Registration Dossier

Diss Factsheets

Physical & Chemical properties

Flammability

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Green liquor is an alkaline aqueous non flammable inorganic UVCB substance (75% water at minimum). Some of the identified uses of green liquor require altering the pH of green liquor to acidic. Green liquor has dissolved sulfide/hydrogen sulfide (S2-/HS-) as a constituent. In contact with acids, HS is turned to flammable and volatile hydrogen sulfide (H2S).

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

Green liquor is an alkaline aqueous non flammable inorganic UVCB substance (75% water at minimum). Based on structural considerations, GL is not flammable in the chemical state at which it is manufactured and marketed and under the test conditions described in Test Guidelines A.9 A.10-A.13 of EC Regulation No 440/2008.

For liquids the primary value for ease of ignition is the flash point (A.9). The flash-point is the lowest temperature, corrected to a pressure of 101,325 kPa, at which a liquid evolves vapours, under the conditions defined in the test method, in such an amount that a flammable vapour/air mixture is produced in the test vessel.

 

At the chemical state GL is manufactured and marketed, no volatile flammable constituents are evolved from the substance.

Some of the identified uses of green liquor require altering the pH of green liquor to acidic. Green liquor has dissolved sulfide/hydrogen sulfide (S2-/HS-) as a constituent. In contact with acids, HS is turned to flammable and volatile hydrogen sulfide (H2S).

Justification for classification or non-classification

Green liquor is an alkaline aqueous non flammable inorganic UVCB substance (75% water at minimum). Based on structural considerations, GL is not flammable in the chemical state at which it is manufactured and marketed and under the test conditions described in Test Guidelines A.9 A.10-A.13 of EC Regulation No 440/2008. The substance is not flammable itself and no classification is required.

According to REACH Annex I (point 2.4), for every physicochemical hazard assessment property, the assessment shall entail an evaluation of the inherent capacity of the substance to cause the effect resulting from the manufacture and identified uses.

 

Some of the identified uses of green liquor require altering the pH of green liquor to acidic. Green liquor has dissolved sulfide/hydrogen sulfide (S2-/HS-) as a constituent. In contact with acids, HS is turned to flammable and volatile hydrogen sulfide (H2S).