Best Respirator Filters & Cartridges Guide (2026)

This hub helps you choose a respirator filter or cartridge by the airborne hazard, not by brand alone. It connects the 3M filter and cartridge guide, the Honeywell North cartridge guide, every contaminant guide, comparison article, product review, and product page in the WC Safety respiratory catalog into one map. It also keeps a clear line between filters (which capture particles) and cartridges (which adsorb gases and vapors) — two things that are easy to confuse and dangerous to mix up.

Selection is never automatic. The correct filter or cartridge depends on the specific contaminant, its airborne concentration, the Safety Data Sheet (SDS), a workplace exposure assessment, the facepiece you are using, and your employer's written respiratory protection program under OSHA 29 CFR 1910.134. Start with the master Respiratory Protection Guide, the how to choose a respirator cartridge guide, and the Best Respirator by Industry hub.

Respirator Filter and Cartridge Quick Selection Chart

Find the hazard, get the filter or cartridge type and common product examples, and read the warning. Confirm every choice against the SDS, the airborne concentration, and your exposure assessment before use.

Respirator Filters vs Cartridges

The single most important distinction in respiratory protection is filter versus cartridge. Choosing the wrong category leaves the worker unprotected even when the respirator "feels" sealed.

• Filters capture particles. A P100 particulate filter mechanically traps solid and liquid aerosols — dust, silica, mold spores, bioaerosols, and welding fume. It does nothing against gases or vapors.
• Cartridges adsorb gases and vapors. A gas/vapor cartridge holds a sorbent (usually activated carbon) that captures molecules such as solvent vapor, acid gas, or ammonia. It is not designed to stop fine particulate on its own.
• Combination cartridges do both. An organic vapor/P100 or multi-gas/P100 cartridge pairs a sorbent with a P100 filter, for tasks that release both a gas/vapor and a particulate or mist.
• P100 is not the same as organic vapor. A P100 particulate filter offers zero vapor protection; an organic vapor cartridge offers zero particulate protection unless it is a combination unit.
• Organic vapor is not the same as acid gas. The sorbent must match the gas — an organic vapor cartridge does not protect against chlorine, ammonia, or formaldehyde.
• Brand compatibility matters. Filters and cartridges are NIOSH-approved only with specific facepieces; mixing brands (a 3M cartridge on a Honeywell North mask) voids the approval.

Dig deeper with how to choose a respirator cartridge, respirator filter types explained, organic vapor vs P100, the respirator cartridge colour chart, and are respirator cartridges universal?.

Respirator Cartridge Compatibility Matrix

A cartridge must match both the hazard and the respirator connection. Picking the right chemistry on the wrong connection system leaves a worker unprotected.

• 3M bayonet cartridges fit compatible 3M reusable respirators (6000, 6500QL, 7500 series) only.
• Honeywell North cartridges fit compatible Honeywell North facepieces (5500, 7700, 5400, 7600) only.
• 3M Secure Click cartridges fit compatible 3M Secure Click respirators only — they are not bayonet cartridges.
• Never use another brand's cartridge on a respirator unless the manufacturer's NIOSH approval specifically allows it; mixing voids the approval.

More on compatibility: the 3M filter and cartridge guide, the Honeywell North cartridge guide, are respirator cartridges universal?, how to choose a respirator cartridge, and Secure Click vs bayonet respirators.

Best P100 Respirator Filters

A P100 particulate filter captures at least 99.97% of airborne particles and is the standard for dust, silica, mold, fiberglass, welding fume, bioaerosols, and wood dust. The 3M 2000-series are bayonet-mount filters; the 3M 7093 and 7093C are P100 particulate filters in a hard cartridge-style housing; the Honeywell North filters fit the North platform. The "nuisance" relief versions (3M 2097, 3M 2297, 3M 7093C) add limited odour relief but are not a substitute for a true organic vapor cartridge.

• 3M 2091 — P100 particulate filter for silica, mold, grinding dust, fiberglass, and wood dust. 3M 2091 review.
• 3M 2097 — P100 particulate filter with nuisance organic vapor relief for welding fume and grinding. 3M 2097 review.
• 3M 2291 — P100 particulate filter, low-profile, for dust and silica. 3M 2291 review.
• 3M 2297 — P100 particulate filter with nuisance organic vapor relief for welding fume. 3M 2297 review.
• 3M 7093 — P100 particulate filter in a cartridge-style housing for dust and fume. 3M 7093 review.
• 3M 7093C — P100 particulate filter with nuisance acid gas and organic vapor relief. 3M 7093C review.
• Honeywell North 7580P100 — P100 particulate filter for the North platform; dust, silica, mold, and welding fume. Honeywell North 7580P100 review.
• Honeywell North 75FFP100 — low-profile P100 particulate filter for the North platform. Honeywell North 75FFP100 review.

More: P100 vs N95 and respirator filter types explained.

Best Organic Vapor Respirator Cartridges

An organic vapor cartridge (colour-coded black) adsorbs solvent and VOC vapor onto activated carbon. Use it for paint, solvents, adhesives, coatings, and many cleaning chemicals. Because the sorbent has a finite capacity and many solvents have poor warning properties, an organic vapor cartridge requires a written change schedule, not reliance on smell.

• 3M 6001 — organic vapor cartridge for the 3M 6000/7500 platform. 3M 6001 review.
• 3M 60921 — organic vapor/P100 combination for vapor plus particulate or mist. 3M 60921 review.
• Honeywell North N75001L — organic vapor cartridge for the North platform. Honeywell North N75001L review.
• Honeywell North 7581P100L — organic vapor/P100 combination for the North platform. Honeywell North 7581P100L review.

Best Acid Gas Respirator Cartridges

An acid gas cartridge captures chlorine, hydrogen chloride, sulfur dioxide, and similar acid gases. Use it for acid gas cleaning tasks, water and wastewater treatment, and chemical handling where acid gases are characterized. An organic vapor cartridge does not protect against acid gas.

• 3M 6002 — acid gas cartridge for the 3M platform. 3M 6002 review.
• 3M 60922 — acid gas/P100 combination. 3M 60922 review.
• Honeywell North N75002L — acid gas cartridge for the North platform; it also carries a NIOSH formaldehyde approval. Honeywell North N75002L review.
• Honeywell North 7582P100L — acid gas/P100 combination for the North platform; it also carries a NIOSH formaldehyde approval. Honeywell North 7582P100L review.

Hazard guide: best respirator cartridge for chlorine. Above the gas's IDLH, only supplied air or SCBA is acceptable.

Best Organic Vapor + Acid Gas Cartridges

An organic vapor and acid gas combination cartridge protects against both solvent vapor and acid gas in one unit. Use it for mixed solvent and acid gas exposure, certain chemical processing, maintenance work, and industrial cleaning where both hazards may exist. Confirm both hazards against the SDS and a written change schedule.

• 3M 6003 — organic vapor/acid gas cartridge for the 3M platform. 3M 6003 review.
• 3M 60923 — organic vapor/acid gas/P100 combination. 3M 60923 review.
• Honeywell North N75003L — organic vapor/acid gas cartridge for the North platform. Honeywell North N75003L review.
• Honeywell North 7583P100L — organic vapor/acid gas/P100 combination for the North platform. Honeywell North 7583P100L review.

Best Ammonia and Methylamine Cartridges

Ammonia and methylamine require a dedicated cartridge (colour-coded green); ordinary organic vapor and acid gas cartridges do not capture them. Use it for ammonia refrigeration, agriculture, fertilizer handling, wastewater, and chemical plants.

• 3M 6004 — ammonia/methylamine cartridge for the 3M platform. 3M 6004 review.
• 3M 60924 — ammonia/methylamine/P100 combination. 3M 60924 review.
• Honeywell North N75004L — ammonia/methylamine cartridge for the North platform. Honeywell North N75004L review.
• Honeywell North 7584P100L — ammonia/methylamine/P100 combination for the North platform. Honeywell North 7584P100L review.

Hazard guide: best respirator cartridge for ammonia. Above ammonia's IDLH, only supplied air or SCBA is acceptable.

Best Formaldehyde Respirator Cartridges

Formaldehyde requires a cartridge that carries a NIOSH formaldehyde approval, because formaldehyde has poor warning properties and a standard organic vapor cartridge does not reliably retain it. On the 3M platform this is a dedicated formaldehyde cartridge; on the Honeywell North platform the acid gas cartridges carry the formaldehyde approval. Use these for labs, mortuary and pathology work, chemical handling, and formaldehyde-containing processes, on a full face respirator where the eyes are at risk.

• 3M 6005 — dedicated formaldehyde/organic vapor cartridge for the 3M platform. 3M 6005 review.
• 3M 60925 — formaldehyde/organic vapor/P100 combination. 3M 60925 review.
• Honeywell North N75002L — Honeywell North acid gas cartridge that also carries a NIOSH formaldehyde approval. Honeywell North N75002L review.
• Honeywell North 7582P100L — the same acid gas/formaldehyde approval with a bonded P100 particulate filter. Honeywell North 7582P100L review.

Hazard guide: best respirator cartridge for formaldehyde.

Best Multi-Gas Respirator Cartridges

A multi-gas cartridge captures several gas and vapor families in one unit, which suits operators moving between mixed-gas tasks. Multi-gas cartridges are for broader mixed-gas exposure — they are not magic universal cartridges. Always check the exact contaminant list against the SDS, because no cartridge covers every chemical.

• 3M 6006 — multi-gas/vapor cartridge for the 3M platform. 3M 6006 review.
• 3M 60926 — multi-gas/vapor/P100 combination. 3M 60926 review.
• Honeywell North 75SCP100L — multi-contaminant/P100 cartridge for the North platform. Honeywell North 75SCP100L review.
• Honeywell North 75SCL — Defender multi-gas cartridge for the North platform. Honeywell North 75SCL review.

See organic vapor vs P100 and the how to choose a cartridge guide before relying on a multi-gas cartridge.

Combination Cartridge + P100

A combination cartridge pairs a gas/vapor sorbent with a P100 particulate filter, so a single unit protects against both a gas or vapor and a particulate or mist — for example, spray painting (solvent vapor plus paint mist) or coating work. On the 3M platform these are the 60900-series (3M 60921, 3M 60923, 3M 60926); on the Honeywell North platform they are the P100L cartridges (Honeywell North 7581P100L, Honeywell North 7583P100L, Honeywell North 75SCP100L). A combination cartridge does not raise the assigned protection factor or extend service life — it simply covers two hazard types at once. It still does not add oxygen and is not valid in unknown or oxygen-deficient atmospheres.

3M Respirator Filters & Cartridges

Every 3M filter and cartridge below fits the 3M 6000 and 7500 series facepieces. See the full 3M filter and cartridge guide.

3M Secure Click Filters & Cartridges

3M Secure Click filters and cartridges are not bayonet-style 3M 6000/7000-series cartridges. Secure Click uses a different push-and-click connection system designed for compatible 3M Secure Click respirators (HF-800 half mask and FF-800 full face series). Do not mix Secure Click cartridges with standard 3M bayonet respirators — the connections are not interchangeable and mixing voids the NIOSH approval. Secure Click has its own buying path: see the dedicated 3M Secure Click filters & cartridges guide and Secure Click vs bayonet respirators.

Secure Click selection still depends on the contaminant, concentration, SDS, exposure assessment, and your employer's respiratory protection program — and Secure Click filters and cartridges do not add oxygen.

Honeywell North Respirator Filters & Cartridges

Every Honeywell North filter and cartridge below fits the North 5500/7700 half mask and 5400/7600 full face series. See the full Honeywell North cartridge guide.

Note: the Honeywell North 7506N95, 7506N99, 7506R95, and 7504R95 are prefilters and pads, not gas/vapor cartridges — they belong in a separate respirator prefilter guide.

Best Respirator Cartridge by Hazard

Best cartridge for paint fumes

3M 6001, 3M 60921, Honeywell North 7581P100L. Paint releases organic vapor (and mist when sprayed), so use an organic vapor or organic vapor/P100 cartridge. See best respirator for paint fumes.

Best cartridge for solvents

3M 6001, 3M 60921, 3M 60923, Honeywell North 7581P100L. Match an organic vapor cartridge to the solvent, adding a P100 where mist is present and acid gas protection where the SDS calls for it. See organic vapor vs P100.

Best cartridge for silica dust

3M 2091, 3M 2291, Honeywell North 7580P100, Honeywell North 75FFP100. Silica is a particulate hazard, so use a P100 particulate filter. See cartridge for silica dust.

Best cartridge for mold

3M 2091, 3M 2291, Honeywell North 7580P100. Mold spores are particulate, so a P100 particulate filter is the baseline; add organic vapor only if chemicals or odours require it. See best respirator cartridge for mold remediation.

Best cartridge for chlorine

3M 6002, 3M 60922, Honeywell North 75SCP100L. Chlorine is an acid gas, so use an acid gas or multi-gas cartridge — never an organic vapor cartridge alone. See best respirator cartridge for chlorine.

Best cartridge for ammonia

3M 6004, 3M 60924, Honeywell North 7584P100L. Ammonia needs a dedicated ammonia/methylamine cartridge. See best respirator cartridge for ammonia.

Best cartridge for formaldehyde

3M 6005, 3M 60925, Honeywell North N75002L, Honeywell North 7582P100L. Formaldehyde needs a cartridge that carries a NIOSH formaldehyde approval — 3M's dedicated 3M 6005/3M 60925, or the Honeywell North acid gas cartridges (Honeywell North N75002L, Honeywell North 7582P100L), which also carry a formaldehyde approval. Note that 3M acid gas cartridges do not. Follow a strict change schedule. See best respirator cartridge for formaldehyde.

Best cartridge for welding

3M 2097, 3M 2297, Honeywell North 7580P100. Welding fume is a particulate, so use a P100 particulate filter (nuisance organic vapor relief helps with odour); welding gases may require a separate assessment. See best respirator for welding fumes.

Best Respirator Cartridge by Hazard: Quick Comparison Grid

A side-by-side grid of the most common hazards with example 3M and Honeywell North options. Confirm every choice against the SDS, the airborne concentration, and your exposure assessment — and match the cartridge to your respirator's connection system.

How Long Do Respirator Filters and Cartridges Last?

• P100 particulate filters are replaced when damaged, soiled, wet, difficult to breathe through, or per your employer's program.
• Organic vapor, acid gas, ammonia, formaldehyde, and multi-gas cartridges require a written change schedule.
• Breakthrough smell or taste is not a safe change schedule — many gases have poor warning properties.
• OSHA requires employers to implement cartridge change schedules when chemical cartridges are used (29 CFR 1910.134).
• End-of-service-life indicators (ESLI) only apply where they are designed into the cartridge.
• Humidity, contaminant concentration, work rate, and storage all shorten or extend service life.
• Store cartridges sealed (in their original packaging or a sealed bag) when not in use.
• Unknown or oxygen-deficient atmospheres require a supplied air respirator or SCBA, not cartridges — cartridges do not add oxygen.

Respirator Filter and Cartridge Reviews

In-depth WC Safety reviews of each filter and cartridge, grouped by brand and type.

3M Cartridge Reviews

• 3M 6001 review
• 3M 6002 review
• 3M 6003 review
• 3M 6004 review
• 3M 6005 review
• 3M 6006 review
• 3M 60921 review
• 3M 60922 review
• 3M 60923 review
• 3M 60924 review
• 3M 60925 review
• 3M 60926 review

3M P100 Filter Reviews

• 3M 2091 review
• 3M 2097 review
• 3M 2291 review
• 3M 2297 review
• 3M 7093 review
• 3M 7093C review

Honeywell North Cartridge Reviews

• Honeywell North N75001L review
• Honeywell North N75002L review
• Honeywell North N75003L review
• Honeywell North N75004L review
• Honeywell North 7581P100L review
• Honeywell North 7582P100L review
• Honeywell North 7583P100L review
• Honeywell North 7584P100L review
• Honeywell North 75SCP100L review
• Honeywell North 75SCL review

Honeywell North Filter Reviews

• Honeywell North 7580P100 review
• Honeywell North 75FFP100 review

Important Cartridge Comparisons

Side-by-side comparison guides help when two cartridges look interchangeable. Live comparisons are linked; the rest are listed for reference.

• 3M 6001 vs 3M 60921
• 3M 6006 vs 3M 60926
• 3M 6003 vs 3M 60923
• 3M 2091 vs 3M 2097
• Honeywell North 7583P100L vs 75SCP100L
• Honeywell North 7580P100 vs 75FFP100
• Honeywell North 75SCL vs 75SCP100L
• 3M 6005 vs 3M 60925 (comparison guide coming soon)
• Honeywell North 7581P100L vs 75SCP100L (comparison guide coming soon)

Quick Answers: Choosing a Filter or Cartridge

What respirator filter or cartridge should I choose first?

Start from the airborne hazard, not the brand. Identify the contaminant and concentration from the SDS and your exposure assessment: particulates need a P100 particulate filter, gases and vapors need a matched cartridge, and mixed exposures need a combination cartridge. Then confirm the cartridge fits your respirator's connection system. See how to choose a respirator cartridge.

Is P100 enough?

A P100 particulate filter is enough when the only hazard is a particulate — dust, silica, mold, bioaerosols, or welding fume — and the exposure is within the respirator's protection factor. It captures at least 99.97% of particles but provides zero protection against gases or vapors. If solvents, acid gases, ammonia, or formaldehyde are present, you need a cartridge. See P100 vs N95.

When do I need organic vapor?

Use an organic vapor cartridge when solvents, paints, coatings, adhesives, or many cleaning chemicals release vapor — for example 3M 6001 or Honeywell North N75001L. Add a P100 (an organic vapor/P100 combination) when mist or particulate is also present. Organic vapor cartridges need a written change schedule. See organic vapor vs P100.

When do I need acid gas?

Use an acid gas cartridge for chlorine, hydrogen chloride, sulfur dioxide, and similar acid gases — an organic vapor cartridge does not protect against them. Examples include 3M 6002 and Honeywell North 7582P100L. Above the gas's IDLH, only supplied air or SCBA is acceptable. See best respirator cartridge for chlorine.

When do I need ammonia cartridges?

Ammonia and methylamine require a dedicated ammonia/methylamine cartridge such as 3M 6004 or Honeywell North 7584P100L; organic vapor and acid gas cartridges do not capture ammonia. This is common in refrigeration, agriculture, fertilizer, and wastewater work. See best respirator cartridge for ammonia.

When do I need multi-gas cartridges?

Use a multi-gas cartridge such as 3M 6006 or Honeywell North 75SCP100L when several gas and vapor families may be present and an operator moves between mixed-gas tasks. A multi-gas cartridge is not universal — it only covers the gases on its NIOSH approval, so confirm the exact contaminant list against the SDS. See the Honeywell North cartridge guide.

When do I need supplied air or SCBA?

Use a supplied air respirator or SCBA whenever the atmosphere is unknown, oxygen-deficient (below 19.5% oxygen), or IDLH. No filter or cartridge adds oxygen, and air-purifying respirators are never acceptable when the contaminant or concentration is unknown. See the Respiratory Protection Guide.

Can I mix 3M, Honeywell North, and Secure Click cartridges?

No. 3M bayonet, 3M Secure Click, and Honeywell North use three different, non-interchangeable connection systems, and NIOSH approval certifies each facepiece-and-cartridge combination only as a tested assembly. Mixing brands or mixing Secure Click with bayonet voids the approval and can leave a worker unprotected. Pair the facepiece and cartridge from the same approved system. See are respirator cartridges universal?.

Frequently Asked Questions