Best Honeywell North Cartridge for Chlorine (2026)
Best Honeywell North Cartridge for Chlorine
Reviewed by WC Safety Editorial Team — Last updated: June 2026.
Quick Answer
Chlorine is an acid gas, so the Honeywell North answer is an acid-gas or multi-contaminant cartridge, never a P100 filter or an organic-vapor cartridge. And because chlorine is acutely toxic, the concentration limit matters as much as the cartridge.
| User | Best North Cartridge | Why |
|---|---|---|
| Most users (chlorine + mist) | 7582P100L (acid gas + P100) | Chlorine coverage plus particulate filter |
| Chlorine gas only | N75002L (acid gas) | Focused, lower-cost acid-gas cartridge |
| Water treatment / mixed | 75SCP100L (multi + P100) | Chlorine plus related gases and particulate |
| Leak / above 10 ppm / unknown | Supplied air or SCBA | No cartridge is rated above the IDLH |
For most chlorine work choose the 7582P100L (acid gas + P100); for pure chlorine gas the focused N75002L is enough. The non-negotiable rule: a cartridge is valid only below the 10 ppm chlorine IDLH. Full brand-neutral detail is in our best respirator cartridge for chlorine guide.
Understanding the Hazard: Chlorine Gas (Cl₂)
Chlorine is a greenish-yellow, pungent gas and a powerful oxidizer. For cartridge selection it is an acid gas, captured by acid-gas sorbent, which is why ordinary organic-vapor cartridges and P100 filters fail against it.
How exposure occurs. Chlorine gas is used to disinfect drinking water and wastewater, supplied from 150-pound cylinders or one-ton containers feeding a chlorinator. Pool operators handle chlorine-releasing chemicals that off-gas when wet or mixed. Chemical plants use chlorine as a feedstock. Leaks at cylinders, valves, and fittings are the defining exposure event.
Short-term risks. Low concentrations sting the eyes, nose, and throat; higher levels cause coughing, chest tightness, and airway burns; and high concentrations cause pulmonary edema and can be rapidly fatal. Long-term risks. Repeated exposure contributes to chronic bronchitis and reactive airway disease.
Why respiratory protection matters. Chlorine odor warns at low levels, but a leak escalates faster than a cartridge can safely handle. The numbers frame the program: OSHA PEL 1 ppm ceiling, NIOSH REL 0.5 ppm ceiling, IDLH 10 ppm. Common environments: water and wastewater plants, pool and aquatic facilities, and chlorine-using chemical manufacturing.
Which Honeywell North Cartridge Is Best for Chlorine?
Primary recommendation: the 7582P100L (acid gas + P100). For most chlorine work, including water treatment where mists are common, this is the right North cartridge — acid-gas sorbent for the chlorine plus a P100 filter for particulate.
Focused / budget: the N75002L (acid gas). When chlorine gas is the only hazard and no particulate is present, the dedicated acid-gas cartridge is the lighter, lower-cost correct choice.
Broad / water treatment: the 75SCP100L (multi-contaminant + P100). For plants facing chlorine plus chlorine dioxide, sulfur dioxide, and other gases, the multi-contaminant cartridge covers the whole disinfection family plus particulate in one unit.
Maximum protection: full-face, and supplied air for leaks. Pair any chlorine cartridge with a North 5400 or North 7600 full-face for eye protection. For cylinder changes, leak response, and unknown concentrations above the 10 ppm IDLH, use SCBA. Do not use the N75001L (organic vapor) or a plain 7580P100 (P100) for chlorine. When unsure, start with how to choose a respirator cartridge.
Honeywell North Cartridge Comparison Table for Chlorine
| Cartridge / Filter | Protection Type | P100 | Suitable for Chlorine? | Strengths | Limitations | Recommended Use |
|---|---|---|---|---|---|---|
| 7582P100L | Acid gas + P100 | Yes | Yes — ideal | Chlorine + particulate | Only below IDLH | Most chlorine work |
| N75002L | Acid gas | No | Yes (gas only) | Focused, low cost | No particulate | Pure chlorine gas |
| 75SCP100L | Multi-contaminant + P100 | Yes | Yes (broad) | Chlorine + related gases | Higher cost | Water treatment, mixed |
| 7583P100L | OV + AG + P100 | Yes | Yes | Adds organic vapor | Heavier, costlier | Chlorine + solvents |
| 75SCL | Multi-gas (no P100) | No | Yes (gas only) | Multi-gas, low profile | No particulate | Mixed gas, no mist |
| N75001L | Organic vapor | No | No | Solvent vapor | Wrong sorbent | Solvents — not chlorine |
| N75003L | Ammonia | No | No | Ammonia | Wrong sorbent | Ammonia — not chlorine |
| N75004L | Formaldehyde | No | No | Formaldehyde | Wrong sorbent | Labs — not chlorine |
| 7580P100 | P100 particulate | Yes | No | Dust capture | Zero gas protection | Dust — not chlorine |
| 7581P100L | OV + P100 | Yes | No | OV + dust | No acid-gas sorbent | Paint — not chlorine |
Best Honeywell North Cartridges for Chlorine — In Depth
Honeywell North 7582P100L (Acid Gas + P100)
Protection: acid-gas sorbent plus a 99.97% P100 filter. Ideal applications: water and wastewater treatment, chlorine handling where mist or particulate is present. Strengths: chlorine and acid-gas coverage with particulate in one cartridge. Weaknesses: valid only below the 10 ppm IDLH. Choose it when chlorine work involves any mist or dust. Do not choose it when the exposure could exceed the IDLH — use SCBA. Read the 7582P100L review.
Honeywell North N75002L (Acid Gas)
Protection: acid-gas sorbent, vapor only. Ideal applications: pure chlorine gas exposure with no particulate, below the IDLH. Strengths: focused, lightweight, economical. Weaknesses: no particulate filter. Choose it when chlorine gas is the only hazard. Do not choose it when mist or dust is present — step up to the 7582P100L. Read the N75002L review.
Honeywell North 75SCP100L (Multi-Contaminant + P100)
Protection: multi-contaminant gas sorbent (including chlorine and related acid gases) plus P100. Ideal applications: water-treatment plants and mixed disinfection-gas environments. Strengths: broadest single-cartridge coverage for the chlorine family. Weaknesses: higher cost than the focused 7582P100L. Choose it when several gases are present. Do not choose it when chlorine alone makes the 7582P100L sufficient. Read the 75SCP100L review.
Recommended Honeywell North Respirators for Chlorine
Chlorine attacks the eyes, so the respirator decision favors full-face. All North facepieces accept the chlorine cartridges via the shared bayonet.
| Respirator | Type / APF | Best Chlorine Use |
|---|---|---|
| North 5400 | Full face / APF 50 | Preferred — protects eyes, higher APF |
| North 7600 | Full face (silicone) / APF 50 | Water-treatment cylinder rooms, long shifts |
| North 7700 | Half mask / APF 10 | Brief low-level work with sealed goggles |
| North 5500 | Half mask / APF 10 | Economical low-level tasks with goggles |
For chlorine, default to a North 5400 or North 7600 full-face respirator, which protects the eyes and provides a protection factor of 50. A North 7700 or North 5500 half mask with the N75002L and sealed goggles can serve brief, low-level tasks. Compare full-face models in the North 5400 vs 7600 comparison and half masks in the North 5500 vs 7700 comparison, and browse all North full-face respirators and North half masks. For chlorine leaks and cylinder changes, none of these qualify — use SCBA, as detailed in the Honeywell North cartridge guide.
Common Cartridge Selection Mistakes for Chlorine
1. Using a P100 filter for chlorine gas. A P100 disc stops particles only. It provides zero protection against chlorine gas. Chlorine needs an acid-gas sorbent.
2. Using an organic-vapor cartridge. The N75001L is tuned for solvents, not the acid gas chlorine. It is the wrong sorbent.
3. Using a cartridge above the IDLH. Chlorine leaks blow past 10 ppm fast. Leaks, cylinder changes, and unknown concentrations demand SCBA, not the N75002L.
4. Choosing a half mask and ignoring the eyes. Chlorine stings the eyes at low levels. Full-face is the right default; half masks need tight goggles and only for brief low-level work.
5. Relying on odor as the change schedule. Chlorine smells sharp, but odor is not a compliant schedule. Use a written, data-based schedule under OSHA 1910.134, and replace at any breakthrough smell.
6. Mixing pool chemicals. Combining chlorine products with acids or ammonia cleaners generates chlorine or chloramine gas. Never mix pool chemicals, and ventilate before opening feeders.
When Should You Replace North Chlorine Cartridges?
Acid-gas cartridges saturate over time and must follow a written change schedule. Chlorine odor is a useful backstop — any breakthrough smell means replace immediately — but it is not a substitute for a data-based schedule.
| Condition | Replace When | Notes |
|---|---|---|
| Acid-gas cartridge (N75002L / 7582P100L) | Per change schedule; immediately at odor/irritation | Sharp odor warns of breakthrough — act on it |
| P100 layer (7582P100L / 75SCP100L) | When breathing resistance rises | Mechanical loading, separate from saturation |
| High humidity (water treatment) | Sooner than baseline | Moisture cuts sorbent capacity |
| High concentration / heavy use | Sooner than baseline | Sorbent saturates faster |
| Stored / unopened | By printed expiration date | Sorbent degrades over years even sealed |
Acid-gas cartridges are color-coded white. For the full methodology, see how long do respirator cartridges last and OSHA 29 CFR 1910.134; for the color code, see the respirator cartridge color chart. For sulfur dioxide, hydrogen chloride, and the rest of the acid-gas family, see our best respirator cartridge for acid gas guide.
Frequently Asked Questions
What Honeywell North cartridge is best for chlorine?
Chlorine is an acid gas, so the best Honeywell North cartridge is the N75002L (acid gas) or, when mist or particulate is present, the 7582P100L (acid gas + P100). For broad water-treatment coverage the 75SCP100L multi-contaminant cartridge also covers chlorine. Confirm the level is below the 10 ppm chlorine IDLH; above that, use supplied air or SCBA.
Does an organic-vapor or P100 cartridge protect against chlorine?
No. Chlorine is an acid gas. An organic-vapor cartridge (N75001L) is the wrong sorbent, and a P100 filter (7580P100, 75FFP100) stops particles only and does nothing against chlorine gas. You need the acid-gas N75002L, the acid-gas plus P100 7582P100L, or a multi-contaminant cartridge that lists chlorine.
What North cartridge do water treatment plants use for chlorine?
Water and wastewater plants commonly use the 7582P100L (acid gas + P100) or the 75SCP100L multi-contaminant cartridge, because they cover chlorine plus related disinfection gases and add particulate protection for mists. These are for routine work and escape below the IDLH only; chlorine cylinder changes and leaks require supplied air or SCBA.
What is the chlorine IDLH and why does it matter?
The chlorine IDLH (immediately dangerous to life or health) is 10 ppm. A cartridge respirator is only valid for known concentrations below the IDLH and within the respirator protection factor. A chlorine leak can exceed 10 ppm in seconds, so leaks, cylinder changes, and unknown concentrations require a supplied-air respirator or SCBA, never a cartridge.
Do I need a full-face respirator for chlorine?
Full-face is strongly preferred. Chlorine is a powerful eye and respiratory irritant, so a North 5400 or 7600 full-face protects the eyes and gives a protection factor of 50. A half mask with the N75002L plus sealed goggles can suit brief, low-level tasks, but full-face is the safer default for chlorine.
What is the difference between the N75002L and 7582P100L for chlorine?
Both are acid-gas cartridges that cover chlorine. The N75002L is acid gas only; the 7582P100L adds an integrated P100 filter for dust, mist, or fume. Use the N75002L for pure chlorine gas and the 7582P100L when particulate or acid mist is also present, as in many water-treatment areas.
Does the 75SCP100L cover chlorine?
Yes. The North 75SCP100L multi-contaminant cartridge covers chlorine along with other acid gases, organic vapor, and formaldehyde, and includes a P100 filter. It is a strong single-cartridge choice for water treatment and mixed environments, though the focused 7582P100L is lighter and lower cost when chlorine is the main concern.
How long does a North chlorine cartridge last?
Acid-gas cartridges saturate over time and must be replaced on a written change schedule under OSHA 1910.134(d)(3). Chlorine has a sharp odor that gives some warning, but warning properties are not a reliable change schedule. Replace immediately at any chlorine odor, taste, or irritation through the mask, and base the schedule on documented data.
Can a cartridge respirator be used for a chlorine leak?
No. Chlorine leaks rapidly exceed the 10 ppm IDLH. Above the IDLH, in oxygen-deficient air, or at unknown concentration, OSHA 1910.134 requires supplied air or SCBA. Acid-gas cartridges are only for known concentrations below the IDLH. Plan leak response around supplied air, not the N75002L.
Are Honeywell North chlorine cartridges NIOSH approved?
Yes. The N75002L (acid gas), 7582P100L (acid gas + P100), and 75SCP100L (multi-contaminant + P100) are NIOSH-approved under 42 CFR Part 84 for their respective acid-gas and particulate classes. Use them within their NIOSH approval and an OSHA 1910.134 program.
Can North chlorine cartridges fit a 3M respirator?
No. North cartridges fit only North facepieces via the North bayonet. They will not seal on a 3M, MSA, or Moldex respirator. The 3M acid-gas equivalents are the 6002 and 60922, but they are not interchangeable with North facepieces.
What size North respirator should I buy for chlorine?
North respirators come in small, medium, and large; most adults fit medium, but only a fit test under OSHA 1910.134(f) confirms it. Because chlorine is a strong irritant, a confirmed seal and a clean-shaven sealing surface are critical, and full-face is generally preferred for eye protection.
Where is chlorine exposure most common?
Drinking-water and wastewater disinfection, swimming-pool chemical handling, chemical manufacturing, bleaching operations, and any process using chlorine gas cylinders. Pool chemical mixing and water-treatment cylinder rooms are the classic exposure scenarios, and both demand careful concentration control.
What North cartridge do I use for pool chlorine?
Handling pool chemicals or responding to off-gassing calls for an acid-gas cartridge such as the N75002L, or the 7582P100L when mist is present, ideally on a full-face respirator since chlorine stings the eyes. Heavy off-gassing in an enclosed pump room is a supplied-air situation, not a cartridge task. Never mix pool chemicals.
Can North chlorine cartridges be reused?
An acid-gas cartridge can be reused across its change schedule if resealed airtight between uses, but the sorbent keeps aging once opened. Any chlorine odor through the mask means breakthrough — replace it. Never share cartridges between workers.
What color is a chlorine cartridge?
Acid-gas cartridges, which cover chlorine, are color-coded white under ANSI/ISEA 110. With a P100 filter added, a magenta band appears too. Multi-contaminant cartridges carry several bands. See our respirator cartridge color chart for the full code.
Is chlorine an acid gas?
Yes. For respirator-cartridge selection, chlorine is classified as an acid gas, which is why acid-gas and multi-contaminant cartridges are the correct choice. Organic-vapor-only cartridges and P100 filters do not protect against it.
How do I know when my chlorine cartridge is bad?
Replace immediately if you detect chlorine odor, taste, or eye or throat irritation through the mask, which signals breakthrough. Also replace per your written change schedule, when breathing resistance rises on a P100 combination, or if the cartridge is wet, damaged, or expired.
Can one North cartridge cover chlorine and other acid gases?
Yes. The N75002L and 7582P100L acid-gas cartridges cover chlorine along with hydrogen chloride, sulfur dioxide, and other acid gases, and the 75SCP100L extends coverage further. Verify each specific gas appears on the NIOSH approval, and remember no cartridge is valid above any contaminant IDLH.
Is a half mask enough for chlorine, or do I need full-face?
A half mask with an acid-gas cartridge plus sealed goggles can suit brief, low-level chlorine tasks, but full-face is preferred because chlorine irritates the eyes and full-face provides a higher protection factor of 50. Above the 10 ppm IDLH, use supplied air or SCBA regardless of facepiece.
Where can I learn more about chlorine cartridge selection?
See our complete Honeywell North cartridge guide for the full selection chart, our brand-neutral best respirator cartridge for chlorine guide for water-treatment and pool detail, and our best respirator cartridge for acid gas guide for the broader acid-gas family.
More Honeywell North Cartridge Resources
- Honeywell North Cartridge Guide — the full pillar: every model, chart, and replacement schedule
- Best Honeywell North Filters & Cartridges — overview and lineup
- Best Respirator Cartridge for Chlorine — brand-neutral water-treatment and pool detail
- Best Respirator Cartridge for Acid Gas • Best Respirator Cartridge for Ammonia
- How to Choose a Respirator Cartridge • Organic Vapor vs P100
- Shop Honeywell North cartridges • North full-face respirators
Disclosures & editorial standards
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links on this page are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Respiratory protection must be based on a documented workplace hazard assessment and fit testing under OSHA 29 CFR 1910.134. Above a contaminant's IDLH, only supplied-air or SCBA is acceptable. Consult a Certified Industrial Hygienist (CIH) for site-specific guidance.
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links on this page are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Respiratory protection must be based on a documented workplace hazard assessment and fit testing under OSHA 29 CFR 1910.134. Above a contaminant's IDLH, only supplied-air or SCBA is acceptable. Consult a Certified Industrial Hygienist (CIH) for site-specific guidance.