Is Potassium Fluorosilicate safe in cosmetics?
Potassium Fluorosilicate has a safety rating of "MODERATE" in our database. EU status: restricted. US status: permitted.
Potassium Fluorosilicate
INCI: POTASSIUM FLUOROSILICATE
Potassium Fluorosilicate (CAS 16871-90-2) is a cosmetic cosmetic ingredient functioning as Antiplaque, oral care. NOAEL 1.333333 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: restricted, max 0.15%; GHS signal word DANGER. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 16871-90-2 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Potassium Fluorosilicate is classified GHS Danger (H301, H311, H331, H316, H320, H335, H372, H319) in the chemicals database but is restricted in EU cosmetics at max 0.15%.
Source: Cosmetics: ingredients.eu_status/eu_max; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Antiplaque, oral care
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
dipotassium;hexafluorosilicon(2-)
InChIKey
UUHPPUWEDCVPCO-UHFFFAOYSA-N
Regulatory Status
EU EU Status
restricted
EU Max Conc.
0.15%
US US Status
permitted
US Notes
Not listed as an approved OTC anticaries active in the US FDA monograph; limited US cosmetic use
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Potassium Fluorosilicate.
Calculate MoS for your specific formulation with the MoS Calculator.
GHS Hazard Classification
Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.
Signal Word
DANGER
Pictograms
SkullToxicCancerHealth haz
Hazard Statements
Toxic if swallowed May cause damage to blood and cardiovascular system May cause damage to teeth and bones through prolonged or repeated exposure
Short-term Exposure Effects
The substance may cause effects on the blood and calcium metabolism. This may result in cardiac disorders. Medical observation is indicated. See Notes.
Long-term Exposure Effects
The substance may have effects on the bones and teeth. This may result in fluorosis.
Routes of Exposure
The substance can be absorbed into the body by ingestion.
Pre-Calculated Safety Assessment
Pre-calculated NOAEL → SED → MoS audit trail for Potassium Fluorosilicate across SCCS product categories, with measured dermal absorption where available.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1,000 - 10,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Hazard classification: Restricted (Annex XVII)
Expanded Jurisdictional Detail
Additional regulatory detail beyond the 7-jurisdiction summary: Saudi SFDA, Korea MFDS, ASEAN ACD, Japan/Korea, Brazil/India, and cross-jurisdictional restriction entries.
SA Saudi SFDA (III - Restricted)
Product type: Oral products. Max: 0,15 % calculated as F. When mixed with other fluorine compounds permitted under this Annex, total F concentration must not exceed 0,15 %.
BRIN Brazil/India Cosmetics
India: Restricted · max 0,15 % calculated as F. When mixed with other fluorine compounds permitted under this Annex, total F concentration must not exceed 0,15 %
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Safety (1)
ICSC Safety Card
1242
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Pharmaceutical
Regulatory List Membership (1)
EU CosIng Cosmetics Ingredient Database
Expert Verdict
Expert safety assessment and concern-level summary for Potassium Fluorosilicate.
Regulatory Flags
eu_cosing_listed
Chemical Function
Pharmaceutical
Regulatory Lists
Europe; Personal care; restricted
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Potassium Fluorosilicate allowed in the EU?
Potassium Fluorosilicate EU regulatory status: restricted. Maximum allowed concentration: 0.15%. This is based on EU Regulation 1223/2009 and its amendments.
What does Potassium Fluorosilicate do in cosmetics?
Potassium Fluorosilicate functions as: Antiplaque, oral care. It is classified as a cosmetic ingredient in our database. CAS number: 16871-90-2.
Is Potassium Fluorosilicate classified as hazardous under GHS?
Potassium Fluorosilicate carries a GHS signal word of "DANGER". Hazard statements: Toxic if swallowed May cause damage to blood and cardiovascular system May cause damage to teeth and bones through prolonged or repeated exposure. This classification is based on the ILO/WHO International Chemical Safety Card and ECHA C&L inventory data. Note: GHS classification applies to the pure substance — at cosmetic use concentrations, hazard thresholds may not be met.
Is Potassium Fluorosilicate used outside cosmetics?
Potassium Fluorosilicate also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Potassium Fluorosilicate have different safety status in cosmetics vs industrial chemicals?
Potassium Fluorosilicate is classified GHS Danger (H301, H311, H331, H316, H320, H335, H372, H319) in the chemicals database but is restricted in EU cosmetics at max 0.15%.
Compliance Tools
Check Potassium Fluorosilicate compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
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Substance Compliance
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MoS Calculator
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Heavy Metal Limits
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