A specialty chemical blender based in Western Australia was receiving an increasing number of complaints regarding product instability in their multipurpose cleaner concentrate. After 4 to 6 weeks of storage, especially in cooler regions, the product began to separate into layers, severely affecting appearance, performance, and customer confidence.

The root of the problem was identified as surfactant incompatibility. The existing formulation used a blend of nonionic ethoxylated surfactants that were not thermally stable, particularly under repeated thermal cycling (cooling and reheating during transportation or storage). Inconsistent emulsification and phase separation led to high product return rates, loss of business accounts, and escalating technical support costs.

Our technical team stepped in with a complete system analysis:

• We conducted thermal cycling compatibility mapping on the current surfactant blend.

• We found that one surfactant—an ethoxylated alcohol—was crystallizing at lower temperatures and disrupting micellar structure.

• Using advanced surfactant rheology screening, we identified a temperature-stable block copolymer as a drop-in replacement.

• Additionally, we introduced a low-level hydrotrope to improve solubilization and microemulsion stability.

Within 3 weeks, the reformulated sample underwent accelerated aging tests and demonstrated stable clarity, phase integrity, and performance across temperature ranges of 4°C to 45°C.