Anhui Eapearl Chemical | Sodium Lauryl Sulfate (K12 / SDS / SLS) Surfactant Series

Anhui Eapearl Chemical Co., Ltd. is a professional R&D and supplier of surfactants for surface cleaning and daily chemical industries. It owns complete synthetic production systems and cross-regional warehousing networks, implements independent quality control over all anionic surfactants, and provides integrated raw material solutions with graded specifications and formulation technical support.

I. Standard Chemical Dossier of Product

1. Basic Identification Information

Standard Chinese Name: Sodium Lauryl Sulfate

Common Abbreviation: K12, SDS, SLS

Full English Name: Sodium Dodecyl Sulfate / Sodium Lauryl Sulfate

INCI Name: Sodium Lauryl Sulfate

CAS No.: 151-21-3

EINECS No.: 205-788-1

General Molecular Formula: CH3(CH2)11OSO3Na

Molecular Weight: 288.38

Synthesis Process: C12 primary alcohol undergoes sulfur trioxide sulfonation followed by neutralization with sodium hydroxide and refining. Supported by integrated sulfonation and refining facilities, the product precisely controls impurities including unsulfated alcohol and heavy metals, and is divided into industrial grade and toothpaste grade.

Applicable Standards:

1.National General Standard: GB/T 15963-2022 Sodium Lauryl Sulfate

2.Toothpaste-Specific Standard: QB/T 2900-2012 Oral Care Products — Sodium Lauryl Sulfate for Toothpaste

3.Overseas Pharmacopoeia: USP-NF, European Pharmacopoeia (EP)

4.Export Compliance: EU REACH Regulation, GHS Global Hazard Classification System

Two Standard Commercial Grades (Uniform Test Conditions: 25℃, RH50)

5.K12 Solid Powder: 94~96% active matter, white to pale yellow acicular powder, packed in 20~25kg lined composite woven bags

6.K12 Aqueous Solution: 28~30% active matter, colorless to pale yellow homogeneous transparent liquid, packed in 160kg anti-corrosion plastic drums

2. Graded Internal Control Physicochemical Indexes

Test Item	Premium Grade Limit of GB/T 15963-2022	Eapearl General Industrial Grade	Eapearl Toothpaste Grade	Standard Test Method
Active Matter Content	≥94.0 %	94~95 %	95~96 %	Two-Phase Potentiometric Titration (GB/T 5173)
Unsulfated Primary Alcohol	≤1.5 %	≤1.4 %	≤1.0 %	Neutral Oil Gravimetric Extraction
Inorganic Salts (Sodium Sulfate + Sodium Chloride)	≤5.0 %	≤4.8 %	≤2.5 %	Ion Chromatography Quantitative Analysis
Hazen Color of 5% Aqueous Solution	≤60	≤55	≤30	GB/T 3143 Spectrophotometry
pH of 1% Aqueous Solution	7.5~9.5	7.8~9.2	7.6~8.6	Potentiometric Titration
Foam Height (0.25% active, deionized water, 25℃)	≥180mm	≥180mm	≥190mm	Ross-Miles Foam Tester
28-Day Biodegradability (OECD 301B)	≥92 %	≥92 %	≥94 %	Closed-Bottle CO₂ Evolution Test
Heavy Metals (Pb / As / Cd)	No mandatory limit	General safety threshold	Pb ≤1ppm, As ≤1ppm	Atomic Absorption Spectrometry
Draize Irritation Test	Moderate degreasing irritation	Moderate degreasing irritation	Controllable low irritation (adjustable via compounding)	Cosmetic Toxicity Evaluation Specification

II. Molecular Interfacial Chemistry & Compatibility Restrictions

2.1 Fundamental Molecular Mechanism of K12 (SDS)

As a matching raw material in the full surfactant portfolio, K12 is an anionic sodium alkyl sulfate with linear primary alkyl structure, featuring a typical amphiphilic structure consisting of hydrophobic long C12 alkyl chain and hydrophilic sodium sulfate head group.

1.Interfacial Activity Mechanism: Extremely low Critical Micelle Concentration (CMC). It rapidly reduces static and dynamic surface tension of aqueous systems. Hydrophobic alkyl segments penetrate grease efficiently, while sulfate hydrophilic groups encapsulate contaminants to form stable oil-in-water micelles, delivering powerful emulsification, high foaming and deep degreasing performance simultaneously.

2.Foam Characteristics: Fast foaming speed, large foam volume and rigid foam framework, ranking among the most efficient commercial foaming surfactants. The downside is pure K12 foam tends to collapse over time; compounding with AES/AESA is required to improve foam stability.

3.Performance Limitations: No EO hydrophilic segments in the molecule, resulting in poor tolerance to calcium and magnesium ions and easy precipitation of calcium alkyl sulfate in hard water. Its long alkyl chain provides strong degreasing power; prolonged high-concentration contact disrupts skin lipid bilayers, leading to higher irritation than AES, AESA and LSA.

4.Chemical Stability Window: Stable at pH 6.5~10. Ester bonds undergo irreversible hydrolysis under strong acidic conditions, and discoloration plus foaming attenuation occurs after long-term high-temperature storage.

2.2 Mandatory Compatibility Specifications

1.Compatible Systems: Anionic surfactants (LABSA / AOS / AES), nonionic surfactants (APG, fatty alcohol ethers) and amphoteric betaines can be blended at any ratio, bringing improved foam durability and mildness.

2.Strict Incompatibility: Direct high-proportion mixing with cationic surfactants (quaternary ammonium salts etc.) generates insoluble double salts, completely eliminating foaming and emulsifying capacity.

3.Formulation Optimization: Compound K12 with AESA/CAB for toothpaste and mother-infant cleansing formulas to reduce degreasing irritation and balance foaming and skin feel. A small amount of disodium EDTA chelating agent can be added to suppress lime soap precipitation under hard water conditions.

2.3 Core Performance Comparison with Peer Surfactants

Performance Dimension	K12 SDS	AES Sodium Salt	AESA Ammonium Salt	LSA Ammonium Salt
Foaming Capacity	Extremely high (maximum foam volume)	Medium	Fine & creamy	Fine, low volume
Degreasing Irritation	Relatively high	Low	Extremely low	Moderately low
Hard Water Resistance	Poor (precipitation below 150ppm CaCO₃)	Excellent	Excellent	General
Foam Durability	Prone to collapse	Long-lasting stable foam	Long-lasting stable foam	Fast foam decay
Main Application Fields	Toothpaste, industrial foaming, biochemical reagents	Household laundry detergent	Transparent infant cleansing products	Weak-acid foam bath products

III. Standard Application Scenarios & Dosing Guidelines

3.1 Core Field: Oral Care

Toothpaste-grade K12 compliant with QB/T 2900-2012 Standard dosage: 1.0~2.5% Function: Generate abundant foam rapidly and disperse abrasives, flavors and humectants. Process Tip: Adopt low-salt toothpaste-grade K12 to avoid paste separation, water bleeding and discoloration during shelf life.

3.2 Pharmaceutical Excipients

1.Wetting and dispersing agent for oral tablets and suppositories: 0.5~1.2%, enhances powder wetting and tablet disintegration.

2.Carrier auxiliary for dry powder inhalants.

3.Penetration booster for topical creams; low dosage is required to mitigate skin irritation.

3.3 Fine Industrial Chemicals

1.Emulsifier for emulsion polymerization (styrene-butadiene latex, acrylic emulsion): 0.3~1.0%, stabilizes latex particles.

2.Textile scouring agent and wool degreaser.

3.Degreaser for electroplating and ambient metal cleaning.

4.Wetting & foaming additive for pesticide EC and wettable powders.

6.Primary foaming raw material for water-based fire foam extinguishing agents.

3.4 Biochemical Laboratory Use

SDS-PAGE electrophoresis, cell lysis buffer and protein denaturant. High-purity low-impurity grades are available for research laboratories.

3.5 Household Detergent Auxiliary

Foaming co-agent for laundry powder and heavy-duty liquid detergent. Not recommended for standalone use on facial and infant cleansing due to strong degreasing irritation. Standard dosage: 2~6%, compound with AES to optimize skin feel.

Standard Production Process Tips

1.Premix solid K12 under low temperature; system temperature shall not exceed 60℃. Long-time high-temperature stirring causes discoloration and reduced foaming performance.

2.Dilute liquid K12 with warm water under low-speed stirring; rapid mixing with cold water easily forms agglomerates.

3.Maintain toothpaste system pH at 7.6~8.6; strong acid environment leads to permanent foaming loss.

IV. One-Stop Supply Advantages of Full Surfactant Portfolio

Anhui Eapearl Chemical Co., Ltd. specializes in supplying full-range surfactants for daily chemical, pharmaceutical and industrial cleaning sectors, enabling one-stop procurement of all anionic detergent raw materials.

1.Permanent stock of full anionic surfactant series Both solid K12 (94~96%) and liquid K12 (28~30%) are in stock, together with supporting AES, AESA, LSA, AOS and LABSA. Daily chemical, pharmaceutical and industrial manufacturers can source all required surfactants from a single supplier, cutting costs on multi-supplier inspection and warehousing. This product was exhibited as a flagship item at the 2026 IES Fine Chemical Exhibition.

2.Two graded lines for segmented markets

·General Industrial Grade: Cost-effective for emulsion polymerization, textile treatment, electroplating and fire foams.

·High-Purity Toothpaste Grade: Low unsulfated alcohol and low heavy metal content, compliant with QB/T 2900 and overseas toothpaste export standards. High-purity lab-grade SDS samples are available upon request.

3.Cross-regional standardized warehousing network Central warehouse in Tongling linked with dedicated chemical warehouses in Nanjing, Shanghai, Hefei and Zibo. Same-day delivery available for Yangtze River Delta orders with permanent K12 inventory to guarantee uninterrupted supply.

4.Complete domestic & export compliance documents Chinese & English COA and 16-section GHS SDS provided per batch. Toothpaste grade attached with USP/EP impurity test data. Products completed REACH pre-registration and pass import audits for Southeast Asia SIRIM, EU, North America and nearly 200 countries globally.

5.Customized professional formulation technical support Dedicated engineers provide standard toothpaste foaming formulas and industrial emulsion compounding schemes to resolve common defects including foam collapse, paste separation, hard water precipitation and system discoloration.

6.Diversified standardized packaging

·Solid K12: 20~25kg lined composite bags

·Liquid K12: 160kg plastic drums, 1000L IBC totes Bulk tank truck delivery available for large-volume orders.

V. Compliance Specifications for Warehousing, Operation & Hazardous Waste

1.Warehouse Conditions: Hermetically sealed cool dry storage at 15~40℃, protected from light. Long-term storage above 60℃ accelerates sulfate ester hydrolysis, leading to irreversible foaming degradation.

2.Storage Segregation: Do not store alongside strong acids or cationic surfactants to avoid precipitation and performance failure.

3.Operation Protection: Wear nitrile chemical-resistant gloves and safety goggles. Inhalation of powder irritates respiratory tracts.

4.Waste Liquid Disposal: Wastewater falls under HW09 oil-water emulsified hazardous waste (Code 900-007-09) as per National Hazardous Waste Catalogue (2021). Disposal must be entrusted to qualified institutions; direct discharge into municipal sewage pipelines is prohibited.

5.Marine Shipment Classification: Classified as irritant organic anionic surfactant, not high-risk dangerous goods. Complete IMDG-compliant English SDS provided for export shipments.

VI. Conclusion

Sodium Lauryl Sulfate (K12/SDS) is a linear alkyl anionic surfactant with outstanding foaming capacity. Its linear C12 sodium sulfate molecular structure delivers superior foaming, emulsification and deep degreasing properties, making it an indispensable core raw material for toothpaste, pharmaceutical excipients, emulsion polymerization and industrial foaming systems. However, its strong degreasing effect and poor hard water tolerance restrict standalone use in premium infant and sensitive skin cleansing; compounding with AESA and amphoteric betaines is required to optimize performance. As a professional supplier of surfactant chemical raw materials, Anhui Eapearl Chemical Co., Ltd. offers a complete portfolio of anionic detergents including K12, AES, AESA, LSA, AOS and LABSA, divided into general industrial grade and high-purity toothpaste grade. Full test certificates complying with national standards, USP and REACH are provided. Stable long-term supply is available for toothpaste factories, pharmaceutical auxiliary manufacturers, industrial chemical enterprises and foreign trade purchasers; product samples can be sent for lab formulation verification.

Corporate Information

Anhui Eapearl Chemical Co., Ltd.

Shanghai Eapearl Industrial Co., Ltd.

Overseas Subsidiary: PT Indonesia Eapearl Chemical

Website: epchems.com

Contact: +86-18656201888 (Whatsapp / Wechat)

E-Mail: sales@epchems.com

Addresses

Anhui Headquarters No.518 Tongguanshu Valley, Tongguan District, Tongling City, Anhui Province, P.R.China

Shanghai Warehouse & Office No.918 Zhenchen Road, Baoshan Urban Industrial Park, Baoshan District, Shanghai, P.R.China

Indonesian Overseas Subsidiary Unit L9-02, 9th Floor, One Belpark Office Tower, Jalan RS. Fatmawati No.1, Pondok Labu, Cilandak, South Jakarta Administrative City, Republic of Indonesia