Sodium dodecyl sulfate
CAS Number: 151-21-3
Chemical Formula: C₁₂H₂₅NaO₄S
Synonyms: Lauryl sulfate sodium salt, Lauryl sodium sulfate, Lauryl sulfate Na-salt, SDS, AS, K12
Appearance: White powder
HS Code: 29209010
Minimum Order Quantity (MOQ): 1 FCL (Full Container Load)
Product Description
Sodium dodecyl sulfate (SDS) is a widely used anionic surfactant and a classic representative of sulfatebased surfactants. It is commercially supplied as a white to pale yellow crystalline powder, non-toxic, slightly soluble in ethanol, insoluble in chloroform and ether, and highly soluble in water. It shows good compatibility with anionic and nonionic surfactants, and offers strong emulsifying, foaming, penetrating, cleaning and dispersing performance with rich foam and rapid biodegradability. Its water solubility is lower than that of fatty alcohol polyoxyethylene ether sulfate (AES).
Physicochemical Properties
| Parameter | Specification |
| Melting point | 204–207 °C (lit.) |
| Density | 1.03 g/mL at 20 °C |
| Bulk density | 490–560 kg/m³ |
| FEMA | 4437 |
| Flash point | >100 °C |
| Storage temperature | 2–8 °C |
| Solubility | H₂O: 0.1 M, clear to nearly clear, colorless to pale yellow |
| Form | Powder or crystals |
| Color | White to pale yellow |
| Odor | Slight fatty odor |
| pH | 6–9 (10 g/L, H₂O, 20 °C) |
| Water solubility | approx. 150 g/L at 20 °C |
| λmax | λ: 260 nm Amax: 0.3; λ: 280 nm Amax: 0.2 |
| Merck | 14, 8636 |
| BRN | 3599286 |
| InChIKey | DBMJMQXJHONAFJ-UHFFFAOYSA-M |
| LogP | 1.600 |
| Absorption | ≤0.1 at 280 nm in water at 30 mg/mL |
| CAS Database Reference | 151-21-3 |
| EPA Substance Registry | Sodium lauryl sulfate (151-21-3) |
Safety Information
| Item | Details |
| 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 |
| RID/ADR | UN 2926 4.1/PG 2 |
| WGK Germany | 2 |
| RTECS | WT1050000 |
| F | 3 |
| TSCA | Listed |
| Hazard Class | 4.1 |
| Packing Group | III |
| HS Code | 29209010 |
| Toxicity | LD₅₀ oral (rat): 1288 mg/kg |
| Hazardous Substances Data | 151-21-3 |
Main Applications
Sodium dodecyl sulfate provides excellent cleaning, emulsifying and foaming performance and is widely used in many fields:
Daily chemicals: Toothpaste foaming agents, shampoos, body washes, detergents
Textile industry: Wool and fine fabric cleaning agents, textile auxiliaries
Industrial fields: Emulsifiers for emulsion polymerization, mineral flotation agents, fire-fighting foams
Pharmaceutical & cosmetics: Emulsifying and dispersing agents
Food industry: Approved processing aid, foaming agent, emulsifier (GB 276096)
Analytical applications: Ionpair reagents, capillary electrophoresis additives, material modifiers
Delivery Time
Inventory orders: 2–3 working days
New production orders: 7–10 working days
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