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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

2,4 -dinitrophenol is a solid organic substance, with yellow colour and sweetish odour. It can be manufacture as platelets, leaflets or crystals

(The Merk Index, 1989).

It has a density of 1.683 g/cm^3 , a vapour pressure of 1.49 x 10 ^-5 mmHg at 18°C (Mabey WR, Smith JH, Podoll RT, et al., 1981), and it is soluble in water (5600 mg/L at 18°C and 2790 at 20°C from Schwarzernbach, RP., et al, 1988).

It shows solubility on different types of solvent (g/100 g solvent): 15.55 in ethyl acetate; 35.90 in acetone, 5.39 in chloroform; 20.05 in pyridine; 0.423 in carbon tetrachloride; 6.36 in toluene; it is soluble in alcohol and benzene (The Merk Index, 1989).

Its melting point is defined in the range of 112 -114°C and the boiling point cannot be defined because it sublimes when carefully heated (The Merk Index, 1989).

The substance in its pasty form, which is the only one marketed, with a water content > 15% is considered not explosive, but as a solid desensitised explosive. For this reason this wetted form permits to suppress its explosive properties (solid desensitised explosive)

2,4 -dinitrophenol has a dissociation constant of 4.09 (temperature not specified) and appear to be stable in acid solution (Pearce PJ, Simkins RJJ., 1968).

Its octanol-water partition coefficient Log Kow is 1.54, that suggest that 2,4 -dinitrophenol has a low ability to bioaccumulation in aquatic organisms.