Formaldehyde (CH₂O)

CAS Number: 50-00-0
Formaldehyde (HCHO) is a colorless, pungent gas that occurs naturally and is widely used as a preservative, disinfectant, and chemical intermediate in the production of resins, adhesives, and building materials such as particleboard and plywood. It is a known human carcinogen (IARC Group 1) associated with nasopharyngeal cancer and leukemia. Formaldehyde causes strong sensory irritation to the eyes, nose, and throat at low concentrations, and sensitization can lead to occupational asthma. Healthcare workers, embalmers, morticians, laboratory workers, and workers in wood products manufacturing are among those most commonly exposed.

Formaldehyde monitoring is common in labs, healthcare settings, manufacturing, and restoration work where formaldehyde-based products are used. Rent formaldehyde detection equipment from RAECO Rents to support personal monitoring, area checks, and ventilation verification during exposure assessments. All gas instruments are bump tested before shipment and supported with routine span calibration so crews can trust the readings in the field.

Regulatory Exposure Limits

As of March 17, 2026

OSHA PEL
TWA: 0.75 ppm [0.5 ppm Action Level]
STEL: 2 ppm
C: N/A
NIOSH REL
TWA: 0.016 ppm
STEL: N/A
C: 0.1 ppm [15 minutes]
ACGIH TLV
TWA: 0.1 ppm [2016]
STEL: 0.3 ppm [2016]
C: N/A
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