Registration Dossier
Registration Dossier
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reaction mass of: trisodium 3-(5-(2,6-difluoropyrimidin-4-ylamino)-2-sulfonatophenylazo)-5-(4-fluoro-6-morpholin-4-yl-1,3,5-triazin-2-ylamino)-4-hydroxy-2,7-naphthalenedisulfonate; trisodium 3-(5-(4,6-difluoropyrimidin-2-ylamino)-2-sulfonatophenylazo)-5-(4-fluoro-6-morpholin-4-yl-1,3,5-triazin-2-ylamino)-4-hydroxy-2,7-naphthalenedisulfonate
EC number: 436-890-6 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
The dissociation constant was determined to be between 0.6 and 5.3 at 22°C in the acidic pH range.
No clear dissociation was observed in the alkaline range.
Key value for chemical safety assessment
Additional information
A study was performed to determine the dissociation constant of the test substance according to OECD guideline 112 and in compliance with GLP.
Dissociation was determined using spectrophotometric determination. The pKa determination was performed by adding test substance to hydrochloric acid or sodium hydroxide solution and measuring subsequently the pH and the UV-Vis spectra (200 to 800 nm) of each resulting solution.
The dissociation constant was determined to be between 0.6 and 5.3 at 22°C in the acidic pH range.
No clear dissociation was observed in the alkaline range.
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