Moldex 7400 Respirator Cartridge — Ammonia And Methylamine (Traditional, Moldex 7000/9000)

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Read our hands-on Moldex 7400 review for field-tested buyer notes.

Moldex 7400 Respirator Cartridge Overview

The Moldex 7400 is a NIOSH-approved ammonia and methylamine cartridge for the Moldex bayonet system. It adsorbs ammonia and methylamine and carries a green (ammonia) band, using the traditional Moldex cartridge design. Start with our guide to choosing a respirator cartridge, confirm the band on the respirator cartridge color chart, and see the Moldex cartridge upgrade guide.

The Moldex 7400 cartridge belongs to the Moldex respirator cartridges and filters range and fits Moldex 7000 and 7800 series half-mask respirators and 9000 series full-face respirators. It is a gas cartridge only — for dust, add a 7740 P100 filter or use the 7467.

Where the Moldex 7400 Fits in Cartridge Selection

Confirm the hazard before the cartridge. The Moldex 7400 handles ammonia and methylamine gas, not particulate. If you also face dust or mist, our organic vapor vs P100 guide and filter types explained cover when to move to a combination cartridge.

Traditional vs Semi-Rectangular

Moldex makes this protection in two shapes. The traditional 7400 is the traditional cartridge; the semi-rectangular 7407 adds surface area for easier breathing. Both carry the same NIOSH approval; see the Moldex 7000 series guide.

Who Should Buy the Moldex 7400?

Buy it if your exposure is ammonia and methylamine on a Moldex 7000/7800/9000 facepiece. Choose another cartridge if your hazard differs: for ammonia and methylamine plus dust use the 7467, and for a broader gas mix see the Moldex 7607 multi-gas SMART cartridge.

What Does the Moldex 7400 Protect Against?

What the Moldex 7400 Does NOT Protect Against

The Moldex 7400 does not capture particulate or organic vapor, acid gas or particulate. For dust, add a 7740 P100 filter; for a different gas, match the Moldex cartridge to the hazard.

No air-purifying cartridge makes a dangerous atmosphere safe. Never use the Moldex 7400 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

Refrigeration & fertilizer

Anhydrous-ammonia and fertilizer work on Moldex respirators.

Treatment & cleaning

Ammonia tasks; for dust add a 7740 P100 filter or use the 7467.

Pros & Cons

Moldex 7400 vs Other Moldex Cartridges

Moldex 7400 vs the Alternatives

How it compares to the closest Moldex options:

• 7400 vs 7407: same ammonia protection; the 7407 is the semi-rectangular design with lower breathing resistance.
• 7400 vs 7467: the 7467 adds a built-in P100 filter for dust.
• 7400 vs 7600: the 7600 multi-gas SMART covers ammonia within a broader mix.

Moldex 7400 Quick Answers

Does the Moldex 7400 filter dust?

No — it is gas-only; add a 7740 P100 filter for particulate.

Does the Moldex 7400 fit Moldex 7000 and 9000 respirators?

Yes — it fits the 7000 series half-mask and 9000 series full-face (and 7800 series).

Is the Moldex 7400 reusable?

The cartridge is used until its service life is reached; the respirator is reusable across many cartridge changes.

Moldex 7400 Specifications

Compatible Moldex Respirators

The Moldex 7400 uses the Moldex bayonet connection, so it mounts on the Moldex 7000 series half-mask (and 7800 series) and the Moldex 9000 series full-face respirators. It does not fit 3M, Honeywell North or MSA facepieces.

Helpful Buying Guides

• Moldex 7000 vs 3M 6000 series
• How to choose a respirator cartridge
• Moldex 7100 vs 7300 vs 7600 upgrade guide
• organic vapor vs P100
• respirator cartridge color chart
• respirator filter types explained

Moldex 7400 Frequently Asked Questions

What does the Moldex 7400 protect against?

The 7400 is a ammonia and methylamine cartridge. It adsorbs ammonia and methylamine. It is gas-only and does not filter particulate; it does not protect against organic vapor, acid gas or particulate.

Does the Moldex 7400 filter dust?

No. It is a gas cartridge. For dust or mist, pair it with a Moldex 7740 P100 filter, or use the 7467 combination cartridge.

Which respirators does the Moldex 7400 fit?

It uses the Moldex bayonet connection and fits Moldex 7000 and 7800 series half-mask respirators and 9000 series full-face respirators. It does not fit 3M, Honeywell North or MSA facepieces.

Is the Moldex 7400 the semi-rectangular design?

No — the 7400 is the traditional design; the 7407 is the semi-rectangular version with lower breathing resistance.

What color band is the Moldex 7400?

The 7400 carries a green (ammonia) band; confirm it on the cartridge color chart before use.

Is the Moldex 7400 NIOSH-approved?

Yes. The 7400 is NIOSH-approved under 42 CFR Part 84 for ammonia and methylamine. Verify any cartridge against the NIOSH Certified Equipment List.

How often should I replace the Moldex 7400?

Replace it on a documented change-out schedule, at odor or taste breakthrough, or when it is damaged.

How is the Moldex 7400 sold?

This listing is a pair (2 cartridges). Use Request a Quote for case pricing on volume orders.

Can I add particulate protection to the Moldex 7400?

Yes — add a 7740 P100 filter, or choose the 7467 which builds P100 in.

Is this the genuine Moldex 7400 cartridge?

Yes. WC Safety sells authentic, NIOSH-approved Moldex 7400 cartridges through legitimate supply channels.

What is the difference between the 7400 and a multi-gas cartridge?

A single-class cartridge is tuned to its listed gases; the multi-gas 7600/7607 cover a broader mix and add a SMART end-of-service-life indicator.

How should I store the Moldex 7400?

Store it sealed in its original packaging, away from gases and dust, so the sorbent is not used up before you wear it.