Respirators for Ammonia and Methylamine

The exposure limits

What the federal rule says

Each entry is condensed from the paragraph cited; the paragraph itself is the rule and the link opens it.

29 CFR 1910.134(d)(3)(iii)(B): For gases and vapors: an atmosphere-supplying respirator, or an air-purifying respirator with a NIOSH-certified ESLI for the contaminant, or a cartridge change schedule based on objective data.

29 CFR 1910.134(d)(2): IDLH atmospheres require a pressure-demand SCBA or a combination pressure-demand supplied-air respirator with auxiliary self-contained air supply.

Source: 29 CFR, Occupational Safety and Health Standards, as published by OSHA (ecfr.gov / osha.gov), read Nov 2–3 2026.

California (Cal/OSHA)

Each entry is condensed from the paragraph cited; the paragraph itself is the rule and the link opens it.

Title 8 §5144(d): The same selection rules apply under Cal/OSHA.

Source: California Code of Regulations, Title 8, as published by Cal/OSHA (dir.ca.gov), read Nov 2–3 2026.

What the makers' data lists for ammonia and methylamine

North: N75004L (green label), 7584P100L (green and magenta), and the Defender 75SCL and 75SCP100L include ammonia and methylamine; the 7904 mouthbit is the escape device for ammonia. Dräger: bayonet AM/MA 6738027 and AM/MA/P100 6738037, the Multi-Gas+ filters, and the PAPR MultiGas filters. The manufacturer names the 7584P100L as the same cartridge as the N75004L with a P100 filter attached (support article).

North cartridges and filters whose chart entry covers it

Source: North Cartridge & Filter Reference Chart; NIOSH approval labels (PIP).

North facepieces

Source: North product sheets (PIP).

Dräger filters listed for it

Source: Dräger Guide for Selection and Use of Respiratory Filtering Devices, NIOSH (DMC-104642); Dräger X-plore Bayonet Filters NIOSH product information (DMC-109824); Dräger X-plore 8000 product information (DMC-102510).

Dräger masks

Source: Dräger Product Catalog, Industrial Applications (DMC-107423).

Dräger X-plore 8000 PAPR blowers

Source: Dräger X-plore 8000 product information (DMC-102510).

Dräger selection guide entries

3 entries in the Dräger respiratory selection guide match ammonia and methylamine; each names the filters by part number.

Source: Dräger Respiratory Protection Selection Guide (PIP document library).

Assigned protection factor

Source: OSHA 29 CFR 1910.134 Table 1 (Assigned Protection Factors). The APF applies only when the respirator is used in a program that meets the standard, including fit testing of tight-fitting facepieces (29 CFR 1910.134(f)) and a cartridge change schedule (29 CFR 1910.134(d)(3)(iii)).

Guides: half mask vs full facepiece · assigned protection factors · cartridge change schedules · P100 vs N95 vs R95 · what OSHA requires for fit testing · cleaning and storing respirators.

Respirators for Ammonia and Methylamine questions

What color is the ammonia cartridge? Green on the North chart (N75004L); green and magenta with the P100 filter (7584P100L).

What is the ammonia IDLH? 300 ppm (NIOSH Pocket Guide); OSHA PEL 50 ppm TWA.