Sodium dodecyl sulfate CAS：151-21-3
Excellent Surfactant Properties: It delivers powerful emulsification, foaming, penetration, detergency, and dispersing capabilities.
Broad Compatibility: The product exhibits good compatibility with both anionic and non-ionic compounds.
Rapid Biodegradability: It breaks down quickly in the environment, offering an eco-friendly profile.
High Water Solubility: It dissolves readily in water, enabling easy formulation across a variety of applications.
Sodium dodecyl sulfate, or SDS for short, is a classic anionic surfactant, well-known as a flagship representative of the sulfate-based surfactant family. It carries multiple industry aliases, including AS, K12, sodium coco-sulfate, sodium lauryl sulfate, and industrial foaming agent.
Typically, this non-toxic product is available commercially as a white to pale yellow crystalline powder. While it has only limited solubility in alcohol and cannot dissolve in chloroform or ether, it mixes extremely readily with water. This ingredient features excellent compatibility with both anionic and non-ionic chemical substances.
It delivers powerful performance across emulsification, foaming, wetting, cleaning and dispersion, generating rich lather while offering fast biodegradation properties. That being said, its water solubility is relatively weaker when measured against sodium fatty alcohol polyoxyethylene ether sulfate (AES).
Parameters
| Melting point | 204-207 °C (lit.) |
| density | 1.03 g/mL at 20 °C |
| bulk density | 490-560kg/m3 |
| FEMA | 4437 | SODIUM LAURYL SULFATE |
| Fp | >100°C |
| storage temp. | 2-8°C |
| solubility | H2O: 0.1 M, clear to nearly clear, colorless to slightly yellow |
| form | Powder or Crystals |
| color | White to pale yellow |
| Odor | Slight fatty odour |
| PH Rane | 7.2 |
| PH | 6-9 (10g/l, H2O, 20℃) |
| biological source | synthetic (oragnic) |
| Water Solubility | ca. 150 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: 0.3 |
| λ: 280 nm Amax: 0.2 | |
| Merck | 148,636 |
| BRN | 3599286 |
| InChIKey | DBMJMQXJHONAFJ-UHFFFAOYSA-M |
| LogP | 1.6 |
| CAS DataBase Reference | 151-21-3(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium lauryl sulfate (151-21-3) |
| Absorption | ≤0.1 at 280nm in water at 30mg/mL |
Safety Information
Hazard Codes | F,Xn,Xi |
Risk Statements | 36/37/38-36/38-22-11-21/22-42-41-20/21/22-37/38 |
Safety Statements | 26-36/37-36/37/39-36-22-39 |
RIDADR | UN 2926 4.1/PG 2 |
WGK Germany | 2 |
RTECS | WT1050000 |
F | 3 |
TSCA | Yes |
HazardClass | 4.1 |
PackingGroup | III |
HS Code | 29209010 |
Hazardous Substances Data | 151-21-3(Hazardous Substances Data) |
Toxicity | LD50 orally in rats: 1288 mg/kg (Walker) |
