Benzenesulfonic acid, C10-16-alkyl derivs.

Endpoint summary

Description of key information

The toxicity of the substance has been assessed by the repeated exposure over a period of 28-days by the three routes of exposure, oral, dermal and inhalation.

Key value for chemical safety assessment

Repeated dose toxicity: via oral route - systemic effects

Endpoint conclusion

Dose descriptor:

NOAEL

500 mg/kg bw/day

Study duration:

subacute

Species:

rat

Repeated dose toxicity: inhalation - systemic effects

Endpoint conclusion

Dose descriptor:

NOAEC

49.5 mg/m³

Study duration:

subacute

Species:

rat

Repeated dose toxicity: dermal - systemic effects

Endpoint conclusion

Dose descriptor:

NOAEL

1 000 mg/kg bw/day

Study duration:

subacute

Species:

rat

Additional information

The repeat dose toxicity has been determined by subacute 28-day oral toxicity studies by oral, dermal and inhalation exposure. Based on the data available, the substance may have the potential for haemotological effects with a reduction in cholesterol observed in one of the studies by oral exposure. Affects observed in the repeat dose inhalation toxicity study available demonstated enlarged lungs in high and intermediate dose animals which are likely to be physical effects due to the inhalation of mineral oil and not necessarily a direct toxicological effect of the registered substance.

Furthermore, one dermal repeat dose study exists noting effects which resulted in the Study Director being unable to assign a NOAEL. Due consideration of these data has been taken, but the results are considered not representative of the toxicological effects of the substance since the observations have not been repeated in the remaining study with dermal exposure, nor following exposure by oral and inhalation routes which are generally considered to represent greater systemic exposure routes. Furthermore, effects to the testes of male rats were not been observed in the reproductive toxicity study. In consequence, although data are not available to adequately determine the cause of these effects, the fact that no similar observations have been found in any other study undertaken is considered adequate justification to regard these data as not representative of the toxicological profile of the registered substance.

Notwithstanding these effects, no further effects were observed in the studies and each study achieved a NOAEL. The data are therefore considered adequate to assess the toxicological profile of the substance and for the purposes of classification.

Repeated dose toxicity: via oral route - systemic effects (target organ) cardiovascular / hematological: other

Repeated dose toxicity: inhalation - systemic effects (target organ) respiratory: lung

Justification for classification or non-classification

Based on the NOAEL values available from these data, the substance is considered to be not classified under CLP.