| Chemical Structure | Phthalic acid + 2 octyl groups (C8); larger molecule | Phthalic acid + 2 butyl groups (C4); smaller molecule |
| Molecular Weight | Higher | Lower |
| Volatility & Migration | Low, stable, less migration | High, prone to volatilization and migration |
| Plasticizing Efficiency | Moderate, balanced performance | Higher, stronger initial effect |
| Durability | Good permanence, long-lasting | Poor permanence, short-term effect |
| Heat/Weather Resistance | Good | Poor |
| Applications | PVC wires, cables, hoses, films, synthetic leather, footwear, toys | Paints, inks, adhesives (solvent role); limited PVC use |
| Regulatory Status | Restricted in sensitive uses (e.g., toys, food contact) | Stricter restrictions; in many regions banned in toys/food packaging |
| Overall Feature | Widely used, versatile, durable | Strong but short-lived effect, mainly for coatings/adhesives |
