🔍 Click to zoom
MSA MerSorb/P100 Respirator Cartridge — Mercury Vapor And Chlorine/P100 (MSA Comfo)
$322.99
Final price set by Amazon · may vary
EDITORIAL REVIEW: 4.5/5WC Safety Review — MSA MerSorb/P100 Respirator Cartridge Best For: mercury vapor and chlorine with dust in one cartridge on MSA Comfo respirators. Not For: organic vapor, ammonia or formalde...
Check Price on Amazon🔒 Amazon Associate · You pay the same price · We earn a small commission
Zero Sponsored ListingsNo paid placements. Every recommendation is based on compliance, build quality, and field performance.
Curated SelectionExpert-chosen safety gear
Independently ReviewedUnbiased assessments — no manufacturer input
Built for Industrial BuyersSourced and reviewed for safety managers, procurement teams, and field supervisors.
EDITORIAL REVIEW: 4.5/5WC Safety Review — MSA MerSorb/P100 Respirator Cartridge
Best For: mercury vapor and chlorine with dust in one cartridge on MSA Comfo respirators.
Not For: organic vapor, ammonia or formaldehyde. It covers mercury vapor and chlorine and particulate only.
Bottom Line: the do-it-all mercury vapor and chlorine-plus-dust cartridge for the MSA Comfo system. If there is no dust, the gas-only GMB/P100 is cheaper.
Editorial assessment by the WC Safety Editorial Team. Scoring reflects published MSA specifications, NIOSH approval, application fit and category expertise. WC Safety did not laboratory-test this product.
CHECK PRICE ON AMAZON →SHOP MSA CARTRIDGES →
As an Amazon Associate, WC Safety earns from qualifying purchases. Full affiliate disclosure.
Read our hands-on MSA MerSorb/P100 review for field-tested buyer notes.
MSA MerSorb/P100 Respirator Cartridge Overview
The MSA MerSorb/P100 is a NIOSH-approved combination cartridge for MSA Comfo respirators that protects against mercury vapor and chlorine AND airborne particulate in one unit. The built-in P100 filter captures at least 99.97% of particles, so the MSA MerSorb/P100 covers gas plus dust without a separate prefilter. Start with the cartridge selection guide, the organic vapor vs P100 guide and the color chart.
As a Comfo combination cartridge it fits the MSA Comfo Classic, Comfo II, Ultra-Twin and Ultra-Elite, and belongs to the MSA respirator filters and cartridges range. Choose the gas-only GMB/P100 if there is no dust; the MSA MerSorb/P100 when gas and particulate are both present.
Where the MSA MerSorb/P100 Fits in Cartridge Selection
The MSA MerSorb/P100 handles mercury vapor and chlorine and airborne particulate. If you are weighing gas-only versus combination cartridges, our filter types explained and Comfo vs Advantage guides help you decide.
Who Should Buy the MSA MerSorb/P100?
Buy it if your work mixes mercury vapor and chlorine with dust or mist on an MSA Comfo facepiece. Choose the gas-only GMB/P100 if there is no dust. For a broader gas mix, see the MSA Comfo GME/P100 multi-gas cartridge.
What Does the MSA MerSorb/P100 Protect Against?
| Hazard | Fit | Buyer guidance |
|---|---|---|
| Mercury Vapor And Chlorine (mercury vapor and chlorine) | Yes | Gas side — the sorbent bed. |
| Dust, mist, fume, lead (particulate) | Yes — P100 | Built-in P100 filter, ≥99.97%, oil-proof. |
| Organic Vapor, Ammonia Or Formaldehyde | No | Use the matching MSA cartridge for that hazard. |
What the MSA MerSorb/P100 Does NOT Protect Against
The MSA MerSorb/P100 does not stop organic vapor, ammonia or formaldehyde. For a different gas, match the MSA cartridge to the hazard; for a broad mix use the GME/P100 multi-gas version.
No air-purifying cartridge makes a dangerous atmosphere safe. Never use the MSA MerSorb/P100 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
Mercury handling & remediation
Mercury vapor and chlorine with dust; the ESLI window helps time mercury change-out.
Chlor-alkali & labs
Where chlorine and mercury vapor appear with particulate.
Pros & Cons
Pros
mercury vapor and chlorine + P100 in one cartridge · ≥99.97% oil-proof particulate · no separate prefilter · genuine MSA Comfo fit · ESLI for mercury
mercury vapor and chlorine + P100 in one cartridge · ≥99.97% oil-proof particulate · no separate prefilter · genuine MSA Comfo fit · ESLI for mercury
Cons
costs more than the gas-only version · Comfo connection only · one gas class on the gas side
costs more than the gas-only version · Comfo connection only · one gas class on the gas side
MSA MerSorb/P100 vs Other MSA Cartridges
| Cartridge | Protects against |
|---|---|
| MSA GMB/P100 | AG + P100 |
| MSA GME/P100 | Multi-gas + P100 |
| MSA GMI/P100 | Radioiodine + P100 |
| MSA LP P100 | P100 only |
MSA MerSorb/P100 vs the Alternatives
How it compares to the closest MSA options:
- MerSorb/P100 vs GMB/P100: the MerSorb adds mercury vapor and an ESLI; the GMB/P100 is acid gas + P100 without mercury.
- MerSorb/P100 vs GME/P100: the MerSorb is the mercury specialist; the GME/P100 is a broad gas mix without mercury.
- MerSorb/P100 (Comfo) vs Advantage MerSorb: same chemistry, different facepiece system.
MSA MerSorb/P100 Quick Answers
Does the MSA MerSorb/P100 need a separate filter?
No — the P100 filter is built in; there is no prefilter or retainer to add.
Does the MSA MerSorb/P100 fit my MSA respirator?
It fits the MSA Comfo family; check your facepiece in the MSA half-mask and full-face ranges.
Is the MSA MerSorb/P100 reusable?
The cartridge is used until its gas or filter service life is reached; the respirator is reusable across many changes.
MSA MerSorb/P100 Specifications
| Gas class | Mercury Vapor And Chlorine |
| Particulate filter | P100 — ≥99.97%, oil-proof (built in) |
| NIOSH markings | Orange (mercury) + magenta (P100) |
| Connection | MSA Comfo |
| Sold as | Each |
| End-of-service-life indicator | Yes (mercury) |
Compatible MSA Respirators
The MSA MerSorb/P100 uses the MSA Comfo threaded-bayonet connection, so it mounts on the Comfo Classic half-mask and Ultra-Elite full-face respirators (and the Comfo II and Ultra-Twin). It is not interchangeable with the MSA Advantage series, and does not fit 3M, Honeywell North or other brands.
| Respirator | Type | Compatible? |
|---|---|---|
| MSA Comfo Classic | Half mask | Yes — Comfo bayonet |
| MSA Comfo II | Half mask | Yes — Comfo bayonet |
| MSA Ultra-Elite | Full face | Yes — Comfo bayonet |
| MSA Ultra-Twin | Full face | Yes — Comfo bayonet |
| MSA Advantage series | Half / full | No — different connection |
| 3M / Honeywell North | Half / full | No (not compatible) |
Helpful Buying Guides
- MSA Comfo vs Advantage
- How to choose a respirator cartridge
- MSA vs 3M respirator cartridges
- MSA vs Honeywell North cartridges
- organic vapor vs P100
- respirator cartridge color chart
- respirator filter types explained
MSA MerSorb/P100 Frequently Asked Questions
What does the MSA MerSorb/P100 protect against?
The MSA MerSorb/P100 is a mercury vapor and chlorine / P100 combination cartridge. It captures mercury vapor and chlorine and filters at least 99.97% of airborne particulate. It does not protect against organic vapor, ammonia or formaldehyde.
Does the MSA MerSorb/P100 filter dust?
Yes. The MSA MerSorb/P100 has a built-in P100 filter that captures at least 99.97% of airborne particles, including oil-based mists, so no separate prefilter is needed.
Which respirators does the MSA MerSorb/P100 fit?
It uses the MSA Comfo threaded-bayonet connection (Comfo Classic, Comfo II, Ultra-Twin, Ultra-Elite). It does not fit the Advantage series.
What does P100 mean on the MSA MerSorb/P100?
P100 is the highest NIOSH particulate rating: oil-proof and at least 99.97% efficient. The MSA MerSorb/P100 carries a magenta P100 marking alongside its gas-class band.
Is the MSA MerSorb/P100 NIOSH-approved?
Yes, under 42 CFR Part 84 for its listed gases and P100 particulate. It includes an end-of-service-life indicator (ESLI) for mercury. Verify against the NIOSH Certified Equipment List.
How is the MSA MerSorb/P100 sold?
This listing is the Each. Use Request a Quote for case pricing.
How often should I replace the MSA MerSorb/P100?
Replace the gas portion on a change-out schedule or at odor breakthrough, and replace when breathing through the P100 filter becomes noticeably harder.
Does the MSA MerSorb/P100 need a separate filter?
No. The P100 particulate filter is built in, so there is no prefilter or retainer to add.
What is the difference between the MSA MerSorb/P100 and the gas-only version?
Choose the gas-only GMB/P100 if there is no dust; the MSA MerSorb/P100 when gas and particulate are both present.
What color band is the MSA MerSorb/P100?
The markings are orange (mercury) + magenta (p100); confirm both your gas class and the P100 on the color chart.
Is this the genuine MSA MerSorb/P100 cartridge?
Yes. WC Safety sells authentic, NIOSH-approved MSA MerSorb/P100 cartridges through legitimate supply channels.
How should I store the MSA MerSorb/P100?
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.
Written by Steven Eaton, WC Safety Editorial — industrial respiratory protection desk. Reviewed by the WC Safety Editorial Team. Specifications sourced from MSA Safety published data and verified against the NIOSH Certified Equipment List. Compare the range in MSA respirator filters & cartridges or read MSA Comfo vs Advantage.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Always verify cartridge compatibility and follow your written respiratory protection program. General information, not medical or regulatory advice.
Brand / Vendor
MSA Safety
Model / SKU
815185
Product Type
Respirator Cartridge
Price
$322.99 (Amazon)
Availability
Check current availability on Amazon
No Paid Placements
Every product earns its place based on safety credentials and field performance, not advertising spend.
Industrial Grade Only
Products sourced for professional use in manufacturing, construction, and industrial environments.
Compliance Verified
Every product listed on WC Safety is reviewed for standards compliance and safety credentials before publication.
Sourced for Professionals
Gear selected for safety managers, procurement teams, and field supervisors — not casual consumers.
Verified Buyer Reviews
Customer Reviews
Share Your Experience
Write a Review
Thank you for your review!
Your submission has been received and will be published after verification.