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Monobasic potassium phosphate

CAS 943540-09-8

Also registered as 7 other CAS numbers

1364712-44-6 · 2133444-20-7 · 2364332-00-1 · 2484993-14-6 · 2745045-20-7 · 7778-77-0 · 16068-46-5

Monobasic potassium phosphate chemical structure

Concern score

Not assessed — no hazard data yet.

Monobasic potassium phosphate in plain language

What it is

On cosmetic ingredient lists it appears as “Potassium phosphate”.

Also known as Potassium phosphate · Potassium dihydrogen phosphate · Potassium phosphate monobasic · Cid 24506 · Monopotassium monophosphate · Potassium acid phosphate

Show all 28 names

Potassium biphosphate · Monopotassium salt phosphoric acid · Potassium phosphate monobasic (anhydrous) · Dihydrogen potassium phosphate · Dihydrogenoorthophosphate de potassium · E-340(I) · Ins NO.340(I) · INS-340(I) · Kalium-dihydrogenphosphat · Kaliumdihydrogenorthophosphat · Monopotassium dihydrogen orthophosphate · Monopotassium dihydrogen phosphate · Monopotassium orthophosphate · Monopotassium phosphate · Monopotassium dihydrogen monophosphate · Potassium dihydrogen orthophosphate · Potassium dihydrogenorthophosphate · dihidrogenoortofosfato de potasio · kalii dihydrogenophosphas · potassium phosphate monobasic. w/v: 1.44 g/l. · Tis-u-sol component potassium phosphate, monobasic · Potassium phosphates component monobasic potassium phosphate

What it does

Used in cosmetics as a pH buffer.

  • Buffering
  • Yeast food, acidity regulator, sequestrant
  • pH adjuster
  • Thickener
  • Flavouring
  • Antimicrobial
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Monobasic potassium phosphate appears in these published regulatory listings.

  • In marketed US drugs
  • Inactive ingredient in US drugs

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Pharma
  • Food
  • Industrial
  • USFDAinactive ingredient database19 entries — 9 administration routes
    • Route: INTRAMUSCULAR; Dosage form: INJECTION; Potency: 0.3 %w/vSource →
    • Route: INTRAVENOUS; Dosage form: INJECTION; Potency: 68 mgSource →
    • Route: INTRAVENOUS; Dosage form: INJECTION, POWDER, LYOPHILIZED, FOR SOLUTION; Maximum daily exposure: 110 mgSource →
    • Route: INTRAVENOUS; Dosage form: INJECTION, SOLUTION; Potency: 1.36 %w/vSource →
    • Route: INTRAVESICAL; Dosage form: INJECTION, SOLUTION; Potency: 29.2 mgSource →
    • Route: NASAL; Dosage form: SOLUTION; Potency: 680 mgSource →
    • Route: NASAL; Dosage form: SPRAY; Maximum daily exposure: 3 mgSource →
    • Route: OPHTHALMIC; Dosage form: SOLUTION; Potency: 0.2 %w/wSource →
    • Route: OPHTHALMIC; Dosage form: SUSPENSION; Potency: 0.44 %w/wSource →
    • Route: ORAL; Dosage form: CAPSULE, COATED PELLETS; Maximum daily exposure: 272 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, DELAYED RELEASE PELLETS; Maximum daily exposure: 272 mgSource →
    • Route: ORAL; Dosage form: SOLUTION; Maximum daily exposure: 287 mgSource →
    • Route: ORAL; Dosage form: SUSPENSION; Potency: 50 mg/5mlSource →
    • Route: ORAL; Dosage form: SYRUP; Maximum daily exposure: 19 mgSource →
    • Route: ORAL; Dosage form: TABLET; Potency: 25 mgSource →
    • Route: ORAL; Dosage form: TABLET, EXTENDED RELEASE; Potency: 4 mgSource →
    • Route: SUBCUTANEOUS; Dosage form: INJECTION; Maximum daily exposure: 8 mgSource →
    • Route: INTRA-ARTICULAR; Dosage form: INJECTION; Potency: 0.3 %w/vSource →
    • Route: AURICULAR (OTIC); Dosage form: SOLUTION; Potency: 0.2 %w/wSource →
  • GLOBALJECFAEvaluated2 entries
    • JECFA evaluation record. Functional class: yeast food, acidity regulator, sequestrant.Source →
    • JECFA evaluation record.Source →
  • USFDAmarketed drug occurrence2 entries
    • FDA NDC lists this ingredient in 17 active drug products and 17 total products.Source →
    • FDA NDC lists this ingredient in 20 active drug products and 21 total products.Source →
  • EUCosIngActiveListed in CosIng inventory for cosmetic use.
    • Listed in CosIng inventory for cosmetic use.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 621 composition records across product categories including Construction and building materials, Laboratory supplies, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Corrosion inhibitor, Phosphate source.
    • EPA CPDat observed this chemical in 621 composition records across product categories including Construction and building materials, Laboratory supplies, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Corrosion inhibitor, Phosphate source.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

    • JECFA evaluation record. Functional class: yeast food, acidity regulator, sequestrant.

      Year not recorded · GLOBAL JECFA listing · Read the source →

    • JECFA evaluation record.

      Year not recorded · GLOBAL JECFA listing · Read the source →

Evidence & sources

No graded research studies for Monobasic potassium phosphate yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

9 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated september 17, 2016

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA Inactive Ingredient Database

    regulatory · updated 2026-01-09

    Open →

  • FDA National Drug Code Directory

    regulatory · updated 2027-12-31

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • WHO JECFA Database

    regulatory · updated 2026-10-04

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →
Reference links (2)
Openfda substance

accessdata.fda.gov

Read →
Openfda substance

codexalimentarius.net

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Monobasic potassium phosphate in a product composition. These are source records, not Greenveil catalog products.

Source records

621

Named organisations

6

Construction and building materialsLaboratory suppliesCleaning products and household careSpecialty occupational productsRaw materialsMedical/dental

Typical roles

BufferingYeast food, acidity regulator, sequestrantpH adjusterThickenerFlavouringAntimicrobial
See products using Monobasic potassium phosphate →

Catalog

Found in these products

Their ingredient lists include Monobasic potassium phosphate; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 103 →Find products without it →