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Short-term toxicity to aquatic invertebrates

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Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Justification for type of information:
READ ACROSS CATEGORY APPROACH
A category group was formed with dipotassium peroxodisulphate (KPS), disodium peroxodisulphate (SPS) and diammonium peroxodisulphate (APS). Several physico-chemical, fate, ecotoxicological and toxicological endpoints were assessed using the category approach. Please refer to the read across justification in chapter 13 for further information.
Reason / purpose:
read-across source
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
120 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: 95 % CL: 103 - 139 mg/L
Duration:
48 h
Dose descriptor:
NOEC
Effect conc.:
41 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mortality
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Justification for type of information:
READ ACROSS CATEGORY APPROACH
A category group was formed with dipotassium peroxodisulphate (KPS), disodium peroxodisulphate (SPS) and diammonium peroxodisulphate (APS). Several physico-chemical, fate, ecotoxicological and toxicological endpoints were assessed using the category approach. Please refer to the read across justification in chapter 13 for further information.
Reason / purpose:
read-across source
Key result
Duration:
5 d
Dose descriptor:
EC50
Effect conc.:
11 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
other: faecal pellet production
Duration:
5 d
Dose descriptor:
NOEC
Effect conc.:
5 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
other: faecal pellet production

Description of key information

The acute toxicity of the Persulfate Category to aquatic invertebrates was tested in eight studies. Six studies were available for diammonium persulfate and two for disodium persulfate. The studies were in accordance to FIFRA guideline 72-2 and 72-3 of the pesticide assessment guidelines, OECD guideline 202 and EU Method C.2. The most sensitive LC50 (48 h) value for freshwater was determined at 120 mg/L and for marine water at 11 mg/L (5 d).

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
120 mg/L
EC50/LC50 for marine water invertebrates:
11 mg/L

Additional information

The acute toxicity of the Persulfate Category to aquatic invertebrates was tested in eight studies. Six studies were available for diammonium persulfate and two for disodium persulfate. For freshwater EC50 values ranged from 120-356.7 mg/L. The acute toxicity study to Daphnia magna with diammonium persulfate according to FIFRA guideline 72-2 of the Pesticide Assessment revealed an EC50 (48 h) of 120 mg/L, the most sensitive value available. For the marine water EC50 values ranged from 11-391 mg/L. The acute toxicity to marine invertebrate Abra alba with diammonium persulfate according to PARCOM Ring test protocol revealed an EC50 (5 d) of 11 mg/L, the most sensitive value available.