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EC number: 236-337-7
CAS number: 13308-51-5
Dissolved boron orthophosphate (GLP, OECD 105, flask method): Unbuffered solution: 0.143 g/L (final solution pH 3.1 - 3.5)
The water solubility of boron orthophosphate
was determined using the flask method in a study conducted
according to EU Method A.6 under GLP conditions (O’Connor and Woolley,
ion chromatography method applied directly quantified the dissolved
phosphate content of each sample solution and these have been corrected
to equivalent test material concentrations based on the theoretical
phosphate content of the test material.The
water solubility of the test material has been determined to be
approximately 0.143 g/l of solution at 20.0 ± 0.5°C in un-buffered glass
double-distilled water, resulting in sample solution pH’s in the range
3.1 to 3.5.
addition, the water solubility was demonstrated to be both temperature
and pH dependent. Solubilities
of 9.44 x 10‑2 g/l, 0.121 g/l and 0.143 g/l
were determined at test temperatures of 10°C, 20°C and 30°C respectively
following a common 72 hour saturation period at 30°C. Increased
solubility was observed in both pH 4 buffer solution and pH 9 buffer
solution when compared to that observed under identical conditions in
un-buffered glass double-distilled water.
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