set includes the Multi-Gas Smart cartridge, which has a built-in color-change End-of-Service-Life Indicator (ESLI). The indicator window changes color as the activated carbon sorbent approaches saturation. This visual signal replaces the need for a mandatory written change-out schedule in most OSHA respiratory protection programs that require change schedules when ESLI is not available.

How many Moldex 7667 sets do I need for one respirator?

You need two Moldex 7667 sets per respirator. Each bag contains one Smart cartridge and one P100 filter — enough for one side of a half-mask or full-face respirator. A complete respirator requires two cartridges and two filters (one per port), so order two 7667 sets per worker per replacement cycle.

What respirators is the Moldex 7667 compatible with?

The Moldex 7667 is compatible with Moldex 7000 series half-mask respirators (7001, 7002, 7003), the Moldex 7800 series half-mask, and the Moldex 9000 series full-face respirators (9001, 9002, 9003). It is not compatible with any non-Moldex respirator — 3M, Honeywell North, MSA, Scott, and other brands use different bayonet mount systems.

What gases does the Moldex 7667 protect against?

The Moldex 7667 Multi-Gas Smart cartridge is NIOSH-rated for organic vapors (OV) and acid gases (AG) in combination — the same chemistry as the 7607 single cartridge. It does not protect against ammonia, methylamine, mercury vapor, formaldehyde at rated concentrations, or carbon monoxide. Confirm your specific exposure compounds against the multi-gas rating before use.

What is the difference between the Moldex 7667 cartridge and the 7740 P100 filter?

The 7667 set contains two components: the Multi-Gas Smart cartridge handles gas and vapor adsorption, while the 7740 P100 filter handles particulate capture. They work together when assembled on a compatible Moldex respirator — the P100 filter typically attaches to the outside of the cartridge. The ESLI indicator is on the cartridge only; the P100 filter is replaced based on physical condition, breathing resistance, or end of shift.

Is the Moldex 7667 NIOSH approved?

Yes. The Moldex 7667 combo set — comprising the Multi-Gas Smart cartridge and the 7740 P100 filter — uses NIOSH-approved components. The 7740 P100 filter carries the P100 particulate approval, and the Smart cartridge carries the multi-gas OV/AG approval. Verify that your respiratory protection program references the current NIOSH approval number for your purchased lot.

Can the Moldex 7667 be used for spray painting?

Yes, for spray painting applications involving solvent-based paints. The Multi-Gas Smart cartridge addresses organic vapor solvents, and the P100 filter captures atomized paint particles. Verify that your specific paint system's SDS lists hazard constituents within the OV+AG rating. For water-based paints without significant VOC content, a P100-only filter may suffice — the 7667 is appropriate when solvent vapors are confirmed in the exposure profile.

Moldex 7667 Specifications

Helpful Buying Guides

• Respirator Cartridge ESLI Guide — When Color-Change Indicators Change Your Change-Out Program
• P95 vs R95 vs P100 Filter Class Guide — Which Particulate Rating Do You Need?
• Nuisance Relief vs Rated Respirator Protection — Understanding the Difference
• Best 3M Respirator Cartridges — Cross-Brand Comparison for Multi-Gas Applications
• 3M vs Honeywell North Respirator Cartridges — Full Lineup Comparison
• Best Respirator Cartridge for Mercury Vapor — When Multi-Gas Is Not Enough
• Best Honeywell North Cartridge for Mold Remediation — P100 Combo Selection Guide

Moldex 7667 Frequently Asked Questions

How many Moldex 7667 sets should I order for a two-person crew?

Order four Moldex 7667 sets for a two-person crew — two sets per worker, since each bag equips one side of the respirator. If your crew replaces cartridges weekly, multiply the weekly quantity by your stocking interval. Buying two sets per person in the same order ensures matching cartridge and filter replacement cycles on both sides of each respirator.

Can I use a Moldex 7667 with a 3M half-mask respirator?

No. The Moldex 7667 uses a Moldex-specific bayonet mount. It is physically incompatible with 3M, Honeywell North, MSA, and all other brands' respirators. Attempting to modify or force-fit Moldex cartridges onto non-Moldex facepieces voids approval and creates an unsafe condition. If you use a 3M facepiece, the comparable multi-gas P100 combination option is the 3M 60926 or equivalent from the 3M 60900 series.

When should I replace the Moldex 7667 cartridge vs the P100 filter?

Replace the Smart cartridge when the ESLI window shows a color change indicating saturation — or immediately at any sign of odor or taste breakthrough. Replace the 7740 P100 filter when it is physically damaged, shows visible contamination, causes increased breathing resistance, or at the end of your shift in heavy particulate environments. The two components have independent replacement triggers and may not need replacement at the same time.

Does the Moldex 7667 require a written change-out schedule?

In most OSHA-compliant respiratory protection programs, no written change-out schedule is required for the cartridge component when ESLI is present and functioning. OSHA 29 CFR 1910.134 Appendix B2 allows ESLI-equipped cartridges to use the indicator as the replacement criterion. Confirm with your industrial hygienist that the ESLI is appropriate for your specific contaminant concentrations and that the indicator is reliable under your exposure conditions.

Is the Moldex 7667 appropriate for spray polyurethane foam (SPF) insulation applications?

Spray polyurethane foam applications involve isocyanate vapors and particulate spray mist. The Moldex 7667's OV+AG+P100 profile provides relevant coverage, but isocyanate-specific protection requirements often mandate higher assigned protection factors and respirator selection based on air monitoring data. Consult your safety data sheet and a qualified industrial hygienist — isocyanate applications are frequently outside the scope of standard OV-rated cartridges at roof-off or enclosed spray concentrations.

What is the difference between the Moldex 7607 cartridge and the cartridge in the 7667 set?

They use the same chemistry. The cartridge in the 7667 combo set is the 7607 Multi-Gas Smart cartridge — the identical unit sold individually at $6.65 as the Moldex 7607. The 7667 set bundles that cartridge with the 7740 P100 filter in one bag for convenience. If you only need cartridge replacements (your P100 filters are still serviceable), order the 7607 directly to avoid purchasing filters you do not yet need.

How do I verify the ESLI on the Moldex 7667 Smart cartridge is functioning before each use?

Before each use, inspect the ESLI indicator window on the Smart cartridge. The indicator should appear in its pre-use baseline color — refer to the Moldex product insert for the specific starting color. If the indicator window already shows a color change or partial change before the cartridge has been used, do not use that cartridge. Store unused cartridges in the original sealed packaging away from heat and chemical vapors to preserve ESLI accuracy.

Does the Moldex 7667 protect against welding fumes?

The P100 filter component captures metal particulates and fumes generated during welding. However, welding also produces metal vapors (manganese, hexavalent chromium, lead) and gases (ozone, nitrogen oxides) that may require specific cartridge chemistry beyond the standard OV+AG multi-gas profile. For welding applications, verify your exposure assessment covers all generated contaminants — the welding fume cartridge selection guide provides a cross-brand breakdown of this decision.

Can the Moldex 7667 be used for asbestos abatement?

Asbestos abatement regulations under OSHA 29 CFR 1926.1101 specify respirator requirements based on exposure action level and regulation requirements — P100 filtration is required for asbestos fiber capture, and the 7667's P100 filter meets that particulate requirement. However, asbestos abatement work also has facepiece type requirements (half-mask vs full-face vs PAPR) that depend on measured or predicted fiber concentrations. Confirm with your industrial hygienist and your asbestos abatement contractor's respiratory protection program before use.

Is the Moldex 7667 available in a pair (two sets in one package)?

No. The Moldex 7667 is sold as a single set — one Smart cartridge and one P100 filter — per bag at $18.50. To fully equip one respirator, add two bags to your cart. There is no dual-set bundle for this SKU. If you need the Multi-Gas Smart cartridges without the P100 filter, the Moldex 7600 pair ships two cartridges in one package.

What is the shelf life of the Moldex 7667 in its original packaging?

Moldex specifies a shelf life for sealed cartridges — refer to the lot code and packaging date printed on the bag for the applicable shelf life for your specific stock. Store in the original sealed packaging, away from heat sources, humidity, and chemical vapors. Opened or exposed cartridges (even if unused during a shift) lose shelf-life validity and should be treated as used once the seal is broken.

Where can I buy a Moldex 7000 series respirator to use with the 7667 set?

The Moldex 7000 series half-mask respirator is available directly at WC Safety in XS, S, and M sizes. The Moldex 9000 full-face respirator is the full-face option for higher protection factor applications. Both are compatible with the 7667 cartridge set. Browse the full Moldex half-mask respirator collection or the Moldex full-face respirator collection to select the right facepiece size.