According to the technical data from Guoli Chemical, the core advantages of emulsifier SG-100 (PEG-100 Stearate) lie in its **excellent safety, extremely high monoester purity, wide application adaptability, and outstanding hydrophilic emulsifying ability**, making it a preferred choice in high-end cosmetics and strict industrial fields.
The following is a detailed analysis of its advantages based on real product data:
### 1. Extremely Low-Risk Safety and Environmental Characteristics
SG-100 has exceptionally favorable toxicological and environmental safety data among similar products, making it suitable for fields with stringent safety requirements:
* **Non-toxic and Non-irritating**: Rat acute oral LD₅₀ > 5000 mg/kg, classified as practically non-toxic. Primary skin irritation index < 0.5, no significant irritation, mild and reversible eye irritation.
* **No Genetic or Reproductive Toxicity**: Negative in Ames test, scientifically verified to have no risk of genetic or reproductive toxicity.
* **Eco-friendly**: Shows rapid biodegradability (OECD 301 method, >60% degradation in 28 days) and extremely low ecotoxicity to aquatic organisms (fish 96h LC₅₀ > 100 mg/L).
### 2. High Purity Components and Excellent Emulsification Efficiency
The high active content of SG-100 ensures stable effects at low addition levels in practical applications:
* **High Monoester Content**: Monoester content ≥90%, diester content ≤5%, indicating a very high proportion of active emulsifying components.
* **Very High HLB Value**: HLB value up to **18.5-19**, making it a typical hydrophilic emulsifier that is easily soluble in water, ideal for preparing oil-in-water (O/W) emulsions (e.g., light creams, lotions).
* **Powerful Emulsification**: Extremely low critical micelle concentration (about 1×10⁻⁴ mol/L), effectively reducing surface tension (1% aqueous solution about 40 mN/m), forming stable and fine emulsions with small amounts.
### 3. Wide Range of Application Scenarios and Good Compatibility
As a nonionic surfactant, SG-100 shows strong adaptability in complex systems:
* **Multi-field Versatility**: Covers cosmetics (O/W emulsifier, solubilizer), textiles (softening antistatic agent), plastics (internal lubricant antistatic agent), and pesticides (high-efficiency emulsifier).
* **Strong Chemical Stability**: Stable in weak acids, weak bases, and hard water. Although it may hydrolyze under strong acid or alkaline conditions, it has excellent stability within the pH range of 3-8 of conventional formulations and can be compounded with various anionic, cationic, and nonionic auxiliaries.
### 4. Specific Application Suggestions and Dosage
Based on its superior properties, the following recommendations are given:
* **Cosmetic Creams/Lotions**: As the main emulsifier, recommended dosage 1.0% – 3.0%. It imparts a fine, bright white appearance and a refreshing, non-greasy skin feel.
* **Sun Protection Products**: As an efficient solubilizer and dispersant, recommended dosage 0.5% – 2.0%, helping to uniformly disperse oil-soluble UV filters in water-based systems.
* **Textile Softening Treatment**: Recommended dosage 0.5% – 2.0% (on weight of fabric), providing a soft, smooth hand feel and reducing static electricity.
* **Plastic Processing**: As an internal lubricant, recommended dosage 0.2% – 1.0%, effectively improving melt flow and demolding, while imparting antistatic properties to the product.
### 5. Advantages Compared to Other Low-EO SG Series Products
Compared to low-EO products in the same series, such as SG-6 or SG-10:
* **Water Solubility**: SG-100 is highly soluble in water, while low-EO SG series are mostly oil-soluble or dispersible.
* **Functional Focus**: SG-100 focuses more on **efficient O/W emulsification and solubilization**, while low-EO products mainly serve as W/O emulsifiers or wetting dispersants in the oil phase.
* **Skin Feel**: SG-100 provides a more refreshing, non-greasy skin feel after film formation, making it more suitable for modern skincare formulations.
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### Technical Parameters Quick View (Real Data Source)
| Parameter Name | Technical Parameter |
| :--- | :--- |
| **Ion Type** | Nonionic |
| **Appearance (25℃)** | White to slightly yellow waxy solid |
| **HLB Value** | 18.5 – 19 |
| **Monoester Content** | ≥ 90% |
| **Acid Value** | ≤ 2 mgKOH/g |
| **Saponification Value** | 12 – 16 mgKOH/g |
| **Active Content** | ≥ 99% |
| **Water Content** | ≤ 1% |
| **pH (1% Aqueous Solution)** | 5.0 – 7.0 |
| **Melting Point** | 50 – 55℃ |
| **Heavy Metal Content** | ≤ 20 mg/kg |
**Cautions**: Although SG-100 is safe and non-toxic, standard operating procedures should still be followed during handling to avoid contact with eyes. Its storage temperature should be controlled between 5℃ and 40℃, protected from light and moisture, to ensure product quality and shelf life.
