Registration Dossier

Physical & Chemical properties

Endpoint summary

Currently viewing:

Administrative data

Description of key information

Additional information

Elementary sulfur is a solid substance at 20°C of yellow color and characteristic "sulfur oxide" smell (GLP Testing Facility EZA, 2002). It can occur as a (bulk) block if solidified from molten sulfur, or can be milled to powder. It can also occur (naturally) as "flower of sulfur" which looks like a yellow coral. Sulfur can be produced in its molten state and stored as a liquid at approximately 130°C.

It melts at 113-120 ˚C (CONCAWE 2010; ChemService S. r. l. Testing Laboratory, 2005a) and boils at 444.6˚C (Rapporteur Member State: France, 2008). Its density is 2.07 at 20˚C (Rapporteur Member State: France, 2008). Sulfur is virtually insoluble in water (solubility at 22˚C is less than 5 μg/L) (ChemService S. r. l. Testing laboratory, 2005c) and has a negligible vapour pressure (0.00014 Pa at 20 ˚C) (ChemService S. r. l. Testing Laboratory, 2005b).

Sulfur is non-flammable (flame propagation significantly less than 200 mm in 4 minutes) (Notox B. V., 2007) and non-explosive (ChemService S. r. l. Testing Laboratory, 2005d; ChemService S. r. l. Testing Laboratory, 2005e).

In accordance with Column 2 of REACH Annexes VII-X, the conductance of the studies on partition coefficient, surface tension, flash point, auto-ignition temperature, oxidising properties, dissociation constant, viscosity and stability in organic solvents is not warranted.

In accordance with Column 2 of REACH Annex VII, a study for granulometry does not need to be conducted if the substance is marketed or used in a non solid or granular form.

Particle size determination was performed on the dust sample of sulfur. The following values have been obtained (ChemService S. r. l. Testing Laboratory, 2005f):

D10 = 5.65 μm; D50 = 17.94 μm; D90 = 53.48 μm.