Sodium dodecyl sulfate is an anionic surfactant, and is a typical representative of sulphate-based surfactant. It is abbreviated as SDS, and also known as AS, K12, coco alcohol sulfate, sodium lauryl sulfate and foaming agent. The commercial products are usually white to light yellow crystalline powder. It is non-toxic, slightly soluble in alcohol, insoluble in chloroform and ether, soluble in water, and has good anionic and nonionic complex compatibility. It has good emulsibility, foamability, and foaming, infiltrating, decontaminating and dispersing properties. It is abundant in foams and quickly biodegradable, and has solubility next only to fatty alcohol polyoxyethylene ether sodium sulphate (abbreviated as AES). It is not sensitive to alkali and hard water, but its stability is inferior to general sulfonate under acidic conditions and is close to AES. It is not favorable to exceed 95 °C upon long-term heating, and its irritation is at the middle level among surfactants, with an irritation index of 3.3 for a 10% solution, which is higher than AES and lower than sodium dodecyl benzene sulfonate (abbreviated as LAS). Toxicity LD50 is 1300mg/kg. There is no evidence that this product is carcinogenic, but high doses may indeed irritate the skin. However, in general sanitary products the concentration is limited when used as a foaming agent, and is in line with national standards. So there is no need to concern.
Sodium dodecyl sulfate is a major component of detergent. It is usually used in the DNA extraction process to separate DNA after protein denaturation. It is often misread as sodium dodecyl sulfonate. It is widely used as a foaming agent in toothpaste, soap, shower gel, shampoo, detergent and cosmetics. 95% of personal care products and household cleaning products contain sodium lauryl sulfate.
1. Basic Product Parameters
This section covers the authoritative and standardized basic indicators of sodium dodecyl sulfate, supporting industrial production, laboratory testing and product filing.
CAS Number: 151-21-3
Molecular Formula: C₁₂H₂₅NaO₄S
Molecular Weight: 288.38 g/mol
Common Synonyms: Sodium Lauryl Sulfate (SLS), K12, Dodecyl Sulfate Sodium Salt, Coco Alcohol Sulfate Sodium
Appearance: White to pale yellow free-flowing crystalline powder, odorless or with slight characteristic smell
Active Content: 92%~95% (industrial grade customizable)
pH Value (1% Aqueous Solution): 7.5-9.5
Biodegradability: Rapid and complete biodegradation, environmentally friendly and pollution-free
Sodium dodecyl sulfate Chemical Properties Melting point 204-207 °C (lit.) bulk density 490-560kg/m3 density 1.03 g/mL at 20 °C 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 6-9 (10g/l, H2O, 20℃) PH Range 7.2 biological source synthetic (oragnic) Water Solubility ca. 150 g/L (20 ºC) λmax λ: 260 nm Amax: 0.3
λ: 280 nm Amax: 0.2Merck 14,8636 BRN 3599286 Cosmetics Ingredients Functions CLEANSING
SURFACTANT - CLEANSING
DENATURANT
FOAMINGInChI 1S/C12H26O4S.Na/c1-2-3-4-5-6-7-8-9-10-11-12-16-17(13,14)15;/h2-12H2,1H3,(H,13,14,15);/q;+1/p-1 InChIKey DBMJMQXJHONAFJ-UHFFFAOYSA-M LogP 1.600 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 TSCA listed HazardClass 4.1 PackingGroup III HS Code 29209010 Storage Class 11 - Combustible Solids Hazard Classifications Acute Tox. 4 Oral
Aquatic Chronic 3
Eye Dam. 1
Skin Irrit. 2Hazardous Substances Data 151-21-3(Hazardous Substances Data) Toxicity LD50 orally in rats: 1288 mg/kg (Walker)
2. Core Product Performance Advantages
SDS stands out among common anionic surfactants due to its balanced comprehensive performance, solving many pain points in daily chemical and industrial production.
Excellent Foaming Performance: It can produce rich, delicate and stable foam at room temperature, with fast foaming speed and long foam retention time, which is far superior to many low-grade foaming agents.
Strong Anti-hard Water Ability: It is stable in hard water with high mineral content, will not produce precipitation or failure of decontamination and foaming functions, and adapts to various water quality environments.
Wide Compatibility: It can be perfectly compounded with nonionic surfactants, partial amphoteric surfactants and various auxiliary agents, effectively improving the overall formula stability and use effect.
Eco-friendly & Safe: It has no carcinogenic risk, low natural toxicity, moderate skin irritation, and meets the safety standards of daily chemicals and household cleaning products in most countries.
Superior Infiltration & Dispersion: It has excellent surface activity, can quickly reduce water surface tension, and effectively disperse oil stains, dust and organic sediments.
3. Detailed Application Scenarios
3.1 Daily Chemical & Personal Care Industry
As a classic foaming and decontaminating raw material, SDS is the core formula component of most daily cleaning products. It is widely added in toothpaste, shampoo, body wash, hand sanitizer, facial cleanser and solid soap. It can create comfortable fine foam, remove skin and hair surface oil and dirt efficiently, and improve the cleaning feeling of products. After standardized dosage control, it will not cause excessive irritation to human skin and oral mucosa, fully complying with daily chemical production specifications.
3.2 Household & Industrial Cleaning Industry
It is a key raw material for laundry detergent, washing powder, dishwashing liquid and industrial hard surface cleaners. It can efficiently decompose kitchen oil stains, clothing organic dirt and industrial dust. When compounded with AES and LAS surfactants, it can significantly improve the detergency of cleaning products. In addition, it is suitable for textile cleaning and leather degreasing processes, with stable cleaning effect and no damage to material texture.
3.3 Biochemical Laboratory & Scientific Research Field
High-purity SDS is an indispensable reagent in molecular biology experiments. It is mainly used for SDS-PAGE protein electrophoresis, protein denaturation, cell lysis and DNA extraction experiments. It can destroy the spatial structure of proteins, isolate protein components from DNA, and ensure the accuracy and stability of biological macromolecule separation and analysis. It is widely used in university laboratories, biological research institutions and biopharmaceutical factories.
3.4 Industrial Auxiliary Fields
In industrial production, SDS can be used as an emulsifier for emulsion polymerization to stabilize reaction systems and improve product uniformity. It also serves as a wetting agent and scouring agent in textile printing and dyeing, improving fabric dyeing uniformity. Besides, it can be applied as mineral flotation agent, fire-fighting foam additive and electroplating auxiliary agent, with diverse industrial application values.
4. Packaging, Storage & Transportation Specifications
4.1 Standard Packaging
The conventional packaging is 25kg per compound bag with inner PE moisture-proof lining, which is dust-proof, moisture-proof and tear-resistant. Customized 1000kg bulk bag packaging is available for large-batch industrial orders. Support customized outer bag printing and packaging marking according to customer requirements. The minimum order quantity is 1 full container load (FCL), with about 17 tons loadable per 20ft container.
4.2 Storage Requirements
Store in a cool, dry, ventilated and clean indoor warehouse. Keep the packaging tightly sealed at all times to prevent moisture absorption and caking. Keep away from direct sunlight, high-temperature heat sources, strong oxidants and strong acidic substances. The recommended storage temperature is 15-25°C. Long-term high-temperature storage above 95°C is prohibited to avoid performance attenuation. Strictly separate from food and edible raw materials during storage.
4.3 Transportation Standards
This product is non-dangerous goods for conventional sea and land transportation. During transportation, avoid violent extrusion, packaging damage and long-term rain soaking. It is forbidden to transport together with strong corrosive, oxidizing and edible materials. We will paste standard export shipping marks and safety labels on all packages to ensure smooth customs clearance and safe transportation.
5. Quality Inspection & Certification Standards
All batches of sodium dodecyl sulfate are produced in strict accordance with industrial production specifications. Each batch of products will undergo strict laboratory testing before delivery, including active content detection, pH value test, moisture content analysis and impurity inspection. We can provide complete export documents including COA quality certificate, MSDS safety data sheet, packing list and commercial invoice. SGS, BV and other third-party authoritative inspection services are acceptable according to customer needs. All production and testing records are archived for long-term quality traceability.
6. After-sales Service & Technical Support
6.1 Pre-sales Service
Provide free product sample testing services for new customers. Professional technical team provides one-on-one product grade selection, formula compatibility guidance and industry application scheme consultation. Support flexible quotation methods such as FOB, CIF and DAP, and negotiable payment terms for long-term cooperative customers.
6.2 In-sales Tracking
Arrange special personnel to track production progress, container loading and logistics status in real time, and update order information regularly. Support on-site loading supervision and factory inspection by customers.
6.3 After-sales Guarantee
Provide 24-hour online after-sales consultation service. If product quality problems caused by production factors are confirmed after arrival, we will provide solutions such as product replacement, replenishment and compensation in accordance with the contract. Provide long-term technical support for product storage, formula use and problem solving to help customers optimize production efficiency.
7. Customer Cooperation Cases
Our SDS/K12 products have been stably exported to Southeast Asia, the Middle East, Africa, Europe and other regions for a long time. We have established long-term cooperative relationships with many daily chemical manufacturers, cosmetic raw material distributors, biochemical research institutions and textile auxiliary factories. Our products are widely used in the mass production of shampoo, toothpaste, household detergents and industrial cleaning agents. With stable batch quality, complete supporting documents and timely delivery, we have obtained high recognition and repeated orders from global customers, and are familiar with the chemical import customs clearance policies and quality standards of various countries.
8. Frequently Asked Questions (FAQ)
Q1: What is the essential difference between SDS and sodium dodecyl sulfonate?
They are two completely different surfactants and often confused in application. SDS (sodium dodecyl sulfate) belongs to sulfate surfactants with -OSO₃Na functional group, while sodium dodecyl sulfonate has -SO₃Na functional group. SDS has better foaming performance and water solubility, while sulfonate has stronger acid resistance and chemical stability. They cannot be substituted for each other in formula preparation and laboratory experiments.
Q2: What surfactant types are compatible with SDS?
SDS is a typical anionic surfactant. It has excellent compatibility with nonionic surfactants and most amphoteric surfactants, which can synergistically improve product performance. It is not recommended to be directly mixed with cationic surfactants, as it will cause flocculation and precipitation, resulting in the loss of surface activity.
Q3: Is SDS safe for long-term use in daily chemical products?
Absolutely safe when used within the national standard dosage range. There is no scientific evidence proving its carcinogenicity. The slight skin irritation can be completely eliminated by reasonable formula compatibility and dosage control. It has been a mature and safe daily chemical raw material used globally for decades.
Q4: Can I get small-batch trial orders?
Our official MOQ is 1 FCL for bulk orders to ensure cost and shipping advantages. For new customers who need to verify product quality, we can provide small-quantity free samples for laboratory testing and formula trial production.
Q5: What factors will affect the use effect of SDS?
Long-term high-temperature heating (exceeding 95°C) will reduce its activity; strong acidic environment will weaken its stability; unreasonable compounding with surfactants will cause performance failure. It is recommended to store and use it under neutral and low-temperature conditions to maximize its efficacy.
9. Advantages of Choosing Our Products
We are a professional chemical raw material export supplier with years of industrial experience. We have stable production capacity and sufficient spot inventory to ensure on-time delivery. Strict batch-to-batch quality control ensures stable product indicators without large fluctuations. We provide one-stop full-process services including consultation, quotation, inspection, logistics and after-sales. For long-term partners, we support customized product indicators, exclusive packaging and personalized supply schemes, helping customers reduce costs and stabilize product quality.
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