Honeywell North N75001L vs N75002L: Organic Vapor vs Acid Gas (2026)

Honeywell North N75001L vs N75002L: Organic Vapor vs Acid Gas (2026)

The Honeywell North N75001L and N75002L are single-hazard cartridges engineered for completely different chemical classes — organic vapors and acid gases respectively. Choosing the wrong one does not provide partial protection; it provides no protection at all against the hazard you face. This guide breaks down exactly what each cartridge covers, who needs each one, and when you need both.

Quick Answer

If you work with solvents, paints, adhesives, or VOCs, the N75001L is your cartridge. If you work with chlorine, hydrogen chloride, sulfur dioxide, or formaldehyde, the N75002L is your cartridge. These cartridges are not interchangeable — OV media does not absorb acid gases, and acid gas media does not absorb organic vapors. If both hazard classes are present in your environment, step up to the N75004L combination cartridge.

N75001L — Organic Vapor:
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N75002L — Acid Gas:
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N75001L vs N75002L at a Glance

Product Profiles

Honeywell North N75001L — Organic Vapor Cartridge

The N75001L is a dedicated organic vapor cartridge using activated carbon media to adsorb hydrocarbon-based gases including aromatic compounds (toluene, xylene, styrene), aliphatic solvents (hexane, heptane, naphtha), ketones (acetone, MEK, MIBK), esters, alcohols, and glycol ethers. It carries NIOSH approval under 42 CFR Part 84 for organic vapors only. There is no filter media for particulates — if your work also generates dusts or mists, pair it with a P100 prefilter or step up to the 7581P100L OV+P100 combination cartridge. At roughly $15 per pair, the N75001L is among the most cost-effective options in the North 75-series lineup for pure solvent environments.

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Honeywell North N75002L — Acid Gas Cartridge

The N75002L is a dedicated acid gas cartridge NIOSH-approved to protect against chlorine (Cl₂), hydrogen chloride (HCl), sulfur dioxide (SO₂), and formaldehyde (HCHO). The impregnated activated carbon media used in acid gas cartridges is chemically distinct from the media in OV cartridges — it is specifically treated to neutralize or adsorb inorganic acids and related reactive gases. Like the N75001L, it provides no particulate filtration. At approximately $27 per pair, the N75002L costs more than the OV cartridge because acid gas media requires chemical impregnation beyond standard activated carbon. Workers in water treatment, chemical processing, and industrial cleaning applications are the primary users.

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What Each Cartridge Protects Against

Key Differences

Different Sorbent Media — Not Interchangeable

This is the most critical distinction. The N75001L uses standard activated carbon (sometimes called activated charcoal) that physically adsorbs non-polar organic molecules through van der Waals forces. The N75002L uses chemically impregnated activated carbon where the carbon substrate is treated with reagents (typically potassium carbonate, potassium iodide, or similar bases) that neutralize acidic gases on contact. These are fundamentally different mechanisms. An OV cartridge in a chlorine environment will not capture Cl₂. An AG cartridge in a toluene environment will not capture toluene. The NIOSH approval scope printed on the cartridge is the boundary of protection — nothing outside that scope is covered. For more on how sorbent media categories work, see our respirator filter types guide.

Cost Difference Reflects Manufacturing Complexity

The N75001L retails around $15 per pair; the N75002L runs approximately $27 per pair. The price gap reflects manufacturing, not quality tiers — acid gas impregnation requires additional chemical processing steps that increase production cost. Both cartridges are built to the same NIOSH approval standards. Choosing the cheaper OV cartridge for an acid gas environment to save money is a life-safety error, not a budget decision.

Target Industries Are Distinct

The N75001L is the dominant choice in trades and manufacturing: automotive painting and refinishing, industrial coating application, fiberglass fabrication, woodworking with solvent finishes, adhesive and sealant application, and petroleum-based product handling. The N75002L is used primarily in process industries and facilities maintenance: water treatment and chlorination systems, industrial cleaning with acidic products, pulp and paper mills (SO₂), chemical manufacturing, and any operation involving hydrochloric acid or similar inorganic acids. Understanding your SDS (Safety Data Sheets) for the chemicals in your environment determines which cartridge class is required — see our respirator cartridge selection guide.

No Particulate Coverage on Either Cartridge

Both the N75001L and N75002L are gas-phase cartridges only. If your work environment also generates airborne particulates — paint overspray, chemical mists, grinding dust, or welding fumes — neither cartridge provides protection against those hazards. For OV work with particulates, step up to the 7581P100L (OV+P100). For acid gas work with particulates, the 7582P100L or 7583P100L (OV+AG+P100) are the appropriate upgrades.

When Both Hazards Are Present — Use the N75004L

If your job site or process involves both organic vapors and acid gases simultaneously — for example, certain chemical stripping operations or mixed industrial environments — neither the N75001L nor the N75002L alone is adequate. In that case, the correct cartridge is the N75004L (OV+AG combination), which houses both sorbent types in a single cartridge body. Alternatively, the 7583P100L adds P100 particulate filtration on top of OV+AG coverage.

Which Should You Buy?

Buy the N75001L if…

• You spray solvent-based paints, primers, or clearcoats
• You work with adhesives, epoxies, or contact cements containing aromatic or aliphatic solvents
• Your SDS lists toluene, xylene, hexane, acetone, MEK, styrene, or similar hydrocarbon-based solvents as the primary hazard
• You handle petroleum-based products, degreasers, or fuel in enclosed or poorly ventilated spaces
• You need the lowest-cost entry point into the North N-series cartridge system for VOC protection

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Buy the N75002L if…

• You work in water treatment facilities where chlorine gas or chlorine dioxide is used for disinfection
• Your operation uses hydrochloric acid (muriatic acid), sulfuric acid fumes, or SO₂ as a process byproduct
• You handle or are exposed to formaldehyde in laboratory, medical, or manufacturing settings
• Your SDS identifies acid gas hazards as the primary inhalation risk
• You work in pulp and paper, metal pickling, or industrial chemical manufacturing where inorganic acids are present

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Best Applications by Work Scenario

Automotive Painting and Body Shop Refinishing

Spray painters applying solvent-based basecoats, primers, or clearcoats are exposed to high concentrations of toluene, xylene, and other aromatic solvents. The N75001L is the correct single-hazard choice here. However, automotive spray environments also generate paint mist particulates — if overspray is present, the 7581P100L OV+P100 provides both gas and particulate coverage in one cartridge. See our organic vapor vs P100 guide for a full breakdown.

Water Treatment and Chlorination Systems

Workers maintaining or operating chlorination equipment, handling sodium hypochlorite, or working near chlorine injection points face acute acid gas hazards. The N75002L is the correct cartridge. Chlorine gas at low ppm concentrations is immediately dangerous to lung tissue; standard OV cartridges provide zero protection. Confirm your air monitoring data before selecting cartridge change-out schedules.

Industrial and Commercial Cleaning

Operations using acid-based cleaners — hydrochloric acid for scale removal, sulfuric acid drain cleaners, or acidic disinfectants — require the N75002L. Workers using solvent-based degreasers or hydrocarbon-based cleaning products require the N75001L. Mixed cleaning environments where both product types are used may require hazard assessment by a Certified Industrial Hygienist to determine the appropriate cartridge class or combination.

Adhesive and Sealant Application

Construction and manufacturing workers applying contact cements, structural adhesives, or polyurethane sealants that list hexane, acetone, MEK, or glycol ethers as ingredients need the N75001L. These are classic OV-class hazards with established NIOSH approval coverage. Review SDS Section 2 and Section 8 to confirm the recommended cartridge type for your specific product.

Chemical Manufacturing and Process Industries

Process operators in environments where SO₂, HCl, or Cl₂ are byproducts of chemical synthesis or treatment require the N75002L. For facilities that handle both process acids and organic solvent-based cleaning or maintenance products, a full hazard assessment is needed — the 7583P100L covers OV, AG, and P100 particulates and is often the right answer for complex industrial environments.

Respirator Compatibility

Both the N75001L and N75002L use the Honeywell North N-Series bayonet connection — also referred to as the North 75-series bayonet mount. This is a proprietary interface specific to Honeywell North respirators. These cartridges are not compatible with 3M bayonet, 3M Secure Click, Moldex, MSA, or any other brand's respirator facepieces.

If you currently use 3M respirators and want equivalent cartridge options, the 3M 6001 OV cartridge is the 3M parallel to the N75001L, and the 3M 6003 covers OV+AG for 3M facepieces. For a cross-brand comparison, see our 3M filter and cartridge guide. Browse all Honeywell North cartridges at the Honeywell North filters collection.

Related Guides

• Honeywell North Cartridge Guide — Full N-Series Overview
• How to Choose a Respirator Cartridge
• Respirator Filter Types Explained (OV, AG, P100, Combination)
• Respirator Cartridge Color Chart — NIOSH Color Codes Decoded
• Organic Vapor vs P100 — Which Do You Need?
• 3M Filter and Cartridge Guide
• P100 vs N95 — What's the Difference?
• Honeywell North 7584P100L — Ammonia/Methylamine+P100 Cartridge

Frequently Asked Questions

Can I use the N75001L to protect against chlorine gas?

No. The N75001L is NIOSH-approved for organic vapors only. Standard activated carbon does not adsorb chlorine gas reliably. Chlorine is an inorganic acid-class gas and requires the N75002L (acid gas) cartridge. Using an OV cartridge in a chlorine environment provides no effective protection. See our filter types guide for a full explanation of sorbent media classes.

Can the N75002L protect against acetone or paint fumes?

No. The N75002L uses impregnated activated carbon designed to neutralize acidic inorganic gases — it is not effective against non-polar hydrocarbon organic vapors like acetone, toluene, or paint solvent components. For solvent and VOC protection, you need the N75001L. Mixing up these cartridges in a solvent-heavy environment is a serious exposure risk.

What cartridge do I need if my environment has both solvents and acid gases?

You need a combination OV+AG cartridge. In the Honeywell North N-series, that is the N75004L. If particulates are also present, the 7583P100L (OV+AG+P100) covers all three hazard classes. Never use a single-class cartridge in a multi-hazard environment — the unprotected hazard will bypass the cartridge completely.

Does the N75002L protect against formaldehyde?

Yes. The N75002L is NIOSH-approved to include formaldehyde (HCHO) in its acid gas approval scope. Formaldehyde is classified as an acid gas hazard under NIOSH cartridge categories. Laboratory workers, medical professionals, and industrial workers with formaldehyde exposure can use the N75002L for that specific hazard.

Do these cartridges include any particulate protection?

No. Both the N75001L and N75002L are gas-only cartridges with no filter media for particulates. If your work also produces dusts, mists, or aerosols, you need either a combination cartridge that includes a filter rating (such as the 7581P100L) or a separately attached prefilter. Check our P100 vs N95 guide for particulate filter options.

Will the N75001L or N75002L work on my 3M respirator?

No. Both cartridges use the Honeywell North N-series bayonet mount, which is incompatible with 3M's bayonet system and 3M Secure Click platform. 3M respirators require 3M-brand cartridges. If you need an OV cartridge for a 3M facepiece, the equivalent is the 3M 6001. See our 3M cartridge guide for the full 3M lineup.

How do I know when to change these cartridges?

Neither the N75001L nor the N75002L have end-of-service-life indicators (ESLIs). Change-out schedules must be determined by a NIOSH-validated ESLI model, your employer's cartridge change-out schedule (CCS), or upon detecting odor or taste breakthrough — noting that some hazardous gases like HCl or Cl₂ can cause lung damage before they are detectible by odor alone. Refer to OSHA 29 CFR 1910.134 requirements and your industrial hygienist for formal change-out guidance.

Can I add a prefilter to the N75001L for dust protection?

The N75001L itself does not accept a snap-on prefilter in the same way as the 7500-series cartridges — the N-series single-class cartridges are designed as standalone gas cartridges. For combined gas and particulate protection on a North respirator, use a combination cartridge such as the 7581P100L (OV+P100) or the 7583P100L (OV+AG+P100).

Is the N75002L approved for hydrogen fluoride (HF)?

The N75002L's NIOSH approval covers chlorine, hydrogen chloride, sulfur dioxide, and formaldehyde. Hydrogen fluoride is a distinct acid gas hazard not included in the standard acid gas approval scope of the N75002L. If HF is present in your environment, consult Honeywell North's technical data to confirm the appropriate cartridge and verify with your industrial hygienist. Do not assume acid gas approval is universal across all inorganic acid vapors.

What is the shelf life of these cartridges?

Honeywell North recommends storing gas cartridges in their original sealed packaging in a cool, dry environment. Cartridges remain serviceable for up to five years from the manufacture date when unopened and properly stored. Once the seal is broken, the activated carbon begins adsorbing ambient contaminants and humidity — the cartridge should be put into service promptly. Never reuse a cartridge from a previous work session without confirming it has not exceeded its change-out schedule.

How does the N75001L compare to the 3M 6001?

Both the Honeywell North N75001L and the 3M 6001 are NIOSH-approved OV-only cartridges with no particulate protection. The key difference is platform: the N75001L mounts on Honeywell North facepieces (bayonet), and the 3M 6001 mounts on 3M facepieces (3M bayonet). They are not interchangeable across brands. Performance for OV protection is comparable between the two within their approved hazard scope. For a full comparison, see our Honeywell North cartridge guide.

Does the N75002L protect against sulfuric acid mist?

The N75002L is approved for sulfur dioxide (SO₂) gas. Sulfuric acid mist (H₂SO₄ aerosol) is a particulate-phase hazard, not a gas-phase hazard, and is not covered by the acid gas cartridge alone. Sulfuric acid mist requires a P100-rated particulate filter, not a gas cartridge. If both SO₂ gas and acid mist are present, you need a combination cartridge with both AG and P100 coverage.

Can these cartridges be used in IDLH (immediately dangerous to life or health) concentrations?

No. APF-class air-purifying respirators including half-face and full-face units with these cartridges are not approved for IDLH environments. IDLH conditions require supplied-air respirators (SARs) or self-contained breathing apparatus (SCBA). Verify the assigned protection factor (APF) for your respirator and confirm that the airborne concentration of the contaminant does not exceed the respirator's approved use range per OSHA 29 CFR 1910.134 and NIOSH guidance.

Are the N75001L and N75002L approved for P100 filtration if used with a prefilter?

These are gas cartridges only and do not carry a P100 filter rating regardless of what is placed in front of them. Particulate protection requires a dedicated NIOSH-approved filter element — either a standalone prefilter like the 7580P100 designed to attach to a gas cartridge, or a combination cartridge that includes both gas and particulate approval within a single NIOSH-certified assembly.

Where can I find the full Honeywell North cartridge lineup?

The complete range of Honeywell North filters and cartridges — including OV, AG, combination, and multi-contaminant options — is available in the Honeywell North filters and cartridges collection. For a detailed breakdown of each cartridge's approval scope and application, see our Honeywell North cartridge guide.

What multi-contaminant option covers the most hazards in the Honeywell North lineup?

The 75SCP100L multi-contaminant+P100 and 75SCL multi-contaminant (without P100) are the broadest-spectrum options in the North N-series lineup, covering OV, acid gases, and additional contaminants. These are the right choice when hazard identification is uncertain or when the environment contains multiple chemical classes. Consult your SDS sheets and industrial hygienist before selecting a cartridge for any multi-hazard environment.