Difference between Trideceth-5, Trideceth-7, and Trideceth-12

The primary difference between Trideceth-5, Trideceth-7, and Trideceth-12 lies in their HLB (Hydrophilic-Lipophilic Balance) value.

• HLB is a measure that indicates how much a surfactant or emulsifier is attracted to water (hydrophilic) versus oil (lipophilic).
  • Lower HLB values (typically 1-8) mean the substance is more oil-loving (lipophilic) and better for water-in-oil (W/O) emulsions.
  • Higher HLB values (typically 10-18) mean the substance is more water-loving (hydrophilic) and better for oil-in-water (O/W) emulsions or as a solubilizer.

For the Trideceth series, the number (5, 7, or 12) indicates the average number of ethylene oxide units attached to the tridecyl alcohol chain. More ethylene oxide units make the molecule more hydrophilic, thus increasing the HLB value.

• Trideceth-5 has an approximate HLB of 10-11. With a lower HLB compared to the others, it is relatively more lipophilic.
• Trideceth-7 has an approximate HLB of 12, placing it in the intermediate range between Trideceth-5 and Trideceth-12.
• Trideceth-12 has an approximate HLB of 14.0-14.5. This higher HLB value makes it significantly more hydrophilic.

What does HLB 14.0-14.5 mean?

An HLB value in the range of 14.0-14.5 is considered a high HLB. This indicates that the substance is strongly hydrophilic (water-loving). Emulsifiers with this HLB range are highly effective at creating stable oil-in-water (O/W) emulsions, where oil droplets are dispersed within a continuous water phase. This is typical for many lotions, creams, and other products where oil needs to be dispersed evenly in a water base.