Sodium Laureth Sulfate

1. Ingredient Overview

1. Common name and identity: Sodium salt of sulfated ethoxylated lauryl alcohol
2. Ingredient category: Anionic ether sulfate surfactant
3. Natural or commercial origin: Fatty alcohol plus ethylene oxide; feedstock and ethoxylation route-specific

Plain-language summary: Sodium Laureth Sulfate is supplied as aqueous paste or liquid with defined active matter and ethoxylation level. In cosmetic development it supports cleansing, foaming, wetting, and emulsification with flexible salt thickening. The INCI name alone does not establish active matter, full composition, impurity profile, source claims, or performance in a finished product.

Why Sodium Laureth Sulfate Matters
Ingredient identity, source, grade, concentration basis, documentation, and finished-product behavior must be qualified together. A familiar INCI name alone does not establish equivalence or quality.

2. Functional Benefits

1. Primary functions: Support the ingredient's established cosmetic role in a safe, stable, and appropriately positioned finished product
2. Secondary functions: Improve sensory, structure, delivery, conditioning, protection, or processing where the exact grade and formula support the outcome
3. Cosmetic functions: Cleansing, foaming, wetting, and emulsification with flexible salt thickening
4. Mechanism-based benefits: Its primary roles are cleansing, foaming, wetting, and emulsification with flexible salt thickening. Performance depends on concentration, active basis, pH, water quality, co-ingredients, process, package, storage, consumer use, and the complete formula.

3. Mechanism of Action and Chemistry

Chemical Classification

Sodium salt of sulfated ethoxylated lauryl alcohol. It belongs to the anionic ether sulfate surfactant family. Charge, chain or salt distribution, solubility, ionization, impurities, and physical form govern how it behaves; trade names or broad ingredient families should not be treated as chemically identical.

Skin, Hair, or Formula Interaction

Performance depends on the exact grade, concentration, vehicle, co-ingredients, application area, use pattern, package, and target consumer. Ingredient-level rationale should not be presented as proof of a finished-product outcome.

Stability Considerations

Stability Profile
Control heat, light, oxygen, moisture, metals, contamination, physical state, compatible processing, storage, and packaging as relevant to the exact ingredient and complete formula.

4. Source and Raw Material Origin

1. Raw material source: Commercial material is commonly sourced as follows: Fatty alcohol plus ethylene oxide; feedstock and ethoxylation route-specific. Approve feedstocks, legal manufacturer, production and finishing sites, countries of origin, process aids, full composition, and evidence behind any natural, renewable, palm-free, sulfate-free, or other source claim.
2. Geographic origin: Document feedstock or raw-material origin, intermediate processors, manufacturing and refining sites, finishing or blending sites, distributor chain, and final packaging location.
3. Manufacturing pathway: Feedstock preparation → conversion, extraction, polymerization, refining, or fractionation → purification and finishing → testing → controlled packaging.
4. Renewability: Evaluate feedstocks, land or mineral use where relevant, water, energy, solvents or reagents, emissions, waste, transport, certification scope, and chain of custody. Origin alone does not prove sustainability.

Sourcing Transparency
Approve the exact identity, legal manufacturer, production sites, complete composition, source chain, processing method, and change-notification terms—not only a distributor's product name.

5. Manufacturing and Processing

1. Production method: A fatty alcohol is ethoxylated, sulfated, neutralized, and purified. Ethoxylation level, homolog distribution, salt, and residual 1,4-dioxane shape quality and performance. Release should reconcile the specification, certificate, test methods, lot, site, manufacture date, retest date, and change-notification terms.
2. Standardization: Confirm identity, composition or assay basis, physical properties, impurities, contaminants, microbiology where relevant, and stability requirements.
3. Quality control: Identity / purity / composition / physical properties / contaminants / residual materials / microbiology where relevant / sensory quality / stability
4. Consistency considerations: Feedstock, route, process controls, purification, finishing, physical form, packaging, transport, and storage can change lot performance.

Quality Control Steps

• Confirm identity with methods capable of distinguishing the claimed grade, composition, source, or material family.
• Reconcile the specification, certificate of analysis, test methods, lot, legal manufacturer, site, and expiry or retest date.
• Review impurities, contaminants, adulterants, residual processing materials, and microbiology using a source- and process-specific risk assessment.
• Verify physical and sensory properties on the same basis used for formulation, manufacturing, and claims.
• Require stability, storage, transport, opened-container, change-notification, complaint, recall, and continuity information.

6. Safety, Toxicology, and Regulatory Status

Cosmetic Regulatory Status

CIR assessments support use when formulated to be non-irritating. Eye and skin irritation remain formulation-dependent, and ethoxylation by-products require appropriate manufacturing controls. Confirm current ingredient status, limits, exposure, labeling, claims, and safety requirements in each market before launch.

In the United States, cosmetics must be safe under labeled or customary conditions of use and properly labeled. Drug claims or use as an OTC active require the applicable drug pathway. In the European Union, assess the complete formula under current cosmetics and, where relevant, REACH requirements.

Before launch, confirm ingredient status, concentration, exposure, claims, warnings, labeling, safety assessment, and regulatory requirements for each target market.

Safety Profile

• Evaluate safety for the exact grade, concentration, exposure area, use pattern, population, and complete formula.
• Review impurities, contaminants, allergens, inhalation or mucosal exposure, interactions, and vulnerable users where relevant.
• Avoid disease-treatment claims, absolute promises, and conclusions that exceed the supporting evidence.
• Maintain lot traceability, complaint handling, adverse-event procedures, and current market-specific regulatory documentation.

Regulatory Compliance Considerations
Ingredient permission, concentration, exposure, claims, labeling, purity, and manufacturing controls must be reviewed together for each target market.

7. Clinical Studies and Scientific Evidence

Evidence Summary

Evidence supports its established function in cosmetic formulas, but supplier or literature results may use different grades, levels, vehicles, contact times, organisms, endpoints, or comparators. Finished-product claims should be demonstrated on the marketed formula.

Study Types and Endpoints

• Analytical and laboratory studies: Identity, composition, stability, compatibility, physical behavior, and plausible cosmetic function
• Human cosmetic studies: Hydration, softness, smoothness, barrier-related measures, sensory, tolerability, hair performance, or color-cosmetic endpoints as relevant
• Finished-product studies: Exact grade, concentration, vehicle, application area, directions, target population, package, and shelf-life performance

Limitations

Published studies may use different grades, concentrations, vehicles, combinations, populations, endpoints, or supplier-funded materials. Results should not be transferred without confirming identity, composition, exposure, formula, and evidence relevance.

Clinical Evidence at a Glance
Claims should match the exact ingredient grade, concentration, finished formula, target population, study duration, application pattern, and measured endpoint.

8. Formulation and Application Guidance

Define the as-supplied and active basis before batching. Control order of addition, temperature, shear, pH, electrolytes, water quality, hold times, and package exposure. Validate appearance, odor, viscosity, stability, microbial quality, performance, and tolerability through shelf life.

Typical Use Levels

Set the level from the exact grade, intended function, finished-product safety assessment, sensory target, processing behavior, evidence, and applicable market rules.

Compatibility

Compatibility is formula-specific. Evaluate polarity, solubility or dispersion, emulsifier and rheology systems, heat and shear, pH where relevant, preservation, oxidation, sensory, and package interactions.

Formulation Challenges and Solutions

Delivery Systems

1. Liquid systems: Balance active matter, pH, electrolytes, viscosity, preservation, and package dispensing.
2. Concentrated or solid formats: Control dust or handling, dissolution, heat, shear, and uniformity.
3. Sensitive-use products: Validate eye and skin tolerability, contact time, rinse behavior, and consumer directions.

Formulator's Note
Use the supplier's grade-specific process limits as a starting point, then verify identity, composition, appearance, sensory profile, physical stability, microbiology where relevant, preservative efficacy, package compatibility, and claims throughout finished-product shelf life.

9. Products and Applications

Common Product Types

Shampoos, body washes, hand cleansers, facial cleansers, bubble baths, and household-style personal-cleansing products.

Target Consumers

Brands building rinse-off products where cleansing, foam, mildness, sensory, and manufacturing consistency must be balanced.

Positioning

Specify active matter and ethoxylation profile. Do not call it sulfate-free or ignore 1,4-dioxane control.

Real-World Product Examples
Select the format and level by ingredient behavior, target consumer, sensory expectations, manufacturing capability, safety assessment, claims, target market, and shelf-life requirements.

10. Supply Chain, Sustainability, and Quality Considerations

Supply Chain Characteristics

1. Supply risks: Key risks include incorrect active-basis calculations, undisclosed blends, variable feedstocks, impurity drift, off-color or odor, incomplete manufacturer traceability, mismatched certificates, and unsupported marketing claims.
2. Continuity: Review feedstock availability, manufacturing capacity, quality holds, logistics, regulatory transitions, and qualified backup options.
3. Lead times and price: Grade, purity, testing, documentation, packaging, order volume, certification, and regulatory support affect commercial terms.

Sustainability

• Request source- and site-specific information on feedstocks, water, energy, solvents or reagents, waste, emissions, and packaging.
• Verify environmental and social certifications, issuing bodies, validity, custody model, and exact facility and product scope.
• Do not treat plant, mineral, petroleum, synthetic, or silicone origin as automatic proof of environmental benefit or harm.

Adulteration and Quality Risks

1. Risk level: Higher when identity, composition, manufacturing site, source claims, or certificate traceability are unclear
2. Common issues: Substitution, dilution, undisclosed blends or carriers, incorrect assay or composition basis, contamination, specification drift, and unsupported origin or certification claims
3. Detection methods: Orthogonal identity and composition testing, impurity and contaminant review, physical and sensory checks, document reconciliation, retained-sample comparison, and lot traceability

Supplier Evaluation Checklist

• Exact identity, source, grade, composition, and functional basis
• Legal manufacturer, production and finishing sites, countries of origin, and distributor chain
• Current specification, methods, and representative certificates of analysis
• Impurity, contaminant, adulteration, allergen, residual-material, and microbiological controls where relevant
• Stability, storage, transport, shelf-life, packaging, and opened-container requirements
• Evidence matching the exact grade, concentration, target use, and proposed claims
• Regulatory, sustainability, origin, certification, and social-impact documentation covering the exact supply chain
• Change notification, complaint handling, recall readiness, audit status, and business continuity

Quality Markers

• Confirmed identity, source, legal manufacturer, production site, grade, lot, and document traceability
• Composition or functional property tested on the same basis used in formulation and supplier approval
• Controlled impurities, contaminants, adulterants, residual processing materials, and microbiology where relevant
• Consistent physical, sensory, and processing performance
• Finished-product stability in the intended packaging and distribution pathway
• Change-notification, complaint, recall, and business-continuity controls

11. How Does Sodium Laureth Sulfate Compare to Related Ingredients?

Selection Considerations
Choose the grade by target consumer, intended cosmetic function, sensory needs, safety, regulatory path, analytical capability, source evidence, manufacturing requirements, and supply continuity—not by marketing familiarity alone.