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EC number: 200-609-3 | CAS number: 65-45-2
Crystal morphology obtained from water was as needles.
Solubility data were fitted to the equation ln x = A(K/T)^2 + B(K/T) + C where A=12.693x10 -5, B=-12.437x10 -3, C=19.3719, x is the mole fraction, and for the fit R2>0.998.
2000 mg/L, 20 °C, Edwards 19531980 ±15 mg/L, 20 °C, OECD 105, modified flask method, Nordström 2006
The data from Gloria (1963) is discarded, as the solubility-temperature curve clearly shows problems with the experimental method.
The data from Edwards (1953), Nordström (2006) and Shah (1990) are in excellent agreement, although the latter only gives solubility at one temperature. The average uncertainty in the solubility reported by Nordstöm was 2.5% (95% C.I.), with a maximum of 8% (at 35 °C). Plots of both solubility-temperature curves show the expected smooth increase in solubility with increasing temperature, and are coincident to within ca. 2% at common temperatures. The data sets, which are produced by different methods and from independent samples, are thus consistent and considered to be reliable and adequate. The average was taken at 20 °C, 1990mg/L (±20 mg/L, 95% C.I.), and is taken forward for risk assessment, classification and labelling, based on the weight-of-evidence in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.2.
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