Moldex 7407 Ammonia Methylamine Respirator Cartridge

Moldex 7407 Overview

The Moldex 7407 is a single-unit ammonia/methylamine chemical cartridge that mounts on Moldex 7000, 7800, and 9000 series respirators to provide NIOSH-approved protection against alkaline gas hazards. Sold individually at $4.00, it is the single-cartridge version of the Moldex 7400 pair ($33.58), letting you replace one cartridge at a time rather than purchasing a full pair — a practical advantage for facilities running asymmetric wear schedules or needing a spare on hand without committing to pair pricing.

The cartridge uses an acid-impregnated adsorbent that chemically neutralizes basic (alkaline) molecules, making it effective against ammonia and methylamine vapors. It attaches via Moldex's bayonet twist-lock system and is interchangeable across the full Moldex cartridge platform.

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Where the Moldex 7407 Fits in Respirator Selection

Ammonia and methylamine fall into a distinct chemical class — alkaline gases — that require a chemically impregnated adsorbent rather than the activated carbon used in standard organic vapor cartridges like the 7100. If your hazard assessment identifies ammonia at concentrations above the OSHA PEL (50 ppm) but below the IDLH (300 ppm), a half-mask or full-face respirator fitted with the 7407 is the correct air-purifying respirator (APR) choice.

Understanding filter classes before you purchase helps prevent mismatched protection. The P95 vs R95 vs P100 filter class guide explains particulate ratings, which matter if you need the 7467 combo (AM+P100) for dust-plus-gas environments. For workers unsure whether ammonia exposure requires a rated cartridge or just nuisance relief, the nuisance relief vs rated respirator protection guide clarifies when NIOSH approval is legally required. Buyers evaluating the full Moldex lineup against competing brands should also check the best 3M respirator cartridges guide for a side-by-side look at alternative platforms.

The 7407 occupies the entry-level single-cartridge slot: it handles ammonia/methylamine only, with no ESLI. Facilities that also deal with organic vapors, acid gases, or multi-gas environments should move up to the Moldex 7600 Multi-Gas Smart pair, which adds End-of-Service-Life Indicator (ESLI) technology.

Who Should Buy the Moldex 7407?

What Does the Moldex 7407 Protect Against?

What the Moldex 7407 Does NOT Protect Against

The 7407 is a single-purpose ammonia/methylamine cartridge. It provides no protection against the following hazards:

• Organic vapors (solvents, paints, fuels) — use the Moldex 7107 OV single or 7100 OV pair
• Acid gases (chlorine, hydrogen chloride, sulfur dioxide) — use the Moldex 7200 acid gas pair
• Combined OV + acid gas hazards — use the Moldex 7307 OV+AG single
• Particulates (dust, mist, fumes, welding smoke) — no filter element; pair with the Moldex 7467 AM+P100 combo for combined protection
• Carbon monoxide or other gases — outside the cartridge's chemical class entirely
• Mercury vapor — requires a specialized mercury cartridge

Best Applications for the Moldex 7407

Agricultural and Livestock Facilities

Ammonia concentrations in confined livestock housing — poultry barns, hog confinement, dairy operations — routinely exceed the OSHA PEL of 50 ppm during manure agitation, cleaning, or warm weather. The 7407 mounted on a Moldex 7000 series half-mask ($24.19) provides practical, cost-effective protection for these short-duration high-exposure tasks. Change cartridges per your written change schedule — ammonia breakthrough is detectable by odor at low concentrations, but relying on smell alone is not an OSHA-compliant change criterion.

Refrigeration and HVAC Maintenance

Industrial refrigeration systems using anhydrous ammonia as a refrigerant create acute exposure risk during valve maintenance, leak response, and system purging. Technicians working on ammonia refrigeration systems who need a spare single cartridge rather than a full pair will find the 7407's individual pricing practical for stocking a maintenance kit.

Wastewater Treatment Operations

Wastewater treatment plants generate ammonia during biological treatment processes, particularly in aeration basins and sludge handling areas. Operators performing routine maintenance, sampling, or equipment inspection in areas with measured ammonia above 50 ppm should select the 7407 for their Moldex platform respirator. Pair with the Moldex 7740 P100 particulate filter in a combination mount if bioaerosols are also a concern — though verify Moldex's combination mount compatibility for your specific respirator model before ordering.

Chemical Manufacturing and Pharmaceutical Processing

Methylamine is the cartridge's second listed protection and is produced or used in pharmaceutical synthesis, tanning agents, dye manufacturing, and specialty chemical production. Facilities handling methylamine typically require a full respiratory protection program with IH-determined change schedules. The 7407 fits this compliance structure when ammonia or methylamine is the sole vapor hazard; mixed-chemical environments should evaluate the Moldex 7607 Multi-Gas Smart single instead.

Industrial Cleaning and Janitorial Services

High-concentration ammonia cleaning products used in industrial kitchens, food processing facilities, and cold storage units can generate vapor levels requiring respiratory protection. The 7407 at $4.00 per cartridge provides an affordable single-use solution for workers who need protection for a single cleaning shift without carrying full pair inventory.

Moldex 7407 Pros and Cons

Compatible Moldex Respirators

The Moldex 7407 uses Moldex's standard bayonet twist-lock interface and is compatible with the following Moldex respirator series:

The Moldex 7407 does NOT fit any non-Moldex respirator. Attempting to mount it on a 3M, Honeywell North, or other brand's facepiece will result in an improper seal or physical incompatibility. Browse the Moldex half-mask respirator collection or Moldex full-face respirator collection if you need a compatible facepiece.

Moldex 7407 vs Other Moldex Cartridges

Moldex 7407 vs Moldex 7467: When You Need More Than Ammonia Protection

Moldex 7407 vs Moldex 7400: Single vs Pair

Moldex 7407 Quick Answers

What respirators does the Moldex 7407 fit?

The Moldex 7407 fits the Moldex 7000 series half-mask, Moldex 7800 series half-mask, and Moldex 9000 series full-face respirator. It uses Moldex's proprietary bayonet twist-lock interface and does not fit any non-Moldex respirator brand.

How many cartridges come in one Moldex 7407 order?

One Moldex 7407 order contains one cartridge (1 per bag). This is a single-cartridge SKU — not a pair. Order two units to replace both cartridges on a half-mask respirator.

Does the Moldex 7407 have an ESLI?

No. The Moldex 7407 does not include an End-of-Service-Life Indicator (ESLI). Users must follow a written cartridge change schedule as required by OSHA 29 CFR 1910.134(d)(3)(iii). Facilities that need ESLI capability should evaluate the Moldex 7607 Multi-Gas Smart single.

Is the Moldex 7407 NIOSH approved?

Yes. The Moldex 7407 is NIOSH-approved for protection against ammonia and methylamine vapors. It is compliant for use in OSHA-regulated respiratory protection programs under 29 CFR 1910.134.

What is the difference between the Moldex 7407 and 7467?

The Moldex 7467 adds a P100 particulate filter to the same ammonia/methylamine protection. The 7407 covers only ammonia and methylamine vapors with no particulate protection. Choose the 7467 if your environment contains both ammonia vapors and airborne particulates (dust, fumes, mists).

Can I use the Moldex 7407 for organic vapors?

No. The Moldex 7407 uses an acid-impregnated adsorbent designed specifically for alkaline gases like ammonia and methylamine. It provides no protection against organic vapors (solvents, paints, fuels). Use the Moldex 7107 OV single for organic vapor hazards.

What is the price of the Moldex 7407?

The Moldex 7407 is priced at $4.00 per single cartridge on WC Safety. This is the lowest per-unit price point for NIOSH-approved ammonia protection on the Moldex platform. The paired version, the 7400, is sold as a two-cartridge set.

Moldex 7407 Specifications

Helpful Buying Guides

• P95 vs R95 vs P100 Filter Class Guide — understand particulate filter ratings before combining a cartridge with a filter element
• Respirator Cartridge ESLI Guide — learn when an End-of-Service-Life Indicator is required and how written change schedules work under OSHA 29 CFR 1910.134
• Nuisance Relief vs Rated Respirator Protection — determine whether your ammonia exposure level requires a NIOSH-approved cartridge or qualifies as nuisance-level only
• Best 3M Respirator Cartridges — compare Moldex 7407 alternatives on the 3M platform if you operate a mixed-brand fleet
• 3M vs Honeywell North Respirator Cartridges — brand comparison guide for buyers evaluating multi-platform respirator programs
• Best Respirator Cartridge for Mercury Vapor — if your site handles both mercury and ammonia, understand which cartridge serves each hazard

Moldex 7407 Frequently Asked Questions

Is the Moldex 7407 sold as a single cartridge or a pair?

The Moldex 7407 is sold as a single cartridge — one cartridge per bag. This distinguishes it from the Moldex 7400, which is sold as a two-cartridge pair. If you need to replace both cartridges on a half-mask respirator, add two units of the 7407 to your cart, or purchase the 7400 pair.

Which Moldex respirator series accepts the 7407 cartridge?

The Moldex 7407 is compatible with the Moldex 7000 series half-mask, the Moldex 7800 series half-mask, and the Moldex 9000 series full-face respirator. All three platforms use Moldex's standard bayonet twist-lock mount. Shop the Moldex half-mask collection or Moldex full-face respirator collection to find a compatible facepiece.

Does the Moldex 7407 protect against chlorine or acid gases?

No. The Moldex 7407 targets alkaline gases only (ammonia and methylamine). Chlorine and acid gases require an acid gas cartridge such as the Moldex 7200 acid gas pair. Attempting to use the 7407 for chlorine or acid gas exposure will not provide rated protection.

Do I need an ESLI if I use the Moldex 7407?

The 7407 does not include an ESLI. Without an ESLI, OSHA 29 CFR 1910.134 requires your respiratory protection program to include a written cartridge change schedule established by an industrial hygienist or equivalent qualified person, based on objective information about the contaminant concentration and cartridge service life. Review the ESLI guide for program compliance details.

Can the Moldex 7407 be used in a full-face respirator for ammonia?

Yes. The Moldex 7407 is compatible with the Moldex 9000 series full-face respirator ($226.90). A full-face respirator adds eye and face protection in addition to respiratory protection — recommended at higher ammonia concentrations where mucous membrane and eye irritation is a concern.

What is the shelf life of the Moldex 7407 before opening?

Moldex recommends storing cartridges in the original sealed packaging in a cool, dry location away from contaminants. Sealed cartridges have a manufacturer-specified shelf life of five years from the date of manufacture. Once opened and exposed to ambient air or contaminants, the cartridge service life is governed by your written change schedule — not the shelf-life clock.

Is the Moldex 7407 approved for use under OSHA's respiratory protection standard?

Yes. The Moldex 7407 is NIOSH-approved, which is the approval required for use in OSHA-regulated respiratory protection programs under 29 CFR 1910.134. Your program must also include medical evaluation, fit testing, training, and a written change schedule per 1910.134(d)(3)(iii) since the 7407 does not have an ESLI.

How does the Moldex 7407's chemical mechanism work?

The 7407 uses an acid-impregnated adsorbent material. When ammonia (a basic alkaline gas) passes through the cartridge media, it chemically reacts with the acid impregnant and is neutralized before reaching the facepiece inlet. This acid-base neutralization is distinct from the physical adsorption used in activated carbon organic vapor cartridges, which is why the two cartridge types are not interchangeable.

Can I add a P100 filter to the Moldex 7407 for dust protection?

The Moldex 7407 is not designed as a combination cartridge-filter system and does not have a pre-filter adapter. For combined ammonia and particulate protection, purchase the Moldex 7467 AM+P100 combo ($14.80/set), which is engineered as an integrated two-stage assembly for this purpose.

What industries use the Moldex 7407 most frequently?

The Moldex 7407 sees consistent use in agriculture and livestock operations, wastewater treatment facilities, industrial refrigeration maintenance, food processing plants, pharmaceutical manufacturing, and industrial cleaning services — all environments where ammonia is a routine or episodic chemical hazard.

How does the Moldex 7407 compare to the 3M 6004 ammonia cartridge?

The Moldex 7407 and the 3M 6004 both provide NIOSH-approved ammonia/methylamine protection, but they are completely incompatible with each other's respirator platforms. The Moldex 7407 fits only Moldex 7000/7800/9000 respirators; the 3M 6004 fits only 3M 6000/7000 series respirators. The buying decision is driven by which respirator platform your facility standardizes on, not by the cartridge itself.

Where can I buy the Moldex 7407?

The Moldex 7407 is available at $4.00 per cartridge directly from WC Safety and also on Amazon (ASIN B0FVXR4TYM). Browse the full Moldex cartridge collection to compare all 15 Moldex cartridge SKUs in one place.