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EC number: 436-710-6 | CAS number: 756-13-8
Toxicity to fish
Exposure of fathead minnows to the test substance resulted in 24, 48, 72, and 96 hour LC50s greater than 1070 mg/L. The 96 hour NOEC is 1070 mg/L of PFPA. This concentration of the test substance allowed 100% survival and did not cause any sublethal effects.
Toxicity to aquatic invertebrates
For the PFPA in daphnids (Daphnia magna), the 48-hour effective concentration (EC50) is greater than 1080 mg/L (EC50 > 1080 mg/L). The 48-hour median lethal concentration (LC50) is greater than 1080 mg/L (LC50 > 1080 mg/L).
Toxicity to algae
The 72-hour and 96-hour acute toxicity of CAS# 756-13-8 to Pseudokirchneriella subcapitata was studied under static conditions. Pseudokirchneriella subcapitata was exposed to a negative control and CAS# 756-13-8 at nominal concentrations at 39, 75 and 150 mg/L for 96 hr. Dissolved CAS# 756-13-8 hydrolyzes completely with a half-life of 2.5 minutes to perfluoropropionic acid (PFPA, CAS# 422-64-0) and a volatile hydrofluorocarbon (heptafluoropropane). PFPA concentration was monitored by HPLC-MS. Measured exposure concentrations of PFPA were 1.77, 3.47 and 6.78 mg/L. The 72-hour and 96-hour EC50s based on average specific growth rate were >6.78 mg/L as PFPA. The 96-hour NOEC based on average specific growth rate was 3.47 mg/L as PFPA.
Toxicity to micro-organisms
Under the conditions of this present test, CAS# 756-13-8 was not toxic to waste water (activated sludge) bacteria at a nominal concentration of 100 mg/L.The 30 - minute EC50 was >100 mg/L.
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