Registration Dossier
Registration Dossier
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reaction mass of: tetrasodium 7-(4-(4-fluoro-6-(4-(2-sulfonatoethylsulfonyl)phenylamino)-1,3,5-triazin-2-ylamino)-2-ureidophenylazo)naphthalene-1,3,6-trisulfonate;tetrasodium 7-(4-(4-hydroxy-6-(4-(2-sulfonatoethylsulfonyl)phenylamino)-1,3,5-triazin-2-ylamino)-2-ureidophenylazo)naphthalene-1,3,6-trisulfonate
EC number: 427-650-1 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKa = 3.2 for the acid range, using the six mean values of three experiments.
Key value for chemical safety assessment
- pKa at 20°C:
- 3.2
Additional information
A study was conducted according to OCED test guideline 112.
The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKa = 3.2 for the acid range, using the six mean values of three experiments.
The pKa value for the alkaline range was not determined because it was not recognized as a real one. The investigations for the hydrolysis show the decomposition of the test substance in alkaline solutions. The abiotic hydrolysis data of all reactive-dyes, determined in the testing facility, resulted in a half-life period at pH 9 and 25 °C of less than one day.
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