Caustic soda flakes for soap and detergents

How the industry uses caustic soda flakes

Soap is made by saponification — reacting fats and oils with sodium hydroxide. The reaction is unforgiving: the NaOH charge is calculated from the saponification value of the fat blend, so the assay of your caustic directly determines whether every batch comes out on specification.

• Saponification of tallow, palm oil and other fat blends for bar soap
• Production of liquid soaps and detergent formulations
• pH adjustment in detergent slurry and finished-product correction
• Manufacture of fatty acids by fat splitting

What to specify when you buy

• Consistent assay, batch to batch — a drifting NaOH content forces constant recipe corrections. Our batches are independently tested; the March 2026 third-party result was 99.1%.
• Low sodium carbonate — carbonate does not saponify fats; it just dilutes your charge and can affect soap texture.
• Clean, white flakes — iron and colour bodies carry straight into the finished soap.

Recommended supply

Soap plants typically order the 99% min grade in 25 kg bags. Ask for the batch COA with your offer and keep it with your formulation records.

Full technical data on the caustic soda flakes product page · packing and container details under packing and loading · storage guidance in our handling guide.