Metaphosphoric Acid
AKA “37267-86-0, Phosphenic acid, MTK99R3UV0, RefChem:156792, DTXSID301015564, 233-750-4, 253-433-4, meta-Phosphoric acid, 10343-62-1
Acid
Ingredient Facts
Metaphosphoric acid
AKA: 37267-86-0, Phosphenic acid, MTK99R3UV0, RefChem:156792, DTXSID301015564, 233-750-4, 253-433-4, Meta-Phosphoric acid, 10343-62-1
Acid · Buffering · EWG: 4
Synthetic
Chelating Agent
Acid
Not Clean
Phosphonate(1-) is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in phosphonic acid. It is a phosphorus oxoanion and a monovalent inorganic anion. It is a conjugate base of a phosphonic acid. It is a conjugate acid of a phosphonate(2-).
Formula
HO3P
Mol. Weight
79.98
CAS #
37267-86-0
Form
Liquid
State
Other Solid
See origin →
Functions
Buffering
Chelating
Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.
Stabilizes pH
Removes Metal Ions
Antioxidant Protection
Locks In Moisture
Fights Bacteria
Maintains optimal pH
Binds metal ions
Traditional Use
Synthetic compound developed in the 20th century primarily for industrial and food preservation applications; adopted in cosmetics for pH regulation and as an antioxidant stabilizer in formulations.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR