Sodium dodecyl sulfate Cas 151-21-3
Product Description
Product Name: Sodium dodecyl sulfate
Synonyms: SDS
CAS No. 151-21-3
M.F.: C12H25NaO4S
M.W.: 288.38
EINECS: 205-788-1
Specifications
Items | Specifications | Results |
Characters | Description:Small,white or light yellow crystals having a slight,characteristic odor. | Conforms |
Solubility:Freely soluble in water,forming an opalescent solution. | Conforms |
Identification | A.Infrared absorption<197K>or<197A> | Conforms |
B.Sodium | Conforms |
C.Sulfate | Conforms |
D.A copious foam is formed | Conforms |
E.Chemical reaction | Conforms |
Sodium chloride | The combined content of sodium chloride and sodium sulfate is NMT8.0% | 0.03% |
Sodium sulfate | The combined content of sodium chloride and sodium sulfate is NMT 8.0% | 0.6% |
Alkalinity | NMT 0.5ml for neutralization | Conforms |
Total alcohols | The residue represents the total alcohols and is NLT 59.0% of the weight of Sodium Lauryl sulfate taken. | 62.5% |
Unsulfated alcohol | The weight of the residue is NMT 4.0% of the weight of Sodium Lauryl Sulfate taken. | 0.7% |
Assay | NLT 85.0%,calculated as Sodium Lauryl Sulfate. | 95.9% |
Conclusion | The product conforms to the above specifications. |
Welcome to contact us to get complete COA.
Sodium dodecyl sulfate (SDS), also known as sodium lauryl sulfate (SLS), is a synthetic organic compound and one of the most widely used surfactants (surface-active agents). Its chemical formula is CH₃(CH₂)₁₁OSO₃Na.
It consists of:
A hydrophobic 12-carbon tail (a dodecyl or lauryl chain).
A hydrophilic sulfate head group (negatively charged, anionic).
This amphiphilic structure allows it to reduce surface tension between liquids, solids, and gases, making it excellent at solubilizing, emulsifying, and foaming.
Key Properties & Mechanism
Anionic Surfactant: Carries a negative charge when dissolved in water.
Powerful Detergent: Disrupts non-covalent bonds in proteins and lipids, solubilizing them.
Denaturing Agent: Unfolds proteins by breaking their native 3D structure.
Excellent Foaming Agent: Creates abundant, stable lather.
Major Uses of SDS
1. Laboratory & Research
This is where the name SDS is primarily used.
SDS-PAGE (Polyacrylamide Gel Electrophoresis): The most critical use. SDS binds to and denatures proteins, giving them a uniform negative charge. This allows separation in a gel based solely on molecular weight, a fundamental technique in biochemistry and molecular biology.
Cell Lysis & Nucleic Acid Extraction: Used to break open cell membranes and nuclei to release DNA/RNA during purification protocols.
Cleaning Laboratory Glassware: Effective at removing organic residues.
2. Industrial & Manufacturing
Emulsion Polymerization: Acts as a surfactant to stabilize polymer particles (e.g., in synthetic rubber, polystyrene, and acrylic paints) during production.
3. Consumer Products
Here, it is most commonly listed as SLS or sodium lauryl sulfate.
Cleaning Products: A primary detergent in laundry detergents, dish soaps, and household cleaners.
Personal Care & Cosmetics:
Toothpaste: Creates foaming action, helping to disperse ingredients.
Shampoos, Shower Gels, Bubble Baths: Provides the rich lather that consumers associate with cleaning efficacy.
Shaving Creams: Acts as a foaming agent and lubricant.
Hand Soaps: Provides detergency and lather.
SDS vs. SLES: An Important Distinction
SDS/SLS is often confused with Sodium Laureth Sulfate (SLES). They are related but different:
SLES (CH₃(CH₂)₁₁(OCH₂CH₂)ₙOSO₃Na) contains an ethylene oxide chain, making it much milder and less irritating to skin and eyes.
SLES is far more common in personal care products like shampoos and body washes.
SDS is a stronger, more potent irritant but is highly valued in laboratories for its predictable, strong denaturing action.
Safety and Controversy
Irritation: SDS can be a skin, eye, and mucous membrane irritant, especially in high concentrations. This is why its concentration is controlled in consumer products.
"Sulfate-Free" Trend: Many personal care brands now market "sulfate-free" products, claiming benefits like being gentler on skin/hair and preserving hair color. This is primarily about avoiding SLS and SLES.
Misconceptions: While it can be drying or irritating for some individuals, extensive scientific reviews have found no evidence that SLS in cosmetics is a significant carcinogen. Regulatory bodies worldwide consider it safe for use in rinse-off products and at limited levels in leave-on products.
Summary
| Context | Common Name | Primary Use |
|---|
| Laboratory | SDS | Denaturing protein for electrophoresis (SDS-PAGE); cell lysis. |
| Industry | SLS/SDS | Emulsion polymerization for plastics, rubber, and paints. |
| Consumer Goods | SLS | Foaming and detergent agent in toothpastes, shampoos, cleansers, and soaps. |
In essence, SDS is a versatile workhorse surfactant: it's the scientific standard for protein analysis in labs and the engine behind lather in many everyday cleaning and personal care products.
Packing & Shipping
FAQ
1. Do you have stock?
As we know, most customers prefer stock, so we will try to keep stock for some products.
2. Could you please provide some samples?
In order to facilitate transaction, it's my pleasure to provide you samples.
3. How should I pay?
We accept various payment terms such as L/C,T/T, Western Union and Money Gram.
4. Is there a discount?
Different quantity has different discount.
5.What's your MOQ?
Different products have different MOQ, such as:
1).Peptide products, the MOQ is 1 gram level
2).Liquid products, the MOQ is usually 50-100ML
3).API, the MOQ is 1KG
4).Intermediate products and conventional product, the MOQ is 1KG; custom-tailored products, the MOQ depends on the production process.
5).Food additives and vitamin, the MOQ is usually one package: such as Vitamin C is 25KG / drum, Vitamin E oil or Vitamin A oil is 5KG/bag;Vitamin E powder or Vitamin A powder is 20KG / cartons.
6).Agrochemical , the MOQ is 1KG, except preparations.
6.How do we take the quality complaint ?
First of all, our quality control will reduce the quality issue to near zero. If there is a quality problem caused by us, we will send you free goods for replacement or compensate your loss.
Company Information
Company profile
Wuhan Fortuna Chemical Co.,Ltd established in 2006, is a big integrative chemical enterprise being engaged in Pharmaceutical & its intermediates, Food/Feed additives, Fine chemicals in distributing the products of our own company and affiliated enterprises, are the members of Hubei E-commerce Chamber.
Our company has professional persons who major in chemical R&D and sicentific management, supply fine chemical products with high quality and close service, also supply custom-tailored products according to our clients’ requirement.
We have a positive and self-motivated management work team with a common philosophy, caring and commitment through teamwork, our team strive to achieve success in delighting our clients and ourselves.
Since Wuhan Fortuna Chemical Co., Ltd founded, we continuously innovate our products and improve our service, sales network. Hence, we initiate the first sale mode on net in China, which is the retail trade of small package bring along wholesale of diversified management modes. Our products are exported widely to South Korea, Vietnam, Australia, Europe and South America, highly recommended by our clients.
We insist on the management creed “Market is our compass, Quality is our life, Credit is our soul”. Clients’ trust is our forward powder, their satisfaction is our struggling goal.
Factory and Lab show
China
