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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The physico-chemical properties of Reactive Brown 49 is as-

Appearance/physical state/colour:         dark red-brown powder

Melting point/ freezing point:                 >400 °C

Boiling point:                                        >400 °C (735 °C calc.)

Density:                                               1.81 g/cm3 at 20.2 °C

Particle size distribution (Granulometry): D50: 23 μm; <2.4% smaller 10 µm

Vapour pressure:                                 1.22 10 -23 Pa at 25 °C

Partition coefficient (log Pow):               < -4.5 at 20 °C

Water solubility:                                    277 g/l at 20 °C

Surface tension:                                   68.4 mN/m at 20 °C

Flash point :                                         N/A (data waiving)

Auto flammability:                                 >400 °C (self ignition temp.)

Flammability:                                        Non-flammable

Explosiveness:                                     Not explosive

Oxidising properties:                             No oxidising properties

Stability in organic solvents:                  stable in n-octanol

Dissociation constant:                           -7 (SO3H-group)

Additional information