Sodium hydroxide

Supporting ingredient

Lye. It reacts with oils to make bar soap and is also used in tiny amounts to adjust pH in liquids.

In a finished soap it has been used up in the reaction, which is why Dr. Bronner's notes that none remains.

Products here that list it

• Acure Curiously Clarifying Shampoo — Buildup Removal for All Hair

  Shampoo
  Checked vs brand/retailer

• Acure Daily Workout Shampoo with Watermelon & Blood Orange

  Shampoo
  Checked vs brand/retailer

• ACURE Daily Workout Watermelon & Blood Orange Shampoo

  Shampoo
  Checked vs brand/retailer

• Acure Smoothing Shampoo with Coconut Water & Marula Oil

  Shampoo
  Checked vs brand/retailer

• Acure Ultra Hydrating Shampoo with Argan & Pumpkin Seed Oil

  Shampoo
  Checked vs brand/retailerFragrance-free

• ACURE Vivacious Volume Shampoo

  Shampoo
  Checked vs brand/retailer

• Acure Volumizing Shampoo with Mint & Echinacea

  Shampoo
  Checked vs brand/retailer

• Amika Big Hit Volumizing Shampoo

  Shampoo
  Checked vs brand/retailer

• Amika Hydro Rush Intense Moisture Shampoo Moisturizing Shampoo

  Shampoo
  Checked vs brand/retailer

• Amika The Protector Color Protect + Strengthen Shampoo

  Shampoo
  Checked vs brand/retailer

• Andalou Naturals Clarifying Yuzu Grapefruit Body Wash

  Body Wash
  Checked vs brand/retailer

• Attitude Clarifying Conditioner for Oily Hair

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Color Conditioner for Sensitive Scalp, Oat

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Conditioner for Color-Treated Hair, Vegan

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Conditioner for Dry, Damaged Hair, Vegan

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Conditioner for Sensitive, Dry Scalp with Oat

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Fragrance-Free Conditioner, Extra-Gentle

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Hydrating Conditioner with Essential Oils

  Conditioner
  Checked vs brand/retailer

• Attitude Kids Conditioner, Detangling & Vegan

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Moisturizing Conditioner for Very Dry Hair

  Conditioner
  Checked vs brand/retailer

• Attitude Nourishing Conditioner with Essential Oils

  Conditioner
  Checked vs brand/retailer

• Attitude Pregnancy Conditioner with Argan Oil & Shea

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Unscented Volumizing Conditioner with Oat

  Conditioner
  Checked vs brand/retailerFragrance-free

• Attitude Volumizing Conditioner for Fine Hair

  Conditioner
  Checked vs brand/retailerFragrance-free

Questions

Is Sodium hydroxide a sulfate?

No.