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RestrictedBinding ruleNZOriginal is EnglishOfficial-source import checked

Potassium fluorosilicate (dipotassium hexafluorosilicate)

New Zealand Cosmetic Products Group Standard Schedule 5, reference 41.

All New Zealand recordsOpen ingredient profileCompare all marketsOpen official source

Regulatory decision and full conditions

Status
Restricted
Legal role
Binding rule
Regulatory summary
New Zealand Cosmetic Products Group Standard Schedule 5, reference 41.
Conditions and restrictions
Product scope: Oral products · Maximum concentration: 0.15% calculated as F When mixed with other fluorine compounds permitted under Schedule 5, total F concentration must not exceed 0.15% · Warnings: Contains potassium fluorosilicate. For any toothpaste with compounds containing fluorine at a concentration of 0.1 to 0.15%, calculated as F, unless it is already labelled as contra-indicated for children (e.g. for adult use only) the following labelling is obligatory: Children five years and under should use a smear of toothpaste and children six years and over should use a pea-sized amount of toothpaste.

Substance identity

Official source name
Potassium fluorosilicate (dipotassium hexafluorosilicate)
CAS
16871-90-2
EC
240-896-2
Identity mapping
cas_number
Linked ingredient
POTASSIUM FLUOROSILICATE
Search this identity across the siteCAS 16871-90-2EC 240-896-2

Linked CosIng identity data

Names and aliases

POTASSIUM FLUOROSILICATE

CosIng description: Dipotassium hexafluorosilicate

EU inventory restriction note: III/41

Recorded cosmetic function: ANTIPLAQUE, ORAL CARE

Function pages:ANTIPLAQUE, ORAL CARE

View the complete ingredient profile

Cross-market snapshot for this identity

Exact linked records currently present in this site. An absent market means no imported exact match, not permission to use the substance.

6 market datasets
PubChem 2D chemical structure for CAS 16871-90-2
CAS 16871-90-2PubChem CID 61851

Verified chemistry for CAS 16871-90-2

Potassium hexafluorosilicate

IUPAC name
dipotassium;hexafluorosilicon(2-)
Molecular formula
F6K2Si
Molecular weight
220.272 g/mol
Exact mass
219.8947585 Da
Monoisotopic mass
219.8947585 Da
Topological polar surface area
0.0 Ų
Molecular complexity
62.0
Formal charge
0
Hydrogen-bond donors
0
Hydrogen-bond acceptors
7
Rotatable bonds
0
Heavy atoms
9
Covalent units
3

Names and synonyms reported to PubChem

Potassium fluosilicatePotassium silicofluorideDipotassium hexafluorosilicate2610W49XYDDipotassium hexafluorosilicate(2-)EINECS 240-896-2UN2655UNII-2610W49XYD
16 more reported names
Silicate(2-), hexafluoro-, potassium (1:2)POTASSIUM HEXAFLUOROSILICATE [MI]SILICATE, HEXAFLUORO-, DIPOTASSIUMEC 240-896-2RefChem:175487FLUOSILICATE DE POTASSIUMDipotassium hexafluorosilicate(2)FLUOROSILICATE DE POTASSIUMSILICOFLUORURE DE POTASSIUMSilicate(2), hexafluoro, dipotassiumSilicate(2), hexafluoro, potassium (1:2)POTASSIUM FLUOROSILICATESilicate(2-), hexafluoro-, dipotassiumdipotassium hexafluorosilanediuideF6K2SiK2SiF6
Open full PubChem recordSafety and hazards at PubChemPubChem annotationsChemical classifications3D structure image
External database identifiers
Advanced structure statistics
Defined atom stereocentres
0
Undefined atom stereocentres
0
Defined bond stereocentres
0
Undefined bond stereocentres
0
3D conformers
0
Machine-readable structure identifiers
SMILES
F[Si-2](F)(F)(F)(F)F.[K+].[K+]
InChI
InChI=1S/F6Si.2K/c1-7(2,3,4,5)6;;/q-2;2*+1
InChIKey
UUHPPUWEDCVPCO-UHFFFAOYSA-N

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Official source and provenance

Registered source
New Zealand cosmetic product schedules 4–8
Source reference
Schedule 5, reference 41, source row 62
Source record ID
S5-62
Source version
effective-2026-01-01
Source language
English
Translation status
Original is English
Effective date
2026-01-01
Source updated
2024-01-01
Snapshot checked
2026-08-30 04:54 UTC
Validation method
openpyxl extraction; reviewed per-schedule counts
SHA-256
4e62e372fb0aad7ac630af8c41fa50b38b52a793fd51b99697a65f8ecce1ae8a

Registered dataset notes

Dataset coverage
Prohibited and restricted substances, permitted colorants, preservatives and UV filters
Authority note
Official EPA group standard schedules; current market-specific rule source
Inspect the exact official sourceRegulator guidance

How this record fits the market dataset

2913
current New Zealand records
390
records marked Restricted
2913
records from this source version
2821
market records with CAS identity

Status distribution

Permitted list with conditions: 357Prohibited: 2166Restricted: 390

Condition text is present on 747 of 2913 current records. An empty condition field is interpreted according to the record type above; it is never converted into an unrestricted-use claim.

New Zealand market context

Complete schedules dataset

Coverage version: Cosmetic Products Group Standard schedules effective 1 January 2026

Schedules 4–8: prohibited, restricted, colourant, preservative and UV-filter entries.

Verification checklist

  1. Search exact identity across Schedules 4–8.
  2. Apply use, concentration and warning conditions.
  3. Check hazardous-substance classification and Group Standard scope.
  4. Confirm the latest legal instrument, not only the spreadsheet.

Official market sources

Verification workflow and record completeness

Before using this result in a compliance decision

  1. Confirm that “Potassium fluorosilicate (dipotassium hexafluorosilicate)” and every CAS/EC identifier refer to the material in your supplier specification.
  2. Search exact identity across Schedules 4–8.
  3. Apply use, concentration and warning conditions.
  4. Check hazardous-substance classification and Group Standard scope.
  5. Confirm the latest legal instrument, not only the spreadsheet.
  6. Document the source version and recheck the regulator before manufacture, notification or market placement.

Fields available in this record

  • Official substance nameAvailable
  • CASAvailable
  • ECAvailable
  • Separate condition textAvailable
  • Effective dateAvailable
  • Snapshot hash and methodAvailable

Questions this page answers

This substance is not unrestricted: cosmetic use is subject to the conditions in the cited official record. Check product type, body area, concentration, purity and warning requirements before deciding whether a formulation is compliant.

If this row does not reproduce conditions, open the cited official detail because omission does not mean unrestricted use. The searchable spreadsheet is an aid; the legal Group Standard and incorporated notices remain authoritative.

The record cites Schedule 5, reference 41, source row 62, source version effective-2026-01-01. Open the official source.

No. CAS helps resolve identity, but jurisdictions can classify the same substance differently and can apply different product scopes, limits, warnings and transition dates.

Stable citation

Potassium fluorosilicate (dipotassium hexafluorosilicate). Schedule 5, reference 41, source row 62. New Zealand. Source version effective-2026-01-01. CosIng Checker regulatory record: https://cosingchecker.com/regulations/nz/records/8906/

Cite the regulator as the legal authority. This page is a structured evidence index and verification aid, not a substitute for the official text or professional legal assessment.

Interpretation and limits for New Zealand

This substance is not unrestricted: cosmetic use is subject to the conditions in the cited official record.

Check product type, body area, concentration, purity and warning requirements before deciding whether a formulation is compliant.

How to interpret the legal role

The cited row forms part of a binding rule or legally incorporated list for this market.

Evidence on this page

  • Recorded outcome: Restricted
  • Legal role: Binding rule
  • Source version: effective-2026-01-01
  • Effective date: 2026-01-01

What it does not prove

The searchable spreadsheet is an aid; the legal Group Standard and incorporated notices remain authoritative.

Further authoritative substance research

These sources can add identity, safety, exposure or hazard context. A link is not evidence that the database contains this exact substance, and none of these sources overrides the market decision above.

Cosmetic Ingredient Review safety assessments

Expert Panel conclusions, assessed ingredient groups, use conditions, dates and report documents

Independent expert review considered by FDA; not a government approval or binding market rule

Research this identity at the source

FDA Global Substance Registration System

UNII identifiers, preferred names, substance types, codes and public substance relationships

Identity registry only; UNII availability does not imply FDA review or approval

Research this identity at the source

ILO/WHO International Chemical Safety Cards

Hazards, symptoms, first aid, storage, incompatibilities and physical properties for covered chemicals

International occupational chemical-safety reference; not cosmetic-use approval

Research this identity at the source

Japan NITE-CHRIP

Chemical identity, Japanese and foreign legal lists, GHS hazards and exposure-related information

Chemical-management evidence; cosmetic status remains governed by the applicable MHLW standard and market rules

Research this identity at the source

NIOSH Pocket Guide to Chemical Hazards

REL, PEL, IDLH, properties, exposure routes, symptoms, target organs, first aid and measurement methods for covered workplace chemicals

US occupational-health guidance and limits; not a cosmetic ingredient decision

Research this identity at the source

OECD eChemPortal

Gateway to authority-owned physical-property, fate, ecotoxicity, toxicity, exposure and GHS records

Discovery gateway; each linked authority remains responsible for its data

Research this identity at the source

US EPA CompTox CTX APIs

API key required for import

DTXSID identity, experimental and predicted properties, toxicity, bioactivity, exposure and environmental data

Scientific and computational evidence; predictions must remain labelled and do not determine cosmetic legality

Research this identity at the source