SODIUM HYDROXIDE is graded B (Low Concern) by Expert·ING, based on COSING, FDA regulatory data. It is restricted under EU COSING — AnnexIII-CONCENTRATION-.
SODIUM HYDROXIDE
Lye or Caustic Soda
Safety grade: B
Sodium hydroxide is a strong alkaline chemical commonly known as lye. It's a white solid that dissolves in water to create a highly basic solution and is used in many industrial and household products.
In cosmetics, sodium hydroxide adjusts the pH balance of products to make them less acidic and can alter the structure of proteins in formulations, helping achieve desired product textures and stability.
Graded using: COSING, FDA.
- EU COSING — Restricted
Last verified: May 26, 2026
Other Buffering ingredients
- CITRIC ACID — Grade B
- LACTIC ACID — Grade B
- SODIUM CITRATE — Grade A
- TRIETHANOLAMINE — Grade C
- SODIUM LACTATE — Grade A
- POTASSIUM HYDROXIDE — Grade B**
- UREA — Grade B
- SODIUM BICARBONATE — Grade A