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Chlorides and other halides

Sodium hexafluorosilicate

Also known as Sodium fluosilicate, Safsan, Salufer

CAS 16893-85-9Formula F6Na2SiMolar mass 188.05 g/molEC 240-934-8
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 86 suppliers listed
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Sodium hexafluorosilicate chemical structure, F6Na2Si, CAS 16893-85-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White granular powder
Melting point
Melts at red heat with decomposition.
Density
2.7 g/cm³.
Solubility
SOL IN 150 PARTS COLD, 40 PARTS BOILING WATER, INSOL IN ALCOHOL
HS code
282690
Category
Chlorides and other halides
UN number
UN 2674
Illustrative photo, granules discharging from a jumbo bag in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Sodium hexafluorosilicate?

Plain description, key identifiers and synonyms

Sodium hexafluorosilicate is a chemical substance with the molecular formula F6Na2Si and a molar mass of 188.05 g/mol. Its CAS registry number is 16893-85-9. The IUPAC name is disodium, hexafluorosilicon(2-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, hexafluorosilicon(2-)
CAS number
16893-85-9 CAS number cross-checked
EC number
240-934-8
Molecular formula
F6Na2Si
UNII
806AV2E065
MDL number
MFCD00003491
INCI name
SODIUM FLUOROSILICATE
InChIKey
TWGUZEUZLCYTCG-UHFFFAOYSA-N
InChI
InChI=1S/F6Si.2Na/c1-7(2,3,4,5)6;;/q-2;2*+1
SMILES (canonical and isomeric)
F[Si-2](F)(F)(F)(F)F.[Na+].[Na+]

Synonyms

  • Sodium fluosilicate
  • Safsan
  • Salufer
  • Sodium silicofluoride
  • Super prodan
  • Destruxol applex
  • Ortho earwig bait
  • Ortho weevil bait
  • Disodium hexafluorosilicate
  • Ens-zem weevil bait
  • Disodium silicofluoride
  • Fluosilicate de sodium
  • Sodium hexafluosilicate
  • Natriumhexafluorosilicat
  • Silicon sodium fluoride
  • Sodium silicon fluoride
  • PSC Co-Op weevil bait
  • Natriumsilicofluorid
  • Disodium hexafluorosilicate (2-)
  • Fluorosilicate de sodium
  • Silicate(2-), hexafluoro-, sodium (1:2)
  • Sodium fluorosilicate
  • disodium, hexafluorosilicon(2-)
  • Sodium silica fluoride
  • Na2SiF6
Show all 32 synonyms
  • ENT 1,501
  • Silicate(2-), hexafluoro-, disodium
  • Fluorosilicate de sodium [ISO-French]
  • F6Na2Si
  • Natrum silicofluoricum
  • Sodium hexafluorosilicate, 98%
  • Disodium hexafluoridosilicate(2-)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White granular powderexp.
Odour
Odorlessexp.
Taste
Tasteless.exp.
Melting point
Melts at red heat with decomposition.exp.
Density
2.7 g/cm³.exp.
Solubility
SOL IN 150 PARTS COLD, 40 PARTS BOILING WATER, INSOL IN ALCOHOLexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
188.05 g/molcalc.
Exact mass
187.9469 Dacalc.
LogP (octanol/water)
-3.85calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
9calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
  • H311Toxic in contact with skin.
  • H331Toxic if inhaled.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2674
Transport hazard class
6.1
Packing group
III

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Sodium hexafluorosilicate suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 86 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

86 suppliers in 16 countries

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Sodium hexafluorosilicate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

In enamels for china & porcelain, manufacture opal glass, insect exterminator & poison for rodents, mothproofing of woolens, vet: pediculicide.

Major use as fluoridation agent for drinking water.

Gelling agent in the Dunlop process (production of latex foam).

Fluoridation, laundry soaps, opalescent glass, vitreous enamel frits, metallurgy (aluminum and beryllium), insecticides and rodenticides, chemical intermediate, glue, leather and wood preservative, moth repellent, manufacture of pure silicon.

Industrial uses: Flocculating agent, Pigment, Filler, Preservative, Cleaning agent, Flux agent, Abrasives.

Consumer uses: Filler, Other.

Use classes: Cosmetics.

Cosmetic ingredient, INCI name SODIUM FLUOROSILICATE(antiplaque, oral care)

Functional uses

  • Abrasive
  • Anti-scaling agent
  • Pharmaceutical

Cosmetic functions

  • Antiplaque
  • Oral care

How it is made

This salt is made by neutralizing fluosilicic acid with sodium hydroxide or sodium carbonate.

From fluorosilicic acid and sodium carbonate or sodium chloride.

Sodium chloride, natural + hexafluorosilicic acid (salt formation).

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex III, restricted in cosmetics
    Name: SODIUM FLUOROSILICATE, Ref no: 40, Annex ref: III/40

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Sodium hexafluorosilicate is traded under.

HS 2826.90Indicative HS code

Fluorides, fluorosilicates, fluoroaluminates and other complex fluorine salts, other

World exports in 2024
$465M
−20.9% vs 2023, imports $484M
2019 to 2024
Top exporters
  1. China52.6%
  2. Germany16.1%
  3. South Korea11.1%
Top importers
  1. Japan33.0%
  2. United States18.8%
  3. South Korea8.4%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Sodium hexafluorosilicate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Sodium hexafluorosilicate, based on the data on this page

What is Sodium hexafluorosilicate?

Sodium hexafluorosilicate is a chemical substance with the molecular formula F6Na2Si and a molar mass of 188.05 g/mol. Its CAS registry number is 16893-85-9. The IUPAC name is disodium, hexafluorosilicon(2-).

What is the CAS number of Sodium hexafluorosilicate?

The CAS registry number of Sodium hexafluorosilicate is 16893-85-9.

What is the molecular formula and weight of Sodium hexafluorosilicate?

The molecular formula of Sodium hexafluorosilicate is F6Na2Si and its molar mass is 188.05 g/mol.

What is Sodium hexafluorosilicate used for?

In enamels for china & porcelain, manufacture opal glass, insect exterminator & poison for rodents, mothproofing of woolens, vet: pediculicide. Major use as fluoridation agent for drinking water. Gelling agent in the Dunlop process (production of latex foam).

Is Sodium hexafluorosilicate hazardous?

Sodium hexafluorosilicate carries the GHS signal word "Danger". Main hazards: toxic if swallowed, toxic in contact with skin, toxic if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Sodium hexafluorosilicate?

Sodium hexafluorosilicate is usually classified under HS code 282690 (Fluorides, fluorosilicates, fluoroaluminates and other complex fluorine salts, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Sodium hexafluorosilicate?

CompoundList lists 86 suppliers of Sodium hexafluorosilicate in United States, India, China, Malaysia and 12 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Sodium hexafluorosilicate in India?

20 suppliers in India list Sodium hexafluorosilicate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Sodium hexafluorosilicate?

Suppliers quote Sodium hexafluorosilicate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Sodium hexafluorosilicate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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