Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The physico-chemical data of Reaction product of naphthalene, butanol, sulfonated and neutralized by caustic soda have been determined by a read-across approach based on analogue substance: Reaction product of naphthalene, propan-2-ol, sulfonated and neutralized by caustic soda.

In the following table, the physico-chemical properties of the Supragil WP are summarized:

Endpoint 

Experimental result

Melting point 

No melting point below 500°C

Boiling point

No boiling point below 500°C

Relative density 

1,525 at 19.5°C

Particle size distribution 

Particle size distribution range: 0.656μm to 152.541μm (laser diffraction method)

Mean diameter in volume: 36.628μm.

Mean diameter in surface: 18.486 μm.

Particle size D(0.1): 10.858 μm.

Particle size D(0.5): 34.304 μm.

Particle size D(0.9): 71.764 μm.

Vapour pressure

0.000021 Pa at 25°C

Partition coefficient 

-0.27 at 20°C

Water solubility 

604 g/l at 20°C

Surface tension

52 mN/m at 20°C

Flash point 

Waiving according to section 2 of REACH Annex XI, information requirement section 7.9, the study does not need to be conducted based on the physical state of the substance. According to ECHA guidance, flash point is only relevant to substances that are liquid at room temperature.

Auto Flammability 

269.3 at 101 325 Pa 

Flammability 

Non flammable

Explosiveness

Non explosive

Oxidising properties 

Non oxidising

Stability in organic solvents 

Waiving according to column 2 of REACH annex IX

Dissociation constant

In accordance with section 1 of REACH Annex XI, the dissociation constant study does not need to be performed as the substance is a salt. Salts are reaction products of acids and bases that retain their ionic character. The test item is a very strong acid, it is totally dissociated in water.

Viscosity 

In accordance with section 2 of REACH Annex XI, the viscosity does not need to be performed as the substance is a solid.

Exothermic decomposition energy (DSC analysis)

65 J/g at 290°C

Based on the result of the DSC analysis, the test item is considered as non auto reactive material.