Sodium hexafluorosilicate

Overview IFRA Request a quote

  • Identifiers

    CAS number
    16893-85-9

    Molecular formula
    F6Na2Si

    SMILES
    F[Si-2](F)(F)(F)(F)F.[Na+].[Na+]

    Safety labels

    Acute Toxic
    Acute Toxic

  • Odor profile

  • Properties

    Molecular weight
    188.055 g/mol

    Melting point expt.

    • Melts at red heat with decomposition.

    Solubility expt.

    • SOL IN 150 PARTS COLD, 40 PARTS BOILING WATER; INSOL IN ALCOHOL
    • Insoluble in ethanol.
    • In water, 0.64 g/100 g at 20 °C, 0.76 g/100 g at 25 °C, 1.27 g/100 g at 50 °C, 2.45 g/100 g at 100 °C.
    • Solubility in water, g/100ml at 20 °C: 0.76 (poor)

  • Synonyms

    • Sodium hexafluorosilicate
    • 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
    • DTXSID9036933
    • Disodium hexafluorosilicate (2-)
    • Fluorosilicate de sodium
    • 806AV2E065
    • Silicate(2-), hexafluoro-, sodium (1:2)
    • DTXCID7016933
    • RefChem:1098799
    • 240-934-8
    • 16893-85-9
    • Sodium fluorosilicate
    • disodium;hexafluorosilicon(2-)
    • Sodium hexafluorosilicate [ISO]
    • MFCD00003491
    • Sodium silica fluoride
    • Caswell No. 771
    • Na2SiF6
    • Natriumsilicofluorid [German]
    • HSDB 770
    • EINECS 240-934-8
    • ENT 1,501
    • UN2674
    • Silicate(2-), hexafluoro-, disodium
    • EPA Pesticide Chemical Code 075306
    • Fluorosilicate de sodium [ISO-French]
    • F6Na2Si
    • AI3-01501
    • NATRUM SILICOFLUORICUM
    • Sodium hexafluorosilicate, 98%
    • UNII-806AV2E065
    • Disodium hexafluoridosilicate(2-)
    • Tox21_302311
    • NATRUM SILICOFLUORICUM [HPUS]
    • SODIUM HEXAFLUOROSILICATE [MI]
    • SODIUM SILICOFLUORIDE [MART.]
    • SODIUM HEXAFLUOROSILICATE [HSDB]
    • NCGC00255590-01
    • SODIUM SILICON FLUORIDE (NA2SIF6)
    • CAS-16893-85-9
    • DISODIUM HEXAFLUOROSILICATE (NA2SIF6)
    • NS00084852
    • Sodium fluorosilicate [UN2674] [Poison]
    • C19040
    • EC 240-934-8
    • F007281
    • Q532908
    • 16893-85-9

  • Applications

    Sodium hexafluorosilicate (CAS 16893-85-9) is used as a fluoride source in municipal water fluoridation programs and as a fluoride additive in dental care products; it also functions as a fluxing agent in glass and ceramic production, and has been used as an ingredient in some rodenticide formulations in agriculture; it may also serve as an intermediate in the synthesis of other fluorinated compounds.

    gpt-5-nano

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction