Ammonia (NH₃)

CAS Number: 7664-41-7
Ammonia (NH₃) is a colorless gas with a sharp, pungent odor widely used in refrigeration systems, agriculture (fertilizers), cleaning products, and chemical manufacturing. At elevated concentrations, ammonia is a severe respiratory irritant, causing coughing, burning of the nose and throat, and at high levels, pulmonary edema and chemical burns to mucous membranes. It is also flammable at concentrations between 15% and 28% in air. Workers in agricultural settings, cold storage facilities, wastewater treatment plants, and refrigeration systems are at the greatest risk of exposure. Real-time ammonia monitors are critical for leak detection and ensuring safe working conditions.

Ammonia (NH₃) exposure is a serious respiratory and eye hazard, especially during leaks from refrigeration and industrial processes. Rent ammonia monitoring instruments from RAECO Rents for cold storage and refrigeration systems, chemical manufacturing, agricultural operations, and wastewater facilities. We provide practical support selecting the right detector and sensor for the job, with fast turnaround and phone support so you can get usable field readings quickly.

Regulatory Exposure Limits

As of March 17, 2026

OSHA PEL
TWA: 50 ppm (35 mg/m³)
STEL: N/A
C: N/A
NIOSH REL
TWA: 25 ppm (18 mg/m³)
STEL: 35 ppm (27 mg/m³)
C: N/A
ACGIH TLV
TWA: N/A
STEL: N/A
C: N/A
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