Factory Supply Sodium dodecyl sulfate Powder CAS 151-21-3 Raw Materials

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Uses and synthesis of Sodium dodecyl sulfate Powder

Sodium dodecyl sulfate Powder is soluble in water, slightly soluble in ethanol, almost insoluble in chloroform, ether and light petroleum. Stable to acid, alkali and hard water. 

Sodium dodecyl sulfate CAS 151-21-3 is a kind of anionic surfactant, belongs to the typical representative of sulfate surfactants, abbreviated as SDS, also called AS, K12, sodium coco sulfate, sodium lauryl sulfate, foaming agent, marketed as Sodium dodecyl sulfate Raw Materials usually white to slightly yellow crystalline powder, non-toxic, slightly soluble in alcohol, insoluble in chloroform, ether, soluble in water, and anionic, nonionic compound compatibility, with good emulsification, foaming, foaming, penetration. Decontamination and dispersion performance, rich foam, fast biodegradation, but the degree of water solubility is inferior to fatty alcohol polyoxyethylene ether sodium sulfate (AES for short).

Sodium dodecyl sulfate CAS 151-21-3 is not sensitive to alkali and hard water, but under acidic conditions, the stability is inferior to general sulfonate, close to AES, long-term heating should not exceed 95 ℃, irritation in the surfactant belongs to the middle level, 10% solution irritation index 3.3, higher than AES, lower than sodium dodecylbenzene sulfonate (referred to as LAS).

Toxicity LD50 is 1300mg/kg, there is no evidence of carcinogenicity, high dose may irritate the skin, but the concentration of Sodium dodecyl sulfate Powder as a foaming agent is limited in general bathroom products, and it is in accordance with the norms of the countries in the world, so you do not need to worry about it. Sodium dodecyl sulfate CAS 151-21-3 is the main ingredient of detergent. It is commonly used in the DNA extraction process to separate proteins from DNA after denaturation. It is often misread as sodium dodecyl sulfate.Sodium dodecyl sulfate CAS 151-21-3 is widely used as a foaming agent in toothpaste, soap, bath soap, shampoo, laundry detergent, as well as cosmetics.95% of personal skin care products and household cleaning products contain Sodium dodecyl sulfate Raw Sodium dodecyl sulfate Raw Materials.

Applications / Functions of Sodium dodecyl sulfate Powder

Sodium dodecyl sulfate Raw Materials has excellent detergency, emulsification and foaming power, and can be used as detergents and textile auxiliaries, but also used as anionic surface activator, toothpaste foaming agent, mine fire extinguishing agent, fire extinguisher foaming agent, emulsion polymerization emulsifier, emulsifying and dispersing agent for pharmaceuticals, shampoo and other cosmetic products, wool purifying detergents, fine silk and wool fabric detergents. Detergents for fabrics. Flotation agent for metal ore dressing.

GB 2760-96 stipulates that Sodium dodecyl sulfate Raw Materials is a processing aid for food industry. Foaming agent; emulsifier; anionic surfactant. Used in cakes, beverages, protein, fresh fruit, juice drinks, edible oils and so on.

• 1, Surfactant, decontamination, foaming, wetting agent, etc.
• 2, relatively low-level ion-pairing reagent, when the requirements are not high, cheaper than heptane, sodium pentanesulfonate
• 3、Sodium dodecyl sulfate powder as raw material, material modification.
• 4, Capillary electrophoresis analysis, additives, generally used as a molar solution.
• 5, Other analytical methods will also be used, such as mobile column analysis.

Sodium dodecyl sulfate Powder is used as washing and textile auxiliaries, also used as toothpaste foaming agent, fire-fighting foam, emulsion polymerization emulsifier, emulsifying and dispersing agent for pharmaceuticals, shampoo and other cosmetic products, wool detergent.

Sodium dodecyl sulfate CAS 151-21-3 Biochemical analysis, electrophoresis, ion-pairing reagent

Sodium dodecyl sulfate Powder properties and stability

Sodium dodecyl sulfate CAS 151-21-3 White to slightly yellow powder, slightly special odor. Soluble in water.

Production method of Sodium dodecyl sulfate Powder

• Sodium dodecyl sulfate Powder is made from dodecanol and chlorosulfonic acid by sulfation to form lauryl sulfate at 40~50℃, neutralized with sodium hydroxide, then bleached, settled and spray-dried.
• Dodecanol and chlorosulfonic acid are fed according to the molar ratio of 1:1.03, the sulfonation reaction is carried out at 30-35℃, the sulfonate ester generated is neutralized with 30% sodium hydroxide to produce sodium dodecanol sulfate, and the finished product is obtained by bleaching with hydrogen peroxide and spray drying. Raw material consumption (kg/t) lauryl alcohol (C12>85%) 725 solid base (NaOH>95%) 183 chlorosulfonic acid (>95%) 458
• There are many methods of sodium dodecyl sulfate preparation, and the following two are most commonly used at present. Sulfur trioxide method The reaction unit is a vertical reactor. Nitrogen was introduced into the reactor at 32°C through a gas nozzle. The flow rate of nitrogen is 85.9L-min-1. Lauryl alcohol is passed into the reactor at 82.7kPa with a flow rate of 58g-min-1. Liquid sulfur trioxide is passed into the flash evaporator at 124.1kPa, and the flash evaporation temperature is maintained at 100°C, and the flow rate of sulfur trioxide is controlled at 0.9072kg-h-1. The sulfated product is then quickly quenched at 50°C, and then pumped into the ager for 10 to 20min. Finally, the product was put into the neutralization kettle and neutralized with alkali. Neutralization temperature is controlled at 50 ℃, when the pH value of 7 ~ 8.5 when discharged, that is, the liquid finished product. Spray drying to get solid products. Chlorosulfonation method intermittent method of lauryl alcohol into the reaction kettle, preheating to 30 ℃. Then under high-speed stirring, 0.03 mol of chlorosulfonic acid was sprayed into the alcohol in the form of mist than the theoretical amount of excess. The reaction temperature was controlled at 30-35°C. After the sulfation reaction, it was beaten into the neutralization kettle and neutralized with 30% lye to pH 7 to 8.5. Finally, it was bleached with 0.4% (by mass) hydrogen peroxide. Spray dry to get solid. It can also be prepared as solution according to the quality standard. The continuous method reaction device is a tube reactor. Lauryl alcohol is first saturated with hydrogen chloride. Lauryl alcohol at a flow rate of 334 g-min-1 and hydrogen chloride at a flow rate of 40.5 g-min-1 pass through a meter into the saturation chamber. The HCl solution of lauryl alcohol was then passed into the reactor at 21.4°C to react with chlorosulfonic acid. The reactants were separated by gas-liquid separation and the sulfated product flowed from the bottom of the separator to the neutralization kettle. The liquid product was neutralized with 30% sodium hydroxide at 50 °C. The solid product is spray dried.

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