Procurement Report: Sodium 2-(2-ethoxyethoxy)ethanesulfonate (CAS: 109-33-3)

Product Category: Industrial Surfactant / Ionic Liquid / Electrolyte Additive Chemical Identity: Sodium 2-(2-ethoxyethoxy)ethanesulfonate (often abbreviated as Na-DEG-SO3 or referred to by the structural formula provided). Primary Function: Anionic surfactant, wetting agent, and electrolyte additive for lithium-ion batteries and industrial cleaning.

---

1. Technical Specifications and Performance Metrics

The procurement of Sodium 2-(2-ethoxyethoxy)ethanesulfonate requires strict adherence to purity and physical property standards to ensure compatibility with high-performance applications, particularly in battery electrolytes and advanced surfactant formulations.

• Purity: Typical B2B range is 98.0% – 99.5% (HPLC or Titration). For battery-grade applications, purity often exceeds 99.0% with strict limits on heavy metals.
• Appearance: Clear to slightly yellowish viscous liquid or hygroscopic solid (depending on hydration state).
• Melting Point: Typically 15°C – 25°C (often handled as a liquid at ambient temperature).
• Water Content: Critical for battery applications; target range < 0.1% – 0.5% (Karl Fischer titration).
• Ash Content: < 0.1% – 0.5%.
• pH Value (1% Aqueous Solution): 6.0 – 8.0 (Mildly alkaline to neutral).
• Viscosity: 50 – 200 mPa·s at 25°C (Highly dependent on temperature and concentration).
• Surface Tension: 25 – 35 mN/m at 1% concentration in water.
• Solubility: Fully miscible in water, alcohols, and polar organic solvents.

Actionable Recommendation: Procurement specifications must explicitly define the Water Content limit. If the application involves Lithium-ion battery electrolytes, demand a COA (Certificate of Analysis) with specific heavy metal limits (e.g., Pb < 10 ppm, As < 5 ppm) rather than general purity claims. Verify the physical state (liquid vs. solid) based on your storage temperature capabilities.

---

2. Industry Compliance and Quality Assurance

Compliance is non-negotiable for this chemical, especially given its potential use in electronics and consumer-facing products.

• RoHS Compliance: The substance is generally compliant with the Restriction of Hazardous Substances (RoHS) directive (2011/65/EU) as it is not a restricted heavy metal or specific halogenated compound. However, suppliers must provide a RoHS Declaration and Full Material Declaration (FMD).
• REACH Registration: As an EU-registered chemical, the substance must be covered under REACH registration. Suppliers must provide the Safety Data Sheet (SDS) compliant with Regulation (EC) No 1907/2006.
• Documentation Standards: Per IEC 63000 framework guidelines, technical files should include:
  • Current Certificates of Analysis (CoA) for every batch.
  • Material Specifications consistent with the actual parts supplied.
  • Exemption Details if the chemical is used in a specific restricted application (rare for this surfactant).
• Testing Frequency: While documentary review is the first step, RoHS testing is recommended if the supplier changes, the formulation changes, or if the material is sourced from a region with high risk of adulteration.

Actionable Recommendation: Do not accept generic "Compliant" statements. Require a batch-specific CoA and a Supplier Declaration of Conformity (DoC) referencing the specific RoHS directive version. If the chemical is intended for battery electrolytes, request a Technical Specification Sheet detailing the absence of halogenated impurities, which can degrade battery performance.

---

3. Cost Efficiency and Integration Capabilities

• Estimated Price Range: Typical B2B range is $4.50 – $8.50 USD per kg for industrial grade; $12.00 – $25.00 USD per kg for battery-grade or high-purity electronic grade.
• Minimum Order Quantity (MOQ):
  • Drum (200kg): 1 – 5 drums.
  • IBC Tote (1000kg): 1 – 2 totes.
  • Bulk Tanker: 10,000 kg+ (negotiable).
• Lead Time: 2 – 4 weeks for standard stock; 6 – 8 weeks for custom synthesis or high-purity grades.
• Integration: Highly compatible with standard aqueous processing lines. It requires no special mixing equipment but may require inert atmosphere storage for battery applications to prevent moisture absorption.
• Logistics: Classified as non-hazardous in most jurisdictions (UN Number may vary by concentration), simplifying shipping costs compared to hazardous chemicals.

Actionable Recommendation: For cost efficiency, negotiate volume discounts for annual contracts if the chemical is a recurring raw material. If using for battery electrolytes, prioritize moisture control in the supply chain (dry nitrogen purging) over the lowest unit price, as moisture content directly impacts battery cycle life.

---

4. Typical Use Cases

• Lithium-Ion Battery Electrolytes: Used as a co-solvent or additive to improve ionic conductivity and form stable Solid Electrolyte Interphase (SEI) layers.
• Advanced Cleaning Agents: High-performance degreaser for precision electronics and semiconductor manufacturing due to low surface tension and excellent wetting properties.
• Textile and Leather Processing: Acts as a leveling agent and dyeing assistant, providing uniform color distribution.
• Personal Care Formulations: Used in shampoos and body washes as a mild surfactant and foam booster.
• Agricultural Adjuvants: Enhances the spreadability and absorption of pesticides and herbicides.

Actionable Recommendation: Define the application grade clearly in the RFP. A "General Industrial" grade is unsuitable for battery electrolytes due to trace metal impurities. Ensure the supplier has experience supplying the specific industry (e.g., "Battery Grade" certification history) to avoid integration failures.

---

5. Long-Term Planning Considerations

• Market Trends: Demand is projected to rise by 5–8% CAGR over the next 5 years, driven primarily by the electric vehicle (EV) battery sector. The shift toward high-nickel cathodes and solid-state batteries increases the need for specialized electrolyte additives like this sulfonate.
• Supply Chain Resilience: Raw material volatility (ethylene oxide and ethylene glycol derivatives) can impact pricing. Diversify suppliers across different geographic regions (e.g., Asia and Europe) to mitigate regional disruption risks.
• Regulatory Evolution: Monitor updates to REACH and TSCA regulations. While currently compliant, future restrictions on glycol ethers or sulfonates could require reformulation.
• Sustainability: Increasing demand for "Green Chemistry" certifications. Plan for suppliers who can provide Life Cycle Assessment (LCA) data or bio-based feedstock options.

Actionable Recommendation: Establish a multi-year supply agreement with at least two qualified suppliers to hedge against raw material price spikes. Include a clause for regular RoHS/REACH compliance reviews (annually or upon regulation updates) to ensure long-term eligibility for export markets.

---

6. Special Product Recommendations

The following table compares potential product variants based on buyer profile and risk factors.

| Product Type | Best-Fit Buyer | Key Specs | Risk Check | Procurement Advice | | :--- | :--- | :--- | :--- :--- | | Battery Grade | EV & Energy Storage Manufacturers | Purity >99.0%, H2O <0.1%, Low Heavy Metals | High (Moisture sensitivity) | Require batch-specific CoA and nitrogen-purged packaging. | | Industrial Grade | Chemical Blenders / Cleaning Formulators | Purity 98.0%+, Standard Viscosity | Medium (Batch consistency) | Standard drums are sufficient; verify RoHS declaration. | | Custom Synthesis | R&D / Specialty Chemical Labs | Tailored impurity profile, Small MOQ | High (Lead time) | Use for prototyping; scale up only after stability testing. | | Bulk Liquid | Large Scale Manufacturers | 1000kg IBC, Low Unit Cost | Medium (Storage capacity) | Ensure on-site moisture control and inert storage tanks. |

Actionable Recommendation: Select Battery Grade only if the application is critical for energy density and cycle life. For general cleaning applications, Industrial Grade offers the best cost-performance ratio. Always verify the shelf life (typically 12–24 months) before placing large orders.

---

7. Frequently Asked Questions (FAQ)

Q1: Is RoHS testing mandatory for this chemical? A: Not always mandatory for every batch if the supplier provides a valid, current RoHS Declaration and Full Material Declaration. However, testing is recommended if the supplier changes, the material source changes, or if the end-product is subject to strict electronic component regulations.

Q2: What documents should I request from the supplier? A: You should request a Certificate of Analysis (CoA), Safety Data Sheet (SDS), RoHS Declaration, Full Material Declaration (FMD), and Technical Specifications. These must be product-specific and current.

Q3: How often should I review RoHS compliance? A: Compliance should be reviewed whenever the supplier changes, materials change, product designs change, exemptions expire, or regulations are updated. An annual review is a best practice.

Q4: Can this chemical be used in lithium-ion batteries? A: Yes, specifically high-purity grades are used as electrolyte additives to improve conductivity and SEI layer formation. Standard industrial grades may contain impurities that degrade battery performance.

Q5: What is the typical shelf life of this product? A: Typically 12 to 24 months from the date of manufacture, provided it is stored in a cool, dry place in sealed containers. It is hygroscopic and absorbs moisture from the air.

Q6: Is this chemical considered hazardous for transport? A: Generally, it is classified as non-hazardous for transport in most jurisdictions, but specific concentration limits and local regulations (e.g., DOT, ADR) must be verified on the SDS.

Q7: What is the difference between IEC 63000 and RoHS? A: RoHS is the regulation restricting hazardous substances. IEC 63000 is the technical standard framework used to organize the technical documentation (like the CoA and FMD) to demonstrate compliance with RoHS.

Q8: How do I handle moisture sensitivity during procurement? A: Request packaging with desiccants or nitrogen purging. For battery applications, specify "Low Moisture" grades and verify water content via Karl Fischer titration on the CoA.