3M 504 Respirator Cleaning Wipes — Alcohol-Free, 100/Box

What to check before you buy

Cartridge matched to the contaminant

A half mask is only as good as what is fitted to it. Particulate filters do nothing for vapors, and gas/vapor cartridges do nothing for particulates.

Assigned protection factor

A half mask carries an assigned protection factor of 10 under OSHA 1910.134. If the exposure exceeds ten times the occupational exposure limit, it is the wrong class of respirator.

Change-out schedule

OSHA requires a cartridge change schedule based on objective data. Waiting to smell or taste breakthrough is not acceptable for substances with poor warning properties.

Facepiece size

Half masks come in sizes and fit testing is done on the specific make, model and size. A different size is a different respirator.

How it compares to other half mask respirators we review

List prices recorded when this page was last updated; Amazon pricing moves frequently, so check the live listing. Browse the full half mask respirators range.

Frequently asked questions

What protection factor does a half mask provide?

OSHA assigns half mask air-purifying respirators an assigned protection factor of 10, meaning they are suitable up to ten times the occupational exposure limit when properly fitted.

How do I know when to change cartridges?

Use a change-out schedule based on objective data - manufacturer software, published breakthrough data or workplace monitoring. Odor and taste are unreliable and unacceptable as the sole trigger.

Can I use the same cartridge for dust and fumes?

Only if it is rated for both. Particulate filters capture solids and aerosols; gas and vapor cartridges use sorbent chemistry. Combination cartridges do both, and are marked accordingly.

Does OSHA require fit testing?

For tight-fitting respirators used under a required respiratory protection program, 1910.134 requires a medical evaluation first, fit testing before initial use, and fit testing at least annually thereafter.

Can I wear a respirator with facial hair?

Not a tight-fitting one. Hair crossing the sealing surface prevents a seal and the respirator will not deliver its rated protection. Loose-fitting PAPRs are the usual alternative.

What is a user seal check?

A quick positive and negative pressure check performed every time the respirator is donned. It confirms the respirator is seated - it does not replace fit testing.

Where do the specifications on this page come from?

They are taken from the manufacturer's published listing. WC Safety does not laboratory-test products, and nothing is claimed here that the manufacturer does not state.

Does WC Safety sell this product?

No. WC Safety is an independent review site and an Amazon Associate. Purchases happen on Amazon, and we earn a commission on qualifying purchases at no extra cost to you.