methanal, methyl aldehyde, methylene oxide, formalin

How to detect Formaldehyde

Formula: CH2O | CAS: 50-00-0

Synonyms: methanal, methyl aldehyde, methylene oxide, formalin

Formaldehyde is normally prepared as a 43% solution in water as formalin. It is used chiefly in the formation of resins used in binding of wood products such as fibreboard, in manufacture of coatings and medicines.


Specification Value/Information
Formula CH2O
CAS no. 50-00-0
Gas Response Factor, 11.7 eV 0.6
Gas Response Factor, 10.6 eV ZR
Gas Response Factor, 10.0 eV ZR
ppm per mg/m⁻³, (20 °C, 1 bar) 0.801
Molecular Weight, g/mole 30.0
Melting point, °C -92
Boiling point, °C -19.1
Flash point, °C 45
Lower Explosive Limit, % 7
Specification Value/Information
Density,⁻³ 1.08
Ionisation Energy, eV 10.87
EH40 TWA, ppm 2
EH40 TWA, mg.m⁻³ 2.5
EH40 STEL, ppm 2
EH40 STEL, mg.m⁻³ 2.5
NIOSH TWA REL, ppm 0.016
NIOSH ceiling, ppm 0.1
NIOSH IDLH, ppm 20
OSHA TWA PEL, ppm 0.75