Moldex 7667 Respirator Cartridge — Multi-Gas/P100 Combo (Semi-Rectangular, Moldex 7000/9000)

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Read our hands-on Moldex 7667 review for field-tested buyer notes.

Moldex 7667 Respirator Cartridge Overview

The Moldex 7667 is a NIOSH-approved combination cartridge for Moldex respirators that protects against multi-gas AND airborne particulate in one unit. The built-in P100 filter captures at least 99.97% of particles, so the Moldex 7667 covers gas plus dust without a separate filter. It uses Moldex's semi-rectangular design for lower breathing resistance. It is a Moldex SMART cartridge with a color-changing end-of-service-life indicator (ESLI). Start with the cartridge selection guide, the organic vapor vs P100 guide and the color chart.

As a semi-rectangular combination cartridge the Moldex 7667 belongs to the Moldex respirator cartridges and filters range and fits Moldex 7000 and 7800 series half-mask respirators and 9000 series full-face respirators. Choose the gas-only 7607 if there is no dust.

Where the Moldex 7667 Fits in Cartridge Selection

The Moldex 7667 handles multi-gas and airborne particulate. If you are weighing gas-only versus combination cartridges, our filter types explained and Moldex combo cartridge guide help you decide.

Who Should Buy the Moldex 7667?

Buy it if your work mixes multi-gas with dust or mist on a Moldex facepiece. Choose the gas-only 7607 if there is no dust. For a broader gas mix with P100, see the Moldex 7667 multi-gas / P100 SMART cartridge.

What Does the Moldex 7667 Protect Against?

What the Moldex 7667 Does NOT Protect Against

The Moldex 7667 does not stop gases outside its approved list. For a broader gas mix use the 7667 multi-gas / P100; for particulate alone the 7740 P100 filter is enough.

No air-purifying cartridge makes a dangerous atmosphere safe. Never use the Moldex 7667 in an oxygen-deficient or IDLH (immediately dangerous to life or health) atmosphere, in unknown concentrations, or against gases with no warning properties — those conditions require a supplied-air or SCBA system, not a cartridge respirator.

Best Applications

Maintenance & response with dust

Mixed or unknown gases plus particulate; the SMART indicator times change-out. See 7667 vs 3M 60926.

Labs with dust

Broad gas mix where dust is present.

Pros & Cons

Moldex 7667 vs Other Moldex Cartridges

Moldex 7667 vs the Alternatives

How it compares to the closest Moldex options:

• 7667 vs 7607: same broad gas coverage and SMART indicator; the 7667 adds a built-in P100 filter for dust.
• 7667 vs 7367: the 7667 adds ammonia and formaldehyde over the 7367.
• 7667 vs 7740: the 7740 is particulate only; the 7667 adds the full gas mix.

Moldex 7667 Quick Answers

Does the Moldex 7667 need a separate filter?

No — the P100 filter is built in; there is no filter or retainer to add.

Does the Moldex 7667 fit Moldex 7000 and 9000 respirators?

Yes — it fits the 7000 series half-mask and 9000 series full-face (and 7800 series).

Is the Moldex 7667 reusable?

The cartridge is used until its gas or filter service life is reached; the respirator is reusable across many changes.

Moldex 7667 Specifications

Compatible Moldex Respirators

The Moldex 7667 uses the Moldex bayonet connection, so it mounts on the Moldex 7000 series half-mask (and 7800 series) and the Moldex 9000 series full-face respirators. It does not fit 3M, Honeywell North or MSA facepieces.

Helpful Buying Guides

• Moldex 7000 vs 3M 6000 series
• How to choose a respirator cartridge
• Moldex 7100 vs 7300 vs 7600 upgrade guide
• organic vapor vs P100
• respirator cartridge color chart
• respirator filter types explained

Moldex 7667 Frequently Asked Questions

What does the Moldex 7667 protect against?

The 7667 is a multi-gas / P100 combination cartridge. It captures organic vapor, acid gas, ammonia, methylamine and formaldehyde and filters at least 99.97% of airborne particulate. It does not protect against gases outside its approved list.

Does the Moldex 7667 filter dust?

Yes. The built-in P100 filter captures at least 99.97% of airborne particles, including oil-based mists, so no separate filter is needed.

Which respirators does the Moldex 7667 fit?

It uses the Moldex bayonet connection and fits Moldex 7000 and 7800 series half-mask respirators and 9000 series full-face respirators. It does not fit 3M, Honeywell North or MSA facepieces.

What does P100 mean on the 7667?

P100 is the highest NIOSH particulate rating: oil-proof and at least 99.97% efficient. The 7667 carries a magenta P100 marking alongside its gas-class band.

Is the Moldex 7667 NIOSH-approved?

Yes, under 42 CFR Part 84 for its gases and P100 particulate. It is a Moldex SMART cartridge with a color-changing end-of-service-life indicator (ESLI). Verify against the NIOSH Certified Equipment List.

What is the difference between the 7667 and the 7607?

Both cover the same gas, but the 7667 adds a built-in P100 filter for dust. Choose the gas-only 7607 if there is no particulate.

Does the Moldex 7667 need a separate filter?

No. The P100 particulate filter is built in, so there is no filter or retainer to add.

Is the Moldex 7667 the semi-rectangular design?

Yes — it uses Moldex's semi-rectangular shape for more surface area and lower breathing resistance.

How often should I replace the Moldex 7667?

Change it when the SMART indicator changes color, or when breathing through the P100 becomes noticeably harder.

How is the Moldex 7667 sold?

This listing is a pair (2 cartridges). Use Request a Quote for case pricing.

Is this the genuine Moldex 7667 cartridge?

Yes. WC Safety sells authentic, NIOSH-approved Moldex 7667 cartridges through legitimate supply channels.

How should I store the Moldex 7667?

Store it sealed in its original packaging, away from gases and dust, so neither the gas nor filter service life is used up before use.