Registration Dossier
Registration Dossier
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EC number: 226-247-6 | CAS number: 5333-84-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The EC50 value was determined as 69.87 mg/L.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 69.87 mg/L
Additional information
An activated sludge test has been conducted on tetrahydromethylphthalic anhydride (MTHPA), of which 3 -MTHPA D4 is an isomer following OECD test methds. An EC50 value of 69.87 mg/L was determined. An accurate NOEC value could not be determined, being lower than the lowest concentration of 10 mg/L investigated. Respiration rates were influenced (inhibited) dose dependently over the whole concentration range.
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