Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Appearance/physical state/colour

Phenylhydrazine exists as yellow to pale red-brown crystals or as a yellowish oily liquid, with a characteristic odour.

Melting point/freezing point

The freezing point was determined to be approximately 25 °C.

Boiling point

The boiling point was determined to be 234.5 °C at 1.013 mbar

Density

The relative density of the test substance was determined to be 1.0987 g/cm3 at 25 °C.

Vapour pressure

The vapour pressure of the test substance was determined to be 0.06 mbar at 20 °C, 1.2 mbar at 30 °C and 4 mbar at 50 °C.

Partition coefficient

In an experimental study the partition coefficient of the test substance was determined to a log Pow of 1.25.

Water solubility

The water solubility was determined to be 145 g/L at 25 °C and at 70 °C the test substance was completely soluble.

Flash point

The flash point was determined to be 86 °C (DIN 51758).

Auto flammability

The ignition temperature was determined to be 205 °C (DIN 51794).

Viscosity

The viscosity was determined to be 17.1 mPa s at 20 °C.