Caustic soda, also known as sodium hydroxide (NaOH), is a highly alkaline compound essential for traditional soap making and the preparation of indigo vats.

In soap making, it is used to saponify oils and fats, transforming them into solid soap. In natural dyeing, it plays a key role in creating and maintaining an alkaline environment required for indigo reduction vats.

This product is supplied as a white, odorless solid (flakes or pearls depending on batch), with high purity suitable for craft and studio use.

A reliable staple for both soap makers and natural dyers working with indigo. For use in:

• Cold and hot process soap making
• Indigo vat preparation (fructose vats, 1-2-3 vats, etc.)

  When used in indigo vats, sodium hydroxide helps create the alkaline conditions necessary for reduction. Always measure carefully and follow a trusted vat recipe.

• pH adjustment in dye processes

Specifications:

• INCI: Sodium Hydroxide
• Chemical formula: NaOH
• Appearance: White solid (flakes/pearls)
• Solubility: Fully soluble in water (exothermic reaction)