Moldex 7200 Acid Gas Respirator Cartridge

Moldex 7200 Overview

The Moldex 7200 is a NIOSH-approved acid gas respirator cartridge, sold as a pair, that attaches via bayonet connection to Moldex 7000 series half-mask respirators, Moldex 8000 and other half-mask platforms, and Moldex 9000 series full-face respirators. It uses a chemically-treated activated carbon bed specifically engineered for acid gas breakthrough resistance, protecting against hydrogen chloride, chlorine, hydrogen fluoride, sulfur dioxide, and hydrogen sulfide at concentrations up to 10× the OSHA permissible exposure limit. At $36.23 per pair, the 7200's higher price relative to the OV family reflects a denser sorbent loading tuned for acid gas molecules rather than organic vapors — this is not a multi-purpose cartridge, and that precision is the point.

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Where the Moldex 7200 Fits in Respirator Selection

Respirator cartridge selection starts with hazard identification, not brand preference. Before ordering the 7200, your SDS or industrial hygienist report needs to confirm that acid gases are the primary or sole chemical hazard in your work area. If the hazard list also includes organic solvents, paint fumes, or other vapors, the 7200 will leave you unprotected — the correct choice is the Moldex 7300 OV+AG cartridge or the Moldex 7367 OV+AG+P100 combo for environments that also have airborne particulates.

The 7200 occupies the dedicated acid gas slot in the Moldex cartridge lineup. It provides no organic vapor protection whatsoever — its carbon bed is chemically-treated specifically for acid gas adsorption, which is why it outperforms general-purpose combination cartridges in pure acid gas scenarios. For workers comparing cartridge classes, our P95 vs R95 vs P100 filter class guide explains how filter ratings interact with cartridge protection levels, and our ESLI guide covers how to manage change schedules on cartridges without end-of-service-life indicators like this one. Buyers evaluating whether a nuisance-relief cartridge is sufficient for their acid gas exposure should read our nuisance relief vs. rated protection explainer before purchasing.

If your facility uses 3M respirators and you are evaluating cross-brand options, our best 3M respirator cartridges guide and the 3M vs. Honeywell North cartridge comparison provide context — though cartridges are brand-locked and the 7200 fits Moldex respirators only.

Who Should Buy the Moldex 7200?

What Does the Moldex 7200 Protect Against?

The 7200 is NIOSH-approved for acid gas service. The table below maps each covered hazard to its protection level and buyer guidance:

What the Moldex 7200 Does NOT Protect Against

The 7200 acid gas cartridge provides zero protection against the following hazard categories:

• Organic vapors — solvents, paint fumes, gasoline vapors, acetone, toluene, xylene, and similar chemicals require an OV-rated cartridge such as the Moldex 7100 or, for combined OV+AG hazards, the Moldex 7300
• Ammonia and methylamine — these alkaline gases require the Moldex 7400 AM cartridge
• Airborne particulates — dusts, mists, metal fumes, and aerosols require a P100 filter; the 7367 combo cartridge combines OV+AG+P100 in one unit if particulates are also present
• Carbon monoxide and other gases not in the acid gas class — multi-gas environments require the Moldex 7600 Multi-Gas Smart cartridge
• Mercury vapor — requires a specialized mercury vapor cartridge; see our best cartridge for mercury vapor guide

Best Applications for the Moldex 7200

Chemical Manufacturing and Processing

Facilities producing or handling chlorine compounds, sulfuric acid, hydrochloric acid, or hydrofluoric acid are the 7200's home environment. Workers at reaction vessels, transfer stations, or acid storage areas where HCl or Cl₂ are the documented airborne hazards benefit from the 7200's dedicated sorbent bed. Pair with the appropriate Moldex half-mask respirator and verify concentrations are within cartridge service capacity before entry.

Pulp and Paper / Water Treatment

Bleaching operations in pulp mills release chlorine and chlorine dioxide; water treatment facilities use chlorine gas for disinfection. The 7200 is a standard-issue cartridge in both industries for routine maintenance and monitoring tasks where chlorine gas exposure is the primary concern. Confirm your industrial hygienist's air sampling data before selecting cartridge change intervals, as chlorine concentrations can vary significantly during process upsets.

Semiconductor Fabrication and Electronics

Wet etch processes and cleaning operations in semiconductor fabs frequently involve HF, HCl, and HNO₃ vapors. The 7200 is appropriate for routine fab maintenance tasks at non-IDLH HF concentrations. Given HF's severe systemic toxicity, facilities should cross-reference ACGIH TLV data and confirm SCBA requirements for higher-concentration scenarios before relying on air-purifying cartridges.

Electroplating and Metal Finishing

Acid pickling, anodizing, and electroplating baths release HCl, H₂SO₄ mist, and other acid vapors. The 7200 handles the acid gas component; add a Moldex 7740 P100 filter if mist or fume particulates are also present. The full Moldex cartridge and filter collection has compatible components for combined hazard configurations.

Laboratory and Research Environments

Labs handling strong acids, conducting acid digestions, or working with chlorinated solvents use the 7200 for short-duration tasks outside the fume hood. Institutional safety officers should confirm that air-purifying cartridges are permissible under their lab safety program and that concentrations remain well below IDLH thresholds for each acid gas present.

Pros and Cons

Compatible Moldex Respirators

The Moldex 7200 uses Moldex's standard bayonet/threaded connection system and is compatible with the following Moldex respirator series:

The Moldex 7200 does NOT fit any non-Moldex respirator. Attempting to force-fit incompatible cartridges voids NIOSH approval and eliminates the facepiece seal — never mix cartridge and respirator brands.

Moldex 7200 vs. Other Moldex Cartridges

Every Moldex cartridge in the 7-series uses the same bayonet connection. The differences are in the sorbent chemistry and hazard coverage. Choose based on your SDS hazard assessment:

Moldex 7200 vs. Moldex 7300: Which Acid Gas Cartridge Do You Need?

This is the most common comparison question on the 7200. Both cartridges protect against acid gases — but the 7300 also covers organic vapors, and it costs less ($18.73 vs. $36.23 per pair).

Buy verdict: If your SDS lists only acid gases with no organic vapor co-hazard, the 7200's dedicated sorbent bed is the technically correct choice and its higher price reflects longer acid gas service capacity per cartridge. If there is any possibility of organic vapor exposure — even occasional — choose the Moldex 7300 at the lower price point. When in doubt, the 7300 is the safer default for facilities without a formal industrial hygiene program.

Moldex 7200 Quick Answers

What respirators does the Moldex 7200 fit?

The Moldex 7200 fits all Moldex 7000, 8000, and 9000 series respirators using the standard Moldex bayonet connection. It does not fit any 3M, Honeywell North, MSA, or other brand respirator — Moldex's bayonet fitting is proprietary.

Does the Moldex 7200 protect against organic vapors?

No. The Moldex 7200 is an acid gas-only cartridge with no organic vapor protection. Workers exposed to solvents, paint fumes, or other organic vapors must use the Moldex 7100 OV cartridge or the Moldex 7300 OV+AG combination cartridge.

Does the Moldex 7200 have an ESLI?

No. The Moldex 7200 does not include an end-of-service-life indicator. Change schedules must be established through an employer-maintained respiratory protection program per OSHA 29 CFR 1910.134, based on industrial hygiene data, manufacturer service-life information, or odor breakthrough detection. The Moldex Smart ESLI cartridges (7600/7607 series) offer indicator-based change notification for multi-gas environments.

How many cartridges come in a Moldex 7200 package?

Each package contains two cartridges (one pair). Both cartridges should be replaced simultaneously at each change interval to maintain balanced airflow resistance across the respirator.

Is the Moldex 7200 NIOSH approved?

Yes. The Moldex 7200 is NIOSH-approved for acid gas service. NIOSH color-coding for acid gas cartridges is green, which the 7200 carries for compliance identification during workplace respiratory protection audits.

Why is the Moldex 7200 more expensive than the 7300?

The Moldex 7200's higher price reflects a dedicated acid gas sorbent bed with greater sorbent density than the dual-purpose 7300. In a pure acid gas environment, the 7200 provides longer service life per cartridge because the entire sorbent capacity is allocated to acid gas adsorption rather than being shared with an organic vapor layer.

Can the Moldex 7200 be used for hydrogen fluoride?

Yes, the Moldex 7200 is rated for hydrogen fluoride (HF) as an acid gas cartridge. Given HF's systemic toxicity and low IDLH threshold (30 ppm), confirm that workplace concentrations are within the cartridge's service range and that air-purifying respirators are permissible under your facility's safety plan before use.

Moldex 7200 Specifications

Helpful Buying Guides

• P95 vs. R95 vs. P100 — Understanding Filter Classes for Respirator Cartridges
• Respirator Cartridge ESLI Guide — When to Change Your Cartridge
• Nuisance Relief vs. Rated Cartridge Protection — What the Difference Means for Your Safety
• Best 3M Respirator Cartridges — Cross-Brand Comparison Guide
• 3M vs. Honeywell North Respirator Cartridges — Full Comparison
• Best Respirator Cartridge for Mercury Vapor

Moldex 7200 Frequently Asked Questions

Is there a single-cartridge version of the Moldex 7200?

WC Safety does not currently carry a single-cartridge acid gas-only SKU in the Moldex line. The 7200 is sold as a pair only. If cost per cartridge is a priority, note that the Moldex 7307 is available as a single cartridge with OV+AG coverage at $8.80 — though it adds organic vapor protection you may not need.

How often should I replace the Moldex 7200?

The Moldex 7200 has no ESLI. Replacement frequency must be determined by your employer's respiratory protection program per OSHA 29 CFR 1910.134(d)(3)(iii)(B)(2), factoring in gas concentration, temperature, humidity, workload, and cartridge exposure time. Replace immediately upon detecting odor, increased breathing resistance, or any sign of physical damage to the cartridge body.

Can the Moldex 7200 be used with the Moldex 9000 full-face respirator for HF work?

Yes, the 7200 is physically and chemically compatible with the Moldex 9000 series full-face respirator. Full-face use is strongly recommended for hydrofluoric acid work because HF vapor causes severe eye and mucous membrane irritation. Confirm concentration levels are within the respirator's assigned protection factor and below HF IDLH before using an air-purifying system.

Does the Moldex 7200 protect against chlorine dioxide?

Chlorine dioxide (ClO₂) is a distinct compound from chlorine (Cl₂). The 7200 is NIOSH-approved for chlorine (Cl₂) as an acid gas, but ClO₂ requires verification against the specific NIOSH approval test conditions. Consult Moldex technical documentation or your industrial hygienist before using the 7200 in confirmed chlorine dioxide atmospheres.

What is the difference between the Moldex 7200 and Moldex 7600 cartridges?

The Moldex 7600 covers a broader multi-gas hazard profile and includes Moldex's Smart ESLI end-of-service-life indicator. The 7200 covers acid gases only with no ESLI, but its dedicated acid gas sorbent bed provides a deeper capacity for acid gas molecules specifically. Choose the 7600 for multi-gas environments or when a change indicator is required by your safety program.

Can I add a P100 filter to the Moldex 7200 for combined acid gas and particulate protection?

The Moldex 7740 P100 filter can be mounted over the 7200 cartridge on compatible Moldex respirators to provide concurrent particulate protection. Alternatively, the Moldex 7367 OV+AG+P100 combo integrates all three in a single unit, though it adds OV coverage you may not require.

Is the Moldex 7200 appropriate for pool chemical handling?

Pool chemical work involving chlorine gas, sodium hypochlorite off-gassing, or muriatic acid (HCl) falls squarely within the 7200's protection profile. The cartridge is rated for both chlorine and hydrogen chloride. Verify that ambient concentrations are confirmed below IDLH and that oxygen levels are adequate before using an air-purifying respirator in enclosed pool mechanical rooms.

How do I know the Moldex 7200 is properly seated on my respirator?

After inserting the 7200 into the bayonet fitting, rotate clockwise until the cartridge clicks and locks. Perform a negative-pressure user seal check: place your palms over both cartridges, inhale gently, and hold for 10 seconds. The facepiece should collapse slightly and hold without air leaking in. A failed seal check requires refitting or replacing the respirator — do not enter the work area with a failed seal.

Can the Moldex 7200 cartridge be stored for future use after opening?

Opened and partially used acid gas cartridges should not be stored for extended periods because the activated carbon continues to adsorb airborne contaminants even when not in active use. Store opened cartridges in a sealed plastic bag away from chemical storage areas and heat sources. Follow your employer's written change-schedule policy for maximum storage time between uses.

Does buying a pair mean both cartridges are identical?

Yes. Each package contains two identical Moldex 7200 acid gas cartridges intended for simultaneous use on both sides of the respirator facepiece. They should always be changed together — replacing only one cartridge creates unequal resistance across the two inhalation ports and may reduce protection on the older side.

What OSHA regulation governs use of the Moldex 7200?

The Moldex 7200 is used under OSHA's Respiratory Protection Standard, 29 CFR 1910.134. Employers must maintain a written respiratory protection program including hazard assessment, medical evaluation, fit testing, training, and a cartridge change schedule before requiring or permitting employees to use air-purifying cartridge respirators.

Is the Moldex 7200 available in a multi-pack for high-volume facilities?

WC Safety sells the Moldex 7200 in the standard pair format. For high-volume purchases or B2B procurement of cartridges across multiple work areas, contact WC Safety directly. The full Moldex cartridge collection is available for bulk review online.