Sodium Borate
AKA “BORAX, Borax (B4Na2O7.10H2O), Sodium borate decahydrate, Sodium pyroborate decahydrate, Antipyonin, Borascu, Boricin, Solubor”
Synthetic
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Ingredient Facts
Sodium borate
AKA: BORAX, Borax (B4Na2O7.10H2O), Sodium borate decahydrate, Sodium pyroborate decahydrate, Antipyonin, Borascu, Boricin, Solubor
Synthetic · Buffering | Viscosity Controlling | pH Adjusting | Chelating Agent · EWG: 4
Plant-Derived
Chelating Agent
Synthetic
Clean
Helps balance pH levels in formulas to keep products stable and effective on skin.
Solubility Aqueous solution is alkaline to litmus and phenolphthalein; pH about pH = 9.5
Formula
B4H20Na2O17
Mol. Weight
381.40
CAS #
1330-43-4, 1303-96-4
Form
Powder
Plant-Derived
Synthetic. Sodium borate is synthesized from boron minerals, typically borax or boric acid, derived from naturally occurring boron deposits. It is produced through neutralization of boric acid with sodium hydroxide or sodium carbonate solution.
Function
Buffering | Viscosity Controlling | pH Adjusting | Chelating Agent
Benefits
Stabilizes pH
Traditional Use
Borax (sodium borate) has been used for centuries in traditional medicine and beauty preparations as an antimicrobial and pH buffer. Historically used to soften water and preserve cosmetic formulations before modern preservative systems were developed.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
No
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR