Sodium dodecyl sulfate
SIGMA/71725 - BioUltra, for molecular biology, ≥99.0% (GC)
Synonym: Dodecyl sodium sulfate; Dodecyl sulfate sodium salt; Lauryl sulfate sodium salt; SDS; Sodium lauryl sulfate
CAS Number: 151-21-3
Empirical Formula (Hill Notation): C12H25NaO4S
Molecular Weight: 288.38
EC Number: 205-788-1
MDL Number: MFCD00036175
Linear Formula: CH3(CH2)11OSO3Na
Product Type: Chemical
| λ | 0.1 M in H2O |
| aggregation number | 62 |
| anion traces | chloride (Cl-): ≤200 mg/kg |
| phosphate (PO43-): ≤1 mg/kg | |
| assay | ≥99.0% (GC) |
| cation traces | Al: ≤5 mg/kg |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤10 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤5 mg/kg | |
| K: ≤200 mg/kg | |
| Li: ≤5 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Sr: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| CMC | 7-10 mM (20-25°C) |
| density | 0.455 g/cm3 |
| description | anionic |
| form | powder |
| grade | for molecular biology |
| HLB | 40 |
| impurities | DNases, none detected |
| insoluble matter, passes filter test | |
| phosphatases, none detected | |
| proteases, none detected | |
| RNases, none detected | |
| InChI | 1S/C12H26O4S.Na/c1-2-3-4- |
| InChI key | DBMJMQXJHONAFJ-UHFFFAOYSA |
| loss | ≤3% loss on drying, 20 °C (HV) |
| mol wt | micellar avg mol wt 18,000 |
| mp | 204-207 °C (lit.) |
| product line | BioUltra |
| Quality Level | 200  |
| SMILES string | [Na+].CCCCCCCCCCCCOS([O-] |
| solubility | H2O: 0.1 M at 20 °C, clear, colorless |
| suitability | suitable for electrophoresis |
| transition temp | cloud point >100 °C |
| UV absorption | λ: 260 nm Amax: 0.04 |
| λ: 280 nm Amax: 0.02 |
| Application: | Anionic detergent |
| Application: | Sodium dodecyl sulfate has been used: • as an ionic surfactant in polystyrene (PS) particle suspension for surfactant-based experiments • in phosphate-buffered saline as a component of lysis buffer to homogenize myometrium and leiomyoma tissue • as a component of lysis buffer to dissolve formazans • as a component of high-salt nuclear extraction buffer |
| Biochem/physiol Actions: | Sodium dodecyl sulfate (SDS) serves as an important detergent in the structural biology field and protein folding/unfolding studies. The sulfate groups and alkyl chains of SDS can strongly bind to the positively charged and the hydrophobic residues of proteins. SDS induces the formation of α-helices in a protein structure. At high concentrations, SDS stimulates cooperative unfolding in various proteins such as bovine serum albumin (BSA), hen egg-white lysozyme, -lactalbumin, and -lactoglobulin structures. |
| Features and Benefits: | • Suitable for molecular biology and biochemical research • BioUltra grade for your sensitive applications • Free from DNase, RNase, NICKase and protease • Tested for trace levels of Anions and Cations • Tested to confirm low levels of heavy metal contamination, ensuring suitability for various applications |
| Features and Benefits: | • Undergoes hydrolysis at high temperatures, especially in acidic medium |
| General description: | Sodium dodecyl sulfate (SDS), also known as sodium lauryl sulfate, is a versatile anionic surfactant with a broad range of applications in molecular biology, biochemistry, and various industries. Its amphiphilic nature, characterized by a hydrophobic hydrocarbon tail and a hydrophilic sulfate head group, makes it an effective detergent capable of solubilizing and denaturing proteins, lipids, and other hydrophobic molecules. In protein biochemistry, SDS plays a pivotal role in protein extraction and SDS-PAGE (sodium dodecyl sulfate-polyacrylamide gel electrophoresis). Its ability to denature proteins by disrupting their secondary and tertiary structures allows for their uniform migration during gel electrophoresis, enabling the separation and analysis of proteins based on their molecular weight. This technique has become an indispensable tool for identifying and characterizing proteins in biological samples. Beyond its role in protein analysis, SDS also finds utility in nucleic acid extraction and various hybridization techniques. Its detergent properties aid in the lysis of cells and the release of nucleic acids, facilitating their subsequent purification and analysis. Additionally, SDS is employed in hybridization techniques to promote the annealing of complementary nucleic acid strands, enabling the detection and analysis of specific DNA or RNA sequences. |
| Other Notes: | For additional information on our range of Biochemicals , please complete this form . |
| Symbol |   GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H302 - H315 - H318 - H412 |
| Precautionary statements | P264 - P273 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 |
| Hazard Codes | F,Xn |
| Risk Statements | 11-21/22-37/38-41 |
| Safety Statements | 26-36/37-39 |
| RIDADR | UN1325 - class 4.1 - PG 3 - Flammable solids, organic, n.o.s., H |
| WGK Germany | WGK 2 |
| Flash Point(F) | 338.0 °F |
| Flash Point(C) | 170 °C |
| Purity | ≥99.0% (GC) |
| mp | 204-207 °C (lit.) |
| Density | 0.455 g/cm3 |
| UNSPSC | 12161900 |