Honeywell North 75852P100L Mercury Vapor Chlorine P100 Respirator Cartridge

Honeywell North 75852P100L Overview

The Honeywell North 75852P100L is a NIOSH-approved P100 combination cartridge that simultaneously protects against mercury vapor (Hg), chlorine gas, and airborne particulate at the P100 efficiency level (≥99.97% for oil and non-oil aerosols). It uses the universal North bayonet connection and mounts on North 5500 half-face, 7700 half-face, 5400 full-face, and 7600 full-face respirators. The 75852P100L is the correct purchase when your workplace hazard assessment identifies mercury vapor and chlorine as co-present gas hazards alongside a particulate fraction — found in chlor-alkali plants, mercury-lamp manufacturing, water treatment, and certain mining operations.

A critical differentiator from most combination cartridges: the 75852P100L incorporates a built-in End-of-Service-Life Indicator (ESLI) for mercury vapor. Rather than relying on a purely scheduled change-out interval, the ESLI provides a visual signal when the mercury sorbent approaches saturation — a significant operational safety advantage in high-exposure environments. For the full Honeywell North cartridge system, see the Honeywell North cartridge guide and the Honeywell North filters and cartridges collection. To understand how cartridge classes map to hazards, consult the how-to-choose-a-respirator-cartridge guide and the respirator filter types explained reference.

Where the 75852P100L Fits in Respirator Selection

Before ordering, confirm two conditions: your facepiece is a Honeywell North bayonet respirator (5500, 7700, 5400, or 7600 series), and your hazard assessment identifies mercury vapor and/or chlorine gas as co-present alongside a particulate fraction.

• North bayonet + mercury vapor + chlorine + particulate → the 75852P100L is the correct cartridge.
• North bayonet + OV + P100 only (no mercury/chlorine) → the 7581P100L OV/P100 cartridge.
• North bayonet + acid gas + OV + P100 (no mercury) → the 7583P100L OV/AG/P100 cartridge.
• North bayonet + ammonia/methylamine + P100 → the 7584P100L ammonia/P100 cartridge.
• North bayonet + multiple gas classes + P100 → the 75SCP100L multi-contaminant P100 cartridge.
• North bayonet + P100 particulate only (no gas) → the 7580P100 P100 cartridge (2-pack) or the 75FFP100 P100 filter.
• Not sure which class covers your hazard? The respirator cartridge color chart decodes NIOSH color-coding by hazard class, and the P100 vs N95 guide explains why the P100 particulate rating matters for these chemical environments.

Who Should Buy the Honeywell North 75852P100L?

Buy the 75852P100L if you run a Honeywell North bayonet half-face or full-face respirator and your workplace hazard assessment identifies mercury vapor and/or chlorine gas as primary hazards — with or without a co-present particulate fraction. The integrated ESLI makes it the preferred selection over general-purpose OV/AG cartridges wherever mercury is a confirmed hazard, because it eliminates the need to guess at cartridge service life.

Choose a different cartridge if:

• Mercury and chlorine are not part of your hazard profile → the 7581P100L (OV/P100) or the 7583P100L (OV/AG/P100) cover standard organic vapor and acid gas environments.
• Ammonia or methylamine is the primary gas hazard → the 7584P100L ammonia/methylamine P100 is the targeted selection.
• Multiple distinct gas classes are present alongside mercury → evaluate the 75SCP100L multi-contaminant P100 cartridge for broader gas-class coverage.
• Gas-only protection is needed without particulate → the N75002L acid gas cartridge handles chlorine without the P100 filter body.
• You use a 3M, Moldex, or any other brand respirator → the North bayonet is not interchangeable with any other brand's connection system; these cartridges will not seat on non-North respirators.

What Does the 75852P100L Protect Against?

What the 75852P100L Does NOT Protect Against

• Organic vapor (toluene, xylene, acetone, etc.)
• Ammonia / methylamine
• Formaldehyde
• Carbon monoxide
• Hydrogen sulfide (H₂S)
• Acid gases beyond chlorine (confirm with IH)
• Oxygen deficiency
• Unknown atmospheres
• IDLH concentrations
• Any non-North bayonet respirator platform

Safety notice: The 75852P100L is approved for mercury vapor, chlorine, and P100 particulate protection on North bayonet respirators only — it provides no organic vapor, ammonia, or formaldehyde protection, and no cartridge or filter adds oxygen to the breathing air. It is incompatible with 3M bayonet, Moldex bayonet, and all other non-North respirators. Oxygen-deficient atmospheres, unknown chemical atmospheres, and immediately dangerous to life or health (IDLH) concentrations require supplied-air respirators or SCBA as specified by a qualified safety professional. Cartridge selection must follow a written workplace hazard assessment under OSHA 1910.134.

Best Applications for the 75852P100L

Chlor-Alkali and Chemical Manufacturing

Chlor-alkali plants produce both elemental mercury and chlorine gas as part of the electrolysis process — the 75852P100L's simultaneous mercury vapor (with ESLI) and chlorine protection makes it the purpose-built cartridge for this environment. The P100 filter layer addresses process dusts and aerosols that may also be present. Browse all North cartridge options in the Honeywell North filters and cartridges collection.

Water Treatment and Chlorination Operations

Chlorine gas is the primary hazard in water treatment disinfection work, and mercury-containing instruments (pressure gauges, flow meters) can create a secondary mercury exposure pathway during maintenance. The 75852P100L addresses both hazards in a single cartridge. For mercury-instrument work specifically, the ESLI visual indicator provides an objective signal for cartridge replacement that a scheduled interval alone cannot match. Consult the cartridge selection guide to confirm suitability for your specific chlorine concentration range.

Mercury Instrumentation and Laboratory Environments

Mercury manometers, thermometers, and switch gear in industrial and laboratory settings create low-level but chronic mercury vapor exposure during handling and disposal. The 75852P100L's ESLI removes the ambiguity of scheduled change-outs in variable-exposure scenarios — when the indicator signals saturation, the cartridge is spent, regardless of elapsed time. The P100 layer handles any particulate generated during equipment disassembly or breakage cleanup. See the best Honeywell North respirator filters and cartridges guide for a full comparison across use cases.

Mining Operations with Mercury and Particulate Co-Exposure

Certain gold ore processing and mining operations involve mercury amalgamation, creating simultaneous mercury vapor and dust exposures. The 75852P100L's triple protection class — mercury vapor, chlorine, P100 particulate — addresses both the vapor and dust fractions in a single cartridge change. The best respirator for silica dust guide covers particulate selection in mining contexts; confirm mercury and chlorine co-exposure with your industrial hygienist before specifying this cartridge.

Honeywell North 75852P100L Pros & Cons

Compatible Honeywell North Respirators

The 75852P100L uses the universal Honeywell North bayonet connection shared by all 75-series and N750-series cartridges and filters. It fits only Honeywell North respirators with this bayonet — it is not compatible with 3M bayonet respirators, Moldex bayonet respirators, or any other brand's connection system.

The North universal bayonet is shared across all 75-series cartridges and filters — the same connection that mounts a 75FFP100 particulate filter also accepts the 75852P100L combination cartridge. Browse all compatible cartridges in the Honeywell North respirator filters and cartridges collection.

75852P100L vs Other Honeywell North P100 Combination Cartridges

75852P100L vs 7582P100L (Acid Gas / P100)

Both cartridges include chlorine protection and a P100 particulate layer, making this the most common substitution error in procurement. The key difference: the 7582P100L is an acid gas / P100 cartridge with no mercury sorbent and no ESLI. If mercury vapor is a confirmed hazard at your site, the 7582P100L is not an adequate substitute — choose the 75852P100L specifically for its mercury sorbent and ESLI. If mercury is absent and your hazard is chlorine or other acid gases plus particulate, the 7582P100L is the lower-cost, simpler selection. Verify your hazard scope with your industrial hygienist before substituting.

75852P100L vs 75SCP100L (Multi-Contaminant / P100)

The 75SCP100L is a broader-spectrum multi-contaminant P100 cartridge that covers a wider range of gas classes. If your hazard assessment identifies organic vapor, multiple acid gases, or other gas classes alongside mercury and chlorine, the 75SCP100L may provide more comprehensive protection in a single cartridge — but review its specific approval scope and whether it carries an ESLI for mercury before specifying it as a drop-in replacement. The 75852P100L remains the preferred choice when mercury vapor + chlorine + P100 is the confirmed, bounded hazard profile, because its ESLI is purpose-built for that environment. Consult the Honeywell North cartridge guide for a full side-by-side breakdown.

75852P100L vs 7581P100L (Organic Vapor / P100)

These two cartridges address entirely different gas hazard classes. The 7581P100L uses an organic vapor sorbent for solvent vapors (toluene, xylene, acetone, etc.) and provides no mercury or chlorine protection. The 75852P100L uses a mercury/chlorine sorbent and provides no organic vapor protection. These are not interchangeable — selecting the wrong cartridge for your gas hazard class provides no protection against the unaddressed hazard. Use the respirator cartridge color chart to verify the correct NIOSH color-coding for your hazard before ordering.

75852P100L Quick Answers

What is the Honeywell North 75852P100L?

The Honeywell North 75852P100L is a NIOSH-approved combination respirator cartridge that protects against mercury vapor (Hg) with an integrated end-of-service-life indicator (ESLI), chlorine gas, and airborne particulate at the P100 efficiency level (≥99.97%). It mounts on the North universal bayonet and fits all North 5500, 7700, 5400, and 7600 series respirators. It does not protect against organic vapors, ammonia, or oxygen deficiency.

What does the ESLI on the 75852P100L do?

The End-of-Service-Life Indicator (ESLI) on the 75852P100L is a built-in sensor that provides a visual signal when the mercury sorbent in the cartridge is approaching saturation. This removes reliance on a fixed time-based change-out schedule for mercury vapor — the cartridge signals its own replacement need based on actual sorbent capacity consumed, which varies with exposure concentration and breathing rate. Most other combination cartridges require a scheduled interval alone; the ESLI provides an objective, real-time indication for mercury specifically.

What respirators does the 75852P100L fit?

The 75852P100L fits all Honeywell North respirators that use the North universal bayonet connection: the 5500 series (half-face), 7700 series (half-face), 5400 series (full-face), and 7600 series (full-face). It is not compatible with 3M bayonet respirators, Moldex bayonet respirators, MSA, Draeger, Scott, or any other non-North brand.

Is the 75852P100L the same as a general acid gas / P100 cartridge?

No. A general acid gas / P100 cartridge such as the 7582P100L does not contain mercury sorbent and has no ESLI. The 75852P100L is specifically formulated for mercury vapor with chlorine as a co-hazard. If mercury vapor is a confirmed hazard at your site, substituting a general acid gas cartridge is not an equivalent replacement — mercury will pass through without being captured.

Can the 75852P100L be used for organic solvent vapors?

No. The 75852P100L's sorbent bed is formulated for mercury vapor and chlorine — not for organic vapor compounds such as toluene, xylene, acetone, or MEK. If organic solvents are a co-hazard alongside mercury, your industrial hygienist must evaluate whether a combination cartridge addressing all hazards in that environment exists, or whether a supplied-air solution is required.

How many cartridges come in a 75852P100L order?

The 75852P100L is sold as a single cartridge at $66.18. A standard dual-cartridge half-face or full-face respirator requires two cartridges — order the quantity that matches your respirator model. Confirm the pack configuration on the current listing before placing a bulk order.

Honeywell North 75852P100L Specifications

Helpful Buying Guides

• Honeywell North Cartridge Guide — Full System Reference
• Best Honeywell North Respirator Filters and Cartridges
• How to Choose a Respirator Cartridge
• Respirator Filter Types Explained
• Respirator Cartridge Color Chart — NIOSH Color Codes by Hazard Class
• P100 vs N95 — What's the Difference and Which Do You Need?
• Organic Vapor vs P100 — Understanding the Difference
• Best Respirator for Welding Fumes

Honeywell North 75852P100L Frequently Asked Questions

What is the Honeywell North 75852P100L used for?

The 75852P100L is used in environments where mercury vapor (Hg) and chlorine gas are confirmed airborne hazards, along with a co-present particulate fraction. Typical applications include chlor-alkali processing, water treatment chlorination, mercury instrument handling, and certain mining operations involving mercury amalgamation. It is not a general-purpose OV or acid gas cartridge.

Does the 75852P100L protect against organic vapors like toluene or acetone?

No. The 75852P100L's sorbent is formulated specifically for mercury vapor and chlorine. It provides no protection against organic vapor compounds such as toluene, xylene, hexane, acetone, or MEK. For organic vapor plus P100 particulate protection on a North respirator, use the 7581P100L instead.

What North respirators is the 75852P100L compatible with?

The 75852P100L fits all Honeywell North respirators that use the North universal bayonet: the 5500 series and 7700 series half-face masks, and the 5400 series and 7600 series full-face masks. It will not fit any 3M respirator, any Moldex respirator, or any other non-North brand — the North bayonet is brand-specific and not interchangeable.

Can I use the 75852P100L on a 3M respirator?

No. The North universal bayonet connection is mechanically incompatible with 3M's standard bayonet and 3M's Secure Click bayonet. Attempting to force-fit a North cartridge onto a 3M respirator is unsafe and will not create a reliable seal. Use only Honeywell North cartridges on North respirators and 3M cartridges on 3M respirators. For 3M-compatible P100 filters and cartridges, see the 3M respirator filters and cartridges collection.

How does the ESLI on the 75852P100L work?

The ESLI (End-of-Service-Life Indicator) is an integrated visual sensor that changes appearance when the mercury sorbent in the cartridge approaches its capacity limit. Rather than relying solely on a scheduled time-based change-out interval — which may not accurately reflect actual exposure at variable mercury concentrations — the ESLI provides a direct indication that the cartridge needs replacement. Follow your employer's respiratory protection program procedures for ESLI use and interpretation.

Is the 75852P100L the same as the 7582P100L?

No. The 7582P100L is an acid gas / P100 cartridge — it covers chlorine and other acid gases with P100 particulate protection but contains no mercury sorbent and has no ESLI. The 75852P100L is specifically formulated for mercury vapor (with ESLI) plus chlorine plus P100. If mercury is a confirmed hazard, the 7582P100L is not an equivalent replacement for the 75852P100L.

How many cartridges are in the 75852P100L package?

The 75852P100L is sold as a single cartridge at $66.18. A standard half-face or full-face respirator uses two cartridges simultaneously — order two units to outfit one respirator. Confirm the pack configuration on the current listing before placing a bulk order for your program.

When should I replace the 75852P100L?

Replace the 75852P100L when the ESLI indicates mercury sorbent saturation, when you detect odor or taste breakthrough for any component, when the cartridge is physically damaged, or per your employer's scheduled change-out interval under OSHA 1910.134. The ESLI addresses mercury service life specifically — the chlorine and P100 components do not have a visual indicator, so your written respiratory protection program must address their change-out schedule independently.

Does the 75852P100L protect against ammonia?

No. Ammonia and methylamine protection is not included in the 75852P100L's approval scope. For ammonia environments on a North respirator, the 7584P100L (ammonia/methylamine P100) is the correct selection. If both mercury/chlorine and ammonia are present, consult your industrial hygienist — a single cartridge covering all those hazards simultaneously may not exist in the North line, and a different respiratory protection strategy may be required.

What is the P100 rating on the 75852P100L?

P100 is the highest NIOSH particulate efficiency class, capturing at least 99.97% of airborne particles — including oil-based aerosols, mists, and fumes. The "P" designation means the filter media is oil-proof, making it suitable for environments where oil mists or aerosols are present alongside the gas hazards. By comparison, N95 filters capture 95% of non-oil particles and are not rated for oil mist environments.

Can the 75852P100L be used for silica dust or welding fumes?

The P100 filter layer in the 75852P100L is rated to capture respirable crystalline silica dust and metal fumes at ≥99.97% efficiency. However, if silica dust or welding fumes are the primary hazards with no mercury or chlorine co-hazard, the 75852P100L's specialty sorbent is unnecessarily expensive — the 7580P100 P100 cartridge or the 75FFP100 P100 filter provide equivalent particulate protection at a lower cost when no gas hazard is present. See the best respirator for silica dust guide for selection guidance.

Does the 75852P100L require a prefilter?

No. The 75852P100L is a fully integrated combination cartridge with the P100 particulate filter media built into the cartridge body — no separate prefilter pad is required. The North 7504R95 and 7506-series prefilters are designed for use with gas-only cartridges (such as the N75001L through N75004L series) that lack an integrated particulate layer; they are not used with the 75-series P100 combination cartridges.

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