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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The 3h-EC10 for op-TSA is 10.5 mg/L (nominal) for microorganisms.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
10.5 mg/L

Additional information

One study, valid without restrictions, is available with Chloramine T (CAS 127 -65 -1)

(Geerts, 2012). As Chloramine T is instantly converted to p-TSA in the presence of organic material and p-TSA shows similar toxicity to op-TSA, this study can be used for op-TSA as well. Toxicity to microorganisms was determined according to OECD Guideline 209 and the 3h-EC10 was found to be 14 mg/L (nominal). The 3h-EC50 was 37 mg/L (nominal). Converted to op-TSA the 3h-EC10 and and 3h-EC50 are 10.5 mg/L and 27.8 mg/L, respectively.