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Sodium Lauryl Sulfate, Monododecyl Sodium Sulfate, Sodium Monolauryl Sulfate, Sodium Dodecyl Sulfate, Sodium Dodecane Sulfate, SDS, SLS, 151-21-3, 12765-21-8, 12738-53-3 ,1334-67-4

Sodium Lauryl Sulfate, Monododecyl Sodium Sulfate, Sodium Monolauryl Sulfate, Sodium Dodecyl Sulfate, Sodium Dodecane Sulfate, SDS, SLS, 151-21-3, 12765-21-8, 12738-53-3 ,1334-67-4

Product Name: Sodium Dodecyl Sulfate (SLS) Powder

1. CHEMICAL IDENTIFICATION

Property Value
Chemical Name Sodium dodecyl sulfate
Synonyms Sodium lauryl sulfate, Dodecyl sulfate sodium salt, Lauryl sodium sulfate, Monododecyl sodium sulfate, Lauryl sulfuric acid sodium salt, SLS
CAS Number 151-21-3
Molecular Formula C₁₂H₂₅O₄SNa
Molecular Weight 288.38 g/mol
Structural Description Anionic surfactant of organic origin, derived from coconut kernel or palm kernel oil. It belongs to the alcohol sulfate family and is a primary alkyl sulfate that can be composed of a mixture of sodium alkyl sulfate and lauryl components.

2. PHYSICAL AND CHEMICAL PROPERTIES

Property Value / Description
Physical Appearance White powder or slightly yellowish crystalline solid
Odor Slight characteristic odor
Melting Point 205.5 °C
Density ~1.6 g/cm³
Solubility (20 °C) ~15 g / 100 ml water (moderately soluble)
pH (1% solution) Typically 7 – 10 (depending on product specification)
Stability Stable under normal conditions
Surface Activity Effectively reduces surface tension; excellent foaming, wetting and emulsifying ability

3. TYPICAL APPLICATIONS

  • Personal Care & Cosmetics: Primary surfactant in products such as shampoos, toothpastes and shaving foams.

  • Detergents & Cleaning Products: Acts as an emulsifying, wetting and foaming agent; used to reduce surface tension in formulations containing LABSA.

  • Leather Industry: Leather softening agent.

  • Paper Industry: Penetrating (wetting) agent.

  • Textile Industry: Wetting agent.

  • Metal & Mining: Flotation chemical in metal extraction and refining; additive in nickel and zinc electroplating baths.

  • Paints & Varnishes: Used in the manufacture of paint and varnish strippers.

  • Laboratory Applications: Electrophoretic separation (especially important in lipid analysis).

4. PACKAGING AND STORAGE

  • Packaging: 25 kg kraft bags with PE liner, or big bags according to customer request.

  • Storage Conditions: Store in a cool, dry, well-ventilated area away from direct sunlight and moisture. Keep container tightly closed in the original packaging.

  • Shelf Life: At least 24 months from the date of production under proper storage conditions.

5. SAFETY AND HANDLING PRECAUTIONS

  • When handling the powder form, use adequate ventilation and a dust mask to avoid inhalation of dust.

  • Avoid contact with skin and eyes; wear protective gloves and safety goggles.

  • For detailed information, refer to the Safety Data Sheet (SDS).

6. REFERENCE COMMERCIAL PRODUCTS (BASF)

Below are some commercial BASF products with similar alcohol sulfate chemistry, provided for information. The closest match for SLS powder is Agnique® SLS 90 P.

Trade Name Chemical Description Form Active Content (approx.)
Agnique® SLS 90 P Sodium dodecyl sulfate (C12) Powder ~100%
Disponil® SDS 15 EVO Sodium lauryl sulfate (C12) Liquid ~15%
Disponil® SDS 30 EVO Sodium lauryl sulfate (C12) Liquid ~30%
Disponil® SDS G Sodium lauryl sulfate (C12) Solid (granules) ~97%
Disponil® SLS 101 Spec EVO Sodium C12-C16 alkyl sulfate Liquid ~30%

Disclaimer: This technical data sheet has been prepared for general information purposes based on available knowledge and data. For exact specifications and confirmation of suitability, the manufacturer's original documentation should be consulted.

SODIUM DODECYL SULFATE (SLS) POWDER

APPLICATION RECIPES, FREQUENTLY ASKED QUESTIONS, ALTERNATIVES, OTHER NAMES, SECTORAL APPLICATION TABLE AND COMPARISONS

1. APPLICATION RECIPES

These recipes are typical starting-point formulations. Usage rates can be optimized based on final product performance targets. All percentages are by weight (% w/w).

A. Liquid Shampoo (Clear, Sulfate-Based)

Ingredient Function Rate (%)
Water (Deionized) Solvent q.s. (approx. 50-55%)
SLS Powder (e.g., Agnique® SLS 90 P) Primary surfactant, foaming, cleansing 8 – 12
Cocamidopropyl Betaine (CAPB) Co-surfactant, foam booster, mildness 3 – 5
Coconut Fatty Acid Diethanolamide (CDEA) Thickener, foam stabilizer 1 – 2
Sodium Chloride (Salt) Viscosity modifier 0.5 – 1.5
Preservative (e.g., Sodium Benzoate) Preservation 0.5
Citric Acid pH adjuster (pH 5.5 – 6.5) q.s.
Fragrance & Dye Aesthetics q.s.

*Note: SLS powder is added slowly to the water phase and stirred until completely dissolved. A warm process (40-50°C) accelerates dissolution.*

B. Toothpaste (Opaque, Fluoride)

Ingredient Function Rate (%)
Sorbitol (70% solution) Humectant, sweetener 25 – 35
Water (Deionized) Solvent 15 – 20
Hydrated Silica Abrasive, thickener 18 – 22
SLS Powder Foaming agent, surfactant 1.5 – 2.0
Xanthan Gum / Carbomer Binder, stabilizer 0.5 – 1.2
Sodium Saccharin Sweetener 0.2 – 0.3
Sodium Fluoride Active (anti-cavity) 0.32
Titanium Dioxide Opacifier 0.5 – 1.0
Flavoring Mint etc. 1 – 1.5
Sodium Benzoate Preservative 0.2

Note: SLS is critical for foaming performance, but for those with oral mucosa sensitivity, alternative sulfate-free formulations (e.g., sodium cocoyl glutamate) may be considered.

C. Powder Laundry Detergent

Ingredient Function Rate (%)
Soda Ash (Sodium Carbonate) Builder, water softener 30 – 40
Sodium Percarbonate / Perborate Bleaching agent 10 – 15
LABSA (Linear Alkyl Benzene Sulfonic Acid) – neutralized with soda ash Primary anionic surfactant 10 – 15
SLS Powder Co-surfactant, quick foam, wetting 3 – 7
Sodium Silicate Corrosion inhibitor, powder structurant 5 – 8
Filler (Sodium Sulfate) Filler q.s. to 100%
Carboxymethyl Cellulose (CMC) Anti-redeposition agent 1 – 2
Optical Brightener, Enzyme, Fragrance Performance/Aesthetics q.s.

Note: In LABSA-based powder detergents, SLS reduces surface tension, especially boosting wetting and foaming speed in cold water.

D. Liquid Hand Soap

Ingredient Function Rate (%)
Water Solvent q.s. (~70%)
SLS Powder Primary cleanser, foaming 5 – 8
Cocamidopropyl Betaine Mildness, foam 3 – 5
Glycerin Humectant 1 – 2
Salt Viscosity 0.5 – 2
Preservative, Fragrance, pH adjuster   q.s.

2. FREQUENTLY ASKED QUESTIONS (FAQ)

Q1: Is SLS an organic product?
No, it is a chemical compound. However, its raw material is of natural origin. SLS is produced by sulfation of lauryl alcohol derived from coconut kernel or palm kernel oil. Therefore, it is classified as a plant-based or naturally derived surfactant.

Q2: What is the difference between SLS and Sodium Lauryl Ether Sulfate (SLES)?
SLS is a non-ethoxylated alcohol sulfate (1 mol fatty alcohol : 1 mol sulfate). SLES is produced by reacting the alcohol with ethylene oxide (ethoxylation) prior to sulfation.

  • SLS: Stronger cleaning, more foam, can be slightly harsher on skin. Stable at low pH.

  • SLES: Better performance in hard water, less skin irritation, milder feel. Stable at high pH.

Q3: Does SLS cause irritation?
Like all anionic surfactants, at high concentrations and prolonged contact there is potential for skin and eye irritation. However, when combined with co-surfactants (e.g., coco betaine) in a formulation, the irritation potential is significantly reduced. In toothpaste, it is used at safe, accepted levels of around 2%.

Q4: Can SLS powder be dissolved in water without heating?
The dissolution rate is slow. At 20°C it has a solubility of 15 g/100 mL. In cold water it may form lumps (fish eyes). Therefore it should be sprinkled slowly into the water phase with rapid agitation, and gentle heating to 40-50°C is the best practice to prevent lumping.

Q5: What is the role of salt in SLS-containing formulations and how much should be used?
Sodium chloride (table salt) increases ionic strength, changes the shape of SLS micelles, and substantially increases the viscosity of the liquid. Typical usage is 0.5% - 2%. Too much salt lowers the viscosity. The optimum point should be found by adding gradually for each batch.

3. OTHER NAMES AND SYNONYMS

SLS powder may be referred to by the following names in different industries and languages. (Note: All refer chemically to the same compound.)

Name Context of Use
Sodium Lauryl Sulfate Most common international name
SLS General abbreviation
Sodium Dodecyl Sulfate Systematic chemical name
Lauryl Sulfate Sodium Salt Name emphasizing the salt form
Dodecyl Sulfate Sodium Salt Alternative systematic name
Lauryl Sulfuric Acid Sodium Salt Indicates it is the salt of the acid form
Monododecyl Sodium Sulfate Specifies the mono-alkyl chain
Agnique® SLS 90 P BASF trade name (Powder, ~100% active)
Disponil® SDS G BASF trade name (Granules, ~97% active)
Texapon® K 12 P Another common trade name (BASF/previous nomenclature)

4. SECTORAL APPLICATION TABLE

The table below summarizes the functional uses of SLS powder by industry, along with typical dosage ranges.

Industry Main Function Specific Application Example Typical Dosage (% w/w)
Personal Care & Cosmetics Surfactant, Foaming, Cleansing Shampoo, liquid soap, toothpaste, shaving cream, bubble bath 1 – 15
Household & Industrial Cleaning Wetting, Emulsifying, Foam stabilizer Powder detergent, liquid dish soap, all-purpose cleaner, surface tension reducer in LABSA formulations 1 – 15
Textile Wetting agent, Penetrant, Post-wash softening Desizing of raw fabric, pre-dye wetting, wool washing, finishing 0.5 – 3 (depending on bath)
Leather Softener, Rewetting aid Soft leather processing baths, post-pickling wetting 0.5 – 2
Paper Penetrating agent Added to pulp to increase absorbency 0.2 – 1
Metallurgy & Mining Flotation chemical, Brightener Separation of precious metal ores (flotation); surface tension reducer and brightener in nickel and zinc electroplating baths 0.1 – 2
Paint & Varnish Paint stripper surfactant, Wetting Enhancing penetration in varnish and paint remover formulations 1 – 5
Laboratory & Biotechnology Protein denaturation, Lysing agent SDS-PAGE electrophoresis, lipid separation and cell lysis buffers 0.1 – 10 (buffer dependent)

5. ALTERNATIVES AND COMPARISON

This section serves as a guide for formulators wanting to switch to a milder or different surfactant profile.

Comparison Criterion SLS (Sodium Lauryl Sulfate) SLES (Sodium Lauryl Ether Sulfate) Sodium Cocoyl Isethionate (SCI) Sodium Cocoyl Glutamate (SCG)
Origin Coconut/palm (sulfated) Coconut/palm (ethoxylated + sulfated) Coconut oil + isethionic acid Coconut oil + glutamic acid
Chemical Family Alkyl Sulfate Alkyl Ether Sulfate Alkyl Sulfonate / Acyl Isethionate Acyl Amino Acid Salt
Form Powder, granule, needle Usually liquid (28-70% active), paste Powder, flake, noodle Usually liquid (25-30%)
Sensitivity to Hardness Sensitive to hard water (calcium salt precipitates) Hard-water tolerant Hard-water tolerant Hard-water tolerant
Skin Mildness Moderate-High (alone) Low-Moderate Very Low Very Low
Foam Profile Abundant, rapid, large bubbles Rich, creamy, dense Dense, creamy, silky Creamy, fine, stable
Irritation Potential Relatively high Low Very low Very low
pH Tolerance Broad, stable at acidic pH (sulfate-free types may hydrolyze at acidic pH) Broad, stable at alkaline pH Best at slightly acidic-neutral (pH 5-7) Best at slightly acidic-neutral (pH 5-7)
Price Index (Relative) 1.0 (Reference) 1.2 – 1.5 3.0 – 4.0 5.0 – 7.0
Main Application Area Economy shampoo, toothpaste, industrial cleaning, detergent Liquid soap, shower gel, baby shampoo (market standard) "Sulfate-free" solid shampoos, facial cleansers, luxury/green cosmetics Premium sulfate-free liquid products, baby, sensitive skin formulations

6. COMPARISON TABLE: DIFFERENT SLS GRADES (BASF EXAMPLE)

SLS is offered in different physical forms and active matter concentrations. The table below helps the formulator choose the correct physical form.

Property Agnique® SLS 90 P Disponil® SDS 15 EVO Disponil® SDS 30 EVO Disponil® SDS G Disponil® SLS 101 Spec EVO
Physical Form (20°C) Powder Liquid (free-flowing) Liquid (viscous) Solid (Granules/Needles) Liquid (medium viscosity)
Active Content (%) ~100 ~15 ~30 ~97 ~30
Alkyl Chain Distribution Mainly C12 (Lauryl) C12 C12 C12 C12-C16 blend
Ease of Use in Production Moderate (requires powder dissolution, energy cost) Very Easy (cold process) Easy (pumpable, cold process) Moderate-Easy (easily dissolved with low energy) Easy
Storage / Transport Cheap, non-perishable Expensive (water shipped), freezing risk More economical Cheap, compact More economical
Formulation Suitability Powder shampoo, toothpaste, dry detergent, electrophoresis Ready-to-use liquid soap, clear products, ambient temperature processing Liquid shampoo, bubble bath, concentrated cleaners Compact detergent, solid cosmetics, automated processes Low-cost liquid cleaning, industrial detergents

Disclaimer: The information provided is based on our current knowledge and does not constitute a binding guarantee of product properties. Buyers should determine the suitability of the product for their specific intended use through their own testing. For regulatory compliance and safety precautions, please refer to the product's current Safety Data Sheet (SDS) and official manufacturer documentation.

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