The core advantage of PEG-400 Distearate (PEG-400 DS) first stems from its precise molecular structure design. The PEG-400 segment (about 8~12 EO units) gives the product an HLB value of approximately 7.5, which falls into the "golden balance zone" for emulsifiers—unlike low molecular weight PEG esters (e.g., PEG-100 DS) that lack sufficient hydrophilicity to stabilize O\/W emulsions alone, and unlike high molecular weight PEG esters (e.g., PEG-6000 DS) that are too hydrophilic and contribute limited consistency. Among similar PEG distearate products, 400 DS achieves the best compromise between emulsifying and thickening properties, making it a typical "multi-purpose" agent in cream and lotion formulations.
Secondly, the purity index of Guoli Chemical's 400 DS is significantly higher than conventional market products. The database shows that this product has a diester content ≥90%, monoester content ≤5%, free alcohol ≤1%, active content ≥99%, and acid value and hydroxyl value both ≤5. A higher diester content means a higher proportion of active ingredients, directly leading to better emulsion stability and batch-to-batch consistency. In contrast, conventional similar products on the market typically have a diester content in the range of 80%~85%, with higher monoester and free PEG impurities, which can easily cause consistency drift or emulsion separation during production and storage. Additionally, an iodine value ≤1 indicates extremely low unsaturation of the stearic acid feedstock, fundamentally ensuring the color stability and antioxidant capacity of the final product.
Thirdly, this product establishes a comprehensive advantage in safety, environmental friendliness, and compatibility. Its non-ionic nature allows it to be freely compounded with anionic, cationic, and amphoteric systems, avoiding compatibility issues common with ionic emulsifiers. At the same time, the product is readily biodegradable, with aquatic acute toxicity EC50\/LC50 values >100 mg\/L, and heavy metal content strictly controlled at ≤10ppm, arsenic ≤2ppm, far stricter than general chemical standards, fully meeting the requirements of high-safety applications such as personal care products and cosmetics.
| Parameter | Guoli Chemical 400 DS | Conventional Similar Products | Advantage Explanation |
|---|---|---|---|
| Diester Content | ≥90% | 80%~85% | Higher active ingredient content, better emulsification and thickening efficiency |
| Monoester Content | ≤5% | 8%~15% | Fewer by-products, better formulation stability |
| HLB Value | 7.5 | 6.0~8.5 (varies by molecular weight) | Exactly at the optimal balance point between emulsification and thickening |
| Acid Value (mgKOH\/g) | ≤5 | ≤8~10 | Lower acid value, more friendly to pH-sensitive formulations |
| Hydroxyl Value (mgKOH\/g) | ≤5 | ≤10~15 | Fewer free hydroxyl groups, better storage stability |
| Iodine Value (gI₂\/100g) | ≤1 | ≤3~5 | Extremely low unsaturation, strong resistance to oxidative discoloration |
| Free Alcohol | ≤1% | 1.5%~3% | Fewer impurities, milder skin feel |
| Active Content | ≥99% | 95%~98% | Almost no moisture or volatiles, more economical dosage |
| Heavy Metals | ≤10ppm | ≤20~50ppm | Stricter, meeting high-end cosmetics standards |
| Melting Point | 40~50°C | 36~55°C (wide fluctuation) | Narrow melting range, stable processing window |
Based on the HLB value of 7.5 and high diester purity of 400 DS, it is recommended for priority use in the following scenarios: