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Description of key information

Dipotassium persulfate was tested for acute toxicity via the oral, dermal and inhalation routes. In an acute oral toxicity study a LD50 value of 1130 mg/kg bw was determined. In an acute dermal toxicity study LD50 and LD0 values of greater than 10000 mg/kg bw and 10000 mg/kg bw, respectively, were determined. In an acute inhalation toxicity study LC50 and LC0 values of greater than 42.9 mg/L and 42.9 mg/L, respectively, were revealed. Additional studies were available for substances of the Persulfate Category, diammonium persulfate and disodium persulfate.

Key value for chemical safety assessment

Acute toxicity: via oral route

Endpoint conclusion
Dose descriptor:
LD50
1 130 mg/kg bw

Acute toxicity: via inhalation route

Endpoint conclusion
Dose descriptor:
LC50
42 900 mg/m³

Acute toxicity: via dermal route

Endpoint conclusion
Dose descriptor:
LD50
10 000 mg/kg bw

Additional information

Dipotassium persulfate was tested for acute toxicity via the oral, dermal and inhalation routes. In an acute oral toxicity study in male rats a LD50 value of 1130 mg/kg bw was determined. In an acute dermal toxicity study in male rabbits LD50 and LD0 values of greater than 10000 mg/kg bw and 10000 mg/kg bw were determined respectively. In an acute inhalation toxicity study in male rats LC50 and LC0 values of greater than 42.9 mg/L and 42.9 mg/L, respectively, were determined.

Of the Persulfate Category, diammonium persulfate and disodium persulfate were tested as well for acute oral, acute dermal and acute inhalation toxicity. In acute oral toxicity studies the LD50 value for diammonium persulfate was 742 mg/kg bw in the male rat and 700 mg/kg bw in the female rat and an LD0 value of 300 mg/kg bw in male rats. LD50 and LD0 values of 895 mg/kg bw and 500 mg/kg bw were determined for disodium persulfate.

The LD50 and LD0 values determined in an acute dermal toxicity in rat for diammonium persulfate were greater than 2000 mg/kg bw and 2000 mg/kg bw, respectively. For disodium persulfate LD50 and LD0 values of 10000 mg/kg bw and 10000 mg/kg bw, respectively were determined in an acute dermal toxicity in rabbit.

In acute inhalation studies, the LC50 and LC0 values for diammonium persulfate were greater than 2.95 mg/L and 2.95 mg/L, respectively. For disodium persulfate LC50 and LC0 values of greater than 5.1 mg/L and 5.1 mg/L, respectively were determined.

For the Persulfate Category worst-case values obtained were considered for safety assessment:

LD0 (oral): 300 mg/kg bw

LD0 (dermal): 2000 mg/kg bw

LC0 (inhalation): 2950 mg/m³.

Justification for classification or non-classification

Based on the results obtained, substances of the Persulfate Category were classified and labelled acute toxic, cat. 4 H302 (harmful if swallowed) according to Regulation (EC) No 1272/2008.