Honeywell North 7581P100L Organic Vapor / P100 Respirator Cartridge (Pair) — NIOSH Approved

Honeywell North 7581P100L Overview

The Honeywell North 7581P100L is a NIOSH-approved Organic Vapor / P100 combination respirator cartridge that simultaneously adsorbs organic solvent vapors and captures ≥99.97% of airborne oil and non-oil particulates — including paint mist, dust, and welding fume. It attaches via the North universal bayonet connection and is sold as a pair (one left, one right) for use on North 5500 and 7700 half-face respirators and North 5400 and 7600 full-face respirators. This is the right cartridge when your hazard assessment identifies both an organic vapor component and a particulate co-hazard on the same North facepiece.

The 7581P100L fits only the North bayonet system — it is not compatible with 3M bayonet, Moldex bayonet, or any other brand's connection interface. For an overview of the full North cartridge family, see the Honeywell North cartridge guide, or browse the complete Honeywell North respirator filters and cartridges collection. For platform-agnostic selection logic, the how to choose a respirator cartridge guide walks through the full hazard-to-cartridge decision tree.

Where the 7581P100L Fits in Respirator Selection

Before ordering, confirm that your facepiece is a Honeywell North 5500, 7700, 5400, or 7600 — and that your hazard assessment flags both organic vapor and particulate as co-present risks. If either condition is not met, a different cartridge is the correct choice.

• North respirator + OV + particulate → the 7581P100L is the right cartridge.
• North respirator + OV only, no particulate → the N75001L OV-only cartridge at a lower cost.
• North respirator + particulate only, no vapor → the 75FFP100 P100 filter or a prefilter with holder.
• North respirator + OV + acid gas + P100 → the 7583P100L (OV/AG/P100).
• North respirator + OV + acid gas (no particulate) → the N75003L OV/AG cartridge.
• North respirator + ammonia + P100 → the 7584P100L ammonia/P100 cartridge.
• Not sure whether you need OV, P100, or both? See the organic vapor vs P100 guide and respirator filter types explained.

Who Should Buy the Honeywell North 7581P100L?

Buy the 7581P100L if you run a North 5500, 7700, 5400, or 7600 respirator and your workplace hazard assessment identifies organic solvent vapor alongside a particulate hazard — the classic combination in automotive refinishing, industrial painting, spray coating, woodworking with solvent stains, and fiberglass laminating.

Choose a different cartridge if:

• Acid gases (chlorine, HCl, SO₂) are a co-hazard → the 7583P100L (OV/AG/P100) adds acid gas protection.
• Ammonia or methylamine are present → the 7584P100L (ammonia/methylamine/P100).
• Mercury vapor or chlorine is the primary gas hazard → the 75852P100L (mercury/chlorine/P100).
• You need broad multi-contaminant protection → the 75SCP100L multi-contaminant P100 cartridge.
• Your hazard is particulate only → the 75FFP100 P100-only filter or a prefilter pad costs less and weighs less.
• You use a 3M, Moldex, or any non-North respirator → North bayonet cartridges will not seat on other brands' facepieces.

What Does the 7581P100L Protect Against?

What the 7581P100L Does NOT Protect Against

• Acid gases (chlorine, HCl, SO₂)
• Ammonia / methylamine
• Mercury vapor
• Carbon monoxide
• Hydrogen fluoride
• Formaldehyde (at high concentrations)
• Unknown gas mixtures
• Oxygen deficiency
• IDLH atmospheres
• Carbon dioxide

Safety: The 7581P100L is a combination OV/P100 cartridge — it does not protect against acid gases, ammonia, mercury vapor, or carbon monoxide, and no air-purifying cartridge adds oxygen. It fits only the Honeywell North bayonet system and will not seat on 3M, Moldex, or any other brand's respirator. Oxygen-deficient, unknown-composition, and immediately dangerous to life or health (IDLH) atmospheres require supplied-air or SCBA equipment selected by a qualified safety professional. Cartridge selection must follow a written workplace hazard assessment per OSHA 1910.134.

Best Applications for the 7581P100L

Automotive Refinishing & Spray Painting

Automotive spray booths produce both solvent vapors from paint solvents and atomized paint mist — the exact dual-hazard the 7581P100L is built for. The OV layer handles toluene, xylene, MEK, and lacquer thinner vapors while the P100 filter captures the aerosol particles. Confirm that your specific solvent system falls within the organic vapor class. Browse North-compatible facepieces and the full Honeywell North filters and cartridges collection to build a complete respiratory protection system. For cartridge selection guidance specific to painting, see best Honeywell North cartridge for paint fumes.

Industrial Coating, Lacquer & Adhesive Work

Industrial coating operations involving solvent-borne lacquers, epoxy coatings, polyurethane finishes, and contact-cement adhesives generate both vapor and aerosol hazards. The 7581P100L covers both in a single cartridge swap. If acid gases (e.g. from curing agents or chemical processes) are also identified in the risk assessment, upgrade to the 7583P100L (OV/AG/P100).

Woodworking with Solvent Stains & Finishes

Wood finishing operations that use oil-based stains, varnishes, or catalyzed finishes produce both solvent vapor and fine wood dust or finish mist. The 7581P100L handles both hazard streams on a North respirator. For sanding operations where silica-bearing dust is the primary concern, the best Honeywell North cartridge for silica dust guide covers P100 selection for that specific hazard. See also best respirator for silica dust 2026 for full-system recommendations.

Fiberglass Laminating & Resin Work

Styrene and other monomers from polyester and vinyl ester resins are organic vapors; airborne glass fibre and resin particulate are captured by the P100 layer. The 7581P100L covers the combined hazard profile typical in marine laminating and composites fabrication, provided the specific resins are within the organic vapor class. Verify with your SDS and industrial hygienist.

Welding & Metal Fabrication (Vapor Co-Hazard)

In welding environments where solvent-based parts cleaning, primer, or coating work accompanies metal fume generation, the 7581P100L's P100 layer captures metal fume particulate and the OV layer addresses solvent co-exposure. For welding-fume-only applications with no solvent vapor, the 75FFP100 P100 filter is a lighter, lower-cost option. See the best respirator for welding fumes guide for full guidance.

Honeywell North 7581P100L Pros & Cons

Compatible Honeywell North Respirators

The 7581P100L uses the North universal bayonet connection and is compatible with all Honeywell North bayonet facepieces. It does not fit 3M bayonet, Moldex bayonet, or any other brand's respirator mount — state this explicitly to workers before deployment.

The North universal bayonet is a brand-specific connection system. North cartridges and non-North cartridges are not interchangeable even if they appear similar in size. Never force a cartridge onto a facepiece — verify the connection before each use. Browse the full Honeywell North respirator filters and cartridges collection for all compatible consumables.

7581P100L vs Other Honeywell North Cartridges

7581P100L vs N75001L

Both cartridges protect against organic vapor on North respirators, but the N75001L is an OV-only gas cartridge with no particulate filter layer. Choose the N75001L when your hazard assessment confirms vapor with no significant particulate co-hazard — it costs less and weighs less. Choose the 7581P100L when dust, mist, or fumes are also present and a single cartridge covering both hazards is required. See the organic vapor vs P100 guide for the decision logic.

7581P100L vs 7583P100L

This is the most important upgrade decision in the North OV/P100 line. Both the 7581P100L and the 7583P100L provide OV + P100 protection, but the 7583P100L adds an acid gas layer (covering chlorine, HCl, SO₂, and related gases). If your SDS review or industrial hygiene assessment identifies any acid gas co-hazard, select the 7583P100L. If the gas hazard is confirmed OV-only, the 7581P100L delivers equivalent OV + P100 protection at a lower cost per pair. Consult the respirator cartridge color chart to confirm cartridge class color codes.

7581P100L vs 75FFP100

The 75FFP100 is a P100-only particulate filter — it captures ≥99.97% of airborne particles but contains no carbon sorbent and provides zero vapor protection. Choose the 75FFP100 for purely particulate environments (dry sanding, grinding, silica dust) where no solvent vapor is present. Choose the 7581P100L whenever a confirmed organic vapor hazard accompanies the particulate exposure. The P100 vs N95 guide explains the particulate class distinctions in detail.

7581P100L vs 75SCP100L

The 75SCP100L is a multi-contaminant P100 cartridge designed for environments with complex or mixed gas hazards — OV, acid gas, and other contaminants simultaneously. When your hazard profile is limited to organic vapor + particulate and no other gas class is present, the 7581P100L is the simpler, more cost-effective choice with straightforward end-of-service-life management. Choose the 75SCP100L when the gas hazard mix is broader or less well-defined. See the best Honeywell North respirator filters and cartridges guide for side-by-side recommendations by application.

Honeywell North 7581P100L Quick Answers

What is the Honeywell North 7581P100L?

The Honeywell North 7581P100L is a NIOSH-approved Organic Vapor / P100 combination respirator cartridge for the North bayonet platform. It simultaneously adsorbs organic solvent vapors and filters ≥99.97% of airborne oil and non-oil particulates. It is sold as a pair and fits North 5500, 7700, 5400, and 7600 respirators.

What respirators does the 7581P100L fit?

The 7581P100L fits Honeywell North 5500 and 7700 half-face respirators and North 5400 and 7600 full-face respirators via the North universal bayonet connection. It is not compatible with 3M bayonet respirators, Moldex respirators, or any other brand.

Does the 7581P100L protect against acid gases?

No. The 7581P100L covers organic vapor and P100 particulate only. For acid gas co-protection alongside OV and P100, the correct North cartridge is the 7583P100L (OV/AG/P100).

What is the NIOSH rating of the 7581P100L?

The 7581P100L is NIOSH-approved as an Organic Vapor (OV) / P100 combination cartridge. The P100 designation requires ≥99.97% filtration efficiency for both oil and non-oil aerosols under 42 CFR Part 84.

How many cartridges come in a 7581P100L pack?

The 7581P100L is sold as one pair — two cartridges, one for each side of the respirator. Confirm the pack quantity on the current listing before placing a large order.

Can I use the 7581P100L for spray painting?

Yes — spray painting is a primary application. The OV layer adsorbs solvent vapors from paint and thinner while the P100 layer captures atomized paint mist. Confirm that your paint's SDS lists solvents within the organic vapor class and that no acid gas or ammonia co-hazard is present.

When should I replace the 7581P100L?

Replace the 7581P100L when you detect odor or taste breakthrough (indicating OV capacity is exhausted), when the cartridge is physically damaged, soiled, or difficult to breathe through, or on your employer's scheduled change-out interval established per OSHA 1910.134. The cartridge has no built-in ESLI — a written change-schedule is required for the OV layer.

Honeywell North 7581P100L Specifications

Helpful Buying Guides

• Honeywell North Cartridge Guide
• Best Honeywell North Respirator Filters and Cartridges
• How to Choose a Respirator Cartridge
• Organic Vapor vs P100 — Which Do You Need?
• Respirator Filter Types Explained
• P100 vs N95 — What's the Difference?
• Respirator Cartridge Color Chart
• Best Honeywell North Cartridge for Paint Fumes
• Best Respirator for Silica Dust 2026
• Best Respirator for Welding Fumes

Honeywell North 7581P100L Frequently Asked Questions

What does the Honeywell North 7581P100L protect against?

The 7581P100L protects against organic vapors (toluene, xylene, hexane, acetone, MEK, esters, alcohols, and glycol ethers) and airborne particulate at the P100 level (≥99.97% efficiency, oil-proof). It does not protect against acid gases, ammonia, mercury vapor, or oxygen deficiency.

Which Honeywell North respirators does the 7581P100L fit?

The 7581P100L fits North 5500 and 7700 half-face respirators and North 5400 and 7600 full-face respirators. All use the North universal bayonet connection. It does not fit 3M, Moldex, or any other brand's facepiece.

Is the 7581P100L compatible with 3M respirators?

No. The 7581P100L uses the North universal bayonet, which is a different connection system from the 3M bayonet. North cartridges will not seat securely on 3M facepieces and must never be forced. Use 3M-specific cartridges with 3M respirators — see the 3M respirator filters and cartridges collection for those options.

How is the 7581P100L different from the 7582P100L?

The 7581P100L provides organic vapor + P100 protection. The 7582P100L provides acid gas + P100 protection — without OV coverage. Choose based on whether your primary gas hazard is an organic vapor (use 7581P100L) or an acid gas such as chlorine or HCl (use 7582P100L).

What is the difference between the 7581P100L and the 7583P100L?

The 7583P100L adds an acid gas layer to the OV + P100 combination, covering chlorine, HCl, SO₂, and related gases. If your hazard assessment confirms no acid gas is present, the 7581P100L provides equivalent OV + P100 protection at a lower cost per pair.

Can the 7581P100L be used for spray painting with solvent-based paint?

Yes — this is one of the primary intended applications. The OV layer handles solvent vapor from the paint and thinner while the P100 layer captures atomized paint mist. Verify that the paint's SDS identifies the solvents as organic vapors and that no acid gas or ammonia co-hazard is present in the operation.

Does the 7581P100L work for welding fume?

The P100 layer captures metal fume particulate generated by welding. If solvent vapors from parts cleaning, primers, or coatings are also present in the welding environment, the combined OV + P100 coverage is appropriate. For welding fume with no solvent vapor, the lighter 75FFP100 P100-only filter may be a more practical choice.

Is the 7581P100L good for silica dust protection?

Yes — the P100 layer meets the highest particulate filtration standard (≥99.97% efficiency) and is appropriate for respirable crystalline silica (RCS) control. If silica dust is the sole hazard and no vapor is present, the 75FFP100 P100 filter is a lighter option. See the best Honeywell North cartridge for silica dust guide for full context.

How long does the 7581P100L last?

Service life depends on contaminant concentration, temperature, relative humidity, and breathing rate. The P100 particulate layer can be used until it is damaged or breathing resistance increases noticeably. The OV layer has no visual end-of-service-life indicator — replace it on a written change-out schedule established per OSHA 1910.134, or at first detection of odor or taste. Your employer's industrial hygienist should set the change-out interval for your specific exposure.

Are prefilter pads available for the 7581P100L?

The 7581P100L already includes an integrated P100 particulate filter — separate prefilter pads are not required. Honeywell North prefilter pads (7504R95, 7506N95, 7506N99, 7506R95) are used with gas-only North cartridges that lack an integrated particulate layer. See the full range of North prefilter options if you are using a gas-only cartridge and need to add particulate protection.

What is the 7581P100L price?

Current pricing is $25.59 per pair (two cartridges) via the Amazon affiliate link on this page — confirm the current price on the listing before ordering as Amazon pricing may vary. The tag on this page is wcsafety04-20.

Does the 7581P100L require a prefilter pad for dust protection?

No. Unlike gas-only North cartridges that require a separate prefilter pad to add particulate protection, the 7581P100L has an integrated P100 particulate filter built into the cartridge body. No additional prefilter is needed or should be added.

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