Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no emission to STP expected

Sediment (freshwater)

Hazard assessment conclusion:
no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:
no exposure of sediment expected

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no exposure of soil expected

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
insufficient hazard data available (further information necessary)

Additional information

The chemical intermediate "Dioxy Cuite Brute 58%" named "DCB" is a mixture of molecules and mainly composed by 4,4'-sulfonyldiphenol (BPS) and other sulfonated phenol sodium salts (from phenol sulfonic acid and phenol: see section 1.2 for the detailed composition).

DCB is soluble in water and a little amount of solvent. The salified form increases the solubility of the molecules compared to the acid form.

Approximately the 14% of the organic part of the mixture is the salified form of the phenol sulfonic acid, the benzenesulfonic acid, 4-hydroxy-, sodium salt (1:1), CAS 825-90-1, that in its acid form is a very acidic substance.

In this case, a category approach based on the salified sulfonic acids (hydrotropes) can be taken into account for the hazard evaluation of the whole intermediate mixture DCB 58%.

The specific cation is not expected to have an appreciable effect on fate, ecotoxicity or mammalian toxicity and therefore, the dataset for the entire hydrotropes category can be applied broadly.

The 2,4'-BPS 5397-34-2 Phenol, 2-[(4-hydroxyphenyl) sulfonyl]- is present at 6%.

Phenol is present at 1.8%.

 

Considerations regarding the conclusion of every endpoint is reported in the corresponding IUCLID section.

Conclusion on classification

In order to classify the whole mixture for the environmental toxicity, the available classification and the results of the reported studies of every known component has been taken into account.

4,4'-sulfonyldiphenol (BPS): non classified

Benzenesulfonic acid, 4-hydroxy-, sodium salt (1:1)- hydrotropes, sodium xylene sulphonate (category approach): non classified

2,4'-sulfonyldiphenol: H314 (C&L ECHA Inventory): non classified

Phenol: H411

Approximately 48% of the organic part of the intermediate under registration is composed by BPS.

Approximately the 14% of the organic part of the mixture is the salified form of the phenol sulfonic acid, benzenesulfonic acid, 4-hydroxy-, sodium salt (1:1).

Actually, this substance is completely salified, and therefore a category approach based on the hydrotropes should be taken into account for a more realistic classification of the whole intermediate mixture DCB, that it is in the neutralized form.

2,4'-sulfonyldiphenol is present at 6%, but no data on its toxicity are available (non classified).

Phenol, classified for long-term ecotoxicity, is however present in a low concentration (1.8 %) and for the evaluation of chronic ecotoxicity, the presence >= 25 %, shall be taken into account.

No data on biodegrability of the whole mixture, which makes up the intermediate to be registered, DCB, is available.

The whole mixture comprising the intermediate to be registered, DCB, presents no data available on biodegradability.

In conclusion, the chemical intermediate DCB 58% is not classified for the environment. In addition, no exposure of the aquatic environment, sediment, soil and air is expected.