Sodium Dodecyl Sulfate
time:2012-09-07 15:46:25,count:0
Properties
Appearance    (1), white to slightly yellow crystals, flakes, or powder; (2), liquid (Solution).
Odor    faint characteristic odor.
Solubility    soluble in water, solubility in water is less than sodium laureth sulfate.Aqueous solution is colorless transparent to translucent, transparency influenced greatly by concentration and temperature. Generally, as the concentration increases, the opacity will increases; as the temperature decreases, the opacity will also increases.
Hygroscopicity    hygroscopic. Powdery SDS cakes easily, but the cake strength is not high.
Physical - chemical properties
Water solubility, g/L
100 (Not specified temperature)[1]
196 (20°C)[2]
Density, g/cm3
> 1.11 (20°C)[2]
Melting point, °C
205.5[1]
193 - 207[2]
Surface tension, mN/m
42.6 (20°C, 0.1%)[2]
55.9 (20°C, 100mg/L)[2]
39.5 (25°C, CMC)[3]
Log Kow (octanol - water)
1.6[1,2]
HLB
40
Flash point, °C
> 93
CMC, mmol/L, 25°C
8.0 - 8.4[2]
Krafft point, °C
16 / 17[2]
Stability    stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol. Under acidic condition, hydrolytic stability is less than sodium dodecyl sulfonate, similar to sodium laureth sulfate.
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