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EC number: 293-927-7
CAS number: 91648-65-6
Dissociation constant (OECD 112): 5.8 at 22 °C (mean of 7 determinations)
The key value was determined according to
OECD Guideline 112 (Rocchio, 1990). The UV/Vis absorption spectrum at
300 nm is obtained from solutions of constant concentration under a pH
condition where the substance is essentially unionized and fully ionized
and at several intermediate pHs. From the pH and absorbance values at
the chosen wavelength, seven values for the pKa are calculated using
data from at least 5 pHs where the compound is at least 10 % and less
than 90 % ionized.
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