Sodium Hydroxide(caustic soda)

CAS No-  1310-73-2

Sodium hydroxide is overall considered safe for general use — but only in small amounts, at lower concentrations.

At higher concentrations, sodium hydroxide is unsafe. It can cause chemical burns, as noted above, along with hives and holes in your skin. It’s also very harmful if you eat it or inhale its fumes.

But here’s the good news: Skin care and beauty products only contain this ingredient in small amounts, so you’re unlikely to experience a chemical burn from any skin care products you’ve purchased. You also don’t need to worry about toxic fumes from your skin care products.

In other words, there’s no need to do a clean sweep of your cabinets or completely overhaul your skin care routine.