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EC number: 200-772-0
CAS number: 72-17-3
Sodium lactate as such is a solid
organic salt, but due to its hygroscopic properties, it is only
available and marketed as an aqueous solution. Therefore, the melting
and boiling point of “pure” Sodium lactate are calculated using QSAR and
are 174.03 °C and 436.7 °C, respectively. The ionic compound has a water
solubility of 1086 g/L at 25 °C. The corresponding partition coefficient
octanol-water was determined in a study conducted according to OECD 107
with log Pow -1.52 at 20 °C, which is derived by read across to its
enantiomer, Sodium (S)-lactate (chirality has no or only minor influence
on this physical-chemical property).
As pure Sodium lactate is not
available, the relative density of the substance can only be indicated
for highly concentrated (60 - 77.15 % w/w) aqueous solutions. The values
range from 1.3131 for a 60 % w/w solution to 1.4085 for a 77.15 % w/w
solution. The QSAR estimate for vapour pressure indicates a negligible
value of 5.8E-8 Pa for the pure substance. A calculation of the pKa
value was not possible as no half-equivalence point could be determined
with the titration method conducted according to OECD 112. The surface
tension of the target substance is 71.8 mN/m at 20.0 °C as determined in
a GLP study conducted according to OECD 115 and EU Method A.5 and in
addition surface tension is a desired property of the substance.
Finally, Sodium lactate has neither flammable, explosive nor oxidizing
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