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The safety standards for SLES 70% cover four core dimensions: basic physical and chemical properties, impurity control, toxicology & environmental impact, and downstream application. The standards are mainly based on authoritative regulations such as China’s GB, EU’s REACH, and US FDA requirements. Key limits and testing methods are as follows:

1. Core Applicable Standard Systems

2. Key Safety Indicators & Limits

2.1 Basic Physical and Chemical Safety Indicators

2.2 Safety Limits for Residual Impurities (High-Risk Items)

2.3 Toxicological & Environmental Safety Standards

• Skin/Eye Irritation: The undiluted solution shall meet the criteria of acute skin irritation ≤ mild irritation and acute eye irritation ≤ reversible mild damage (OECD 404/405 standards). In daily chemical products, dilute to 1%–5% and compound with mild surfactants to reduce risks.

• Sensitization: Must pass the human repeat insult patch test (HRIPT) with no clear sensitization signals (conclusion of CIR report).

• Biodegradability: ≥90% (within 28 days), compliant with EU EEC 73/404/EEC, reducing environmental accumulation risk.

2.4 Safety Specifications for Downstream Applications

3. Key Safety Risk Control Points

1. Procurement Compliance: Prioritize products compliant with GB/T 13529-2022 and REACH certification. Request test reports for 1,4-dioxane and ethylene oxide residues.

2. Operational Protection: Wear chemical-resistant gloves and goggles when handling 70% undiluted solution to avoid direct contact with skin and eyes. Rinse thoroughly with plenty of water for at least 15 minutes in case of accidental contact.

3. Formula Control: Dilute to a safe concentration in daily chemical products, compound with mild surfactants (e.g., betaine, cocamide MEA), and control pH value within 5.5–7.0.

4. Environmental Discharge: Industrial wastewater shall undergo biochemical treatment to reduce SLES concentration to ≤10 mg/L before discharge, complying with GB 8978 wastewater standards.

4. Conformity Assessment

• Qualified Criteria: Active matter content 68%–72%, impurities meeting limit requirements, toxicological/environmental indicators up to standard, and compliance with downstream application concentration specifications.

• Unqualified Items: Active matter content <68% or >72%, 1,4-dioxane >30 ppm, pH <7.0 or >9.0, etc. Reject or rework the non-conforming products.