Ingredient Dictionary

SODIUM METASILICATE

Sodium silicate is an inorganic sodium salt having silicate as the counterion.

How much products actually contain

No product states its amount yet.

Of the products containing it, 2 list it before the 1% line and 0 after it (usually 1% or less).

Products using this ingredient

2 of 2 confirmed · likeliest to carry enough first

Definition

Sodium silicate is an inorganic sodium salt having silicate as the counterion. It contains a silicate ion.

Source: PubChem

US FDA substance register · UNII 052612U92L · registered name SODIUM METASILICATE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Prevents corrosion of packaging and equipmentANTICORROSIVEBinds metal ions to prevent spoilageCHELATINGKeeps pH steadyBUFFERING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

Reviewed by CIR: Amended Safety Assessment of Silicates as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of Potassium Silicate, Sodium Metasilicate, and Sodium Silicate

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name メタケイ酸Ｎａ: 本品は、次の化学式で表されるナトリウム塩である。

Source: JCIA labelling names (Japan)

Names & identifiers

SODIUM METASILICATEINCI소듐메타실리케이트Korean label name (MFDS standard)Silicic acid (H2SiO3), disodium saltSynonymメタケイ酸ＮａJapanese labelling name

CAS No.chemical registry number: 6834-92-0
EC No.EU chemical inventory number: 229-912-9
DTXSIDUS EPA chemical ID: DTXSID7029669
DTXCIDUS EPA compound ID: DTXCID509669

IUPAC: Disodium oxosilanebis(olate)
Molecular formula: Na2O3Si
Molecular weight: 122.062 g/mol

Measured properties

pH: 12.6
Melting/freezing point: 1088 ℃
Vapour pressure: 5.01E-17 ㎜Hg (25℃ (est.))
Water solubility: 100 g/100㎖ (25℃ (est.))
Relative density: 2.4
n-Octanol/water partition coefficient (Kow): -5.65 (est.)
Molecular weight: 122.06

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea)

What products actually use it for

What the 292 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Chelating agent160
Corrosion inhibitor55
pH regulating agent21
Anti-redeposition agent19
Cleaning agent8
Processing aids not otherwise specified5
Intermediate4
Surfactant (surface active agent)3

13 other uses

Swelling agent2
Solids separation (precipitating) agent, not other2
Solvent2
Plating agent2
Filler1
Fragrance1
Etching agent1
Adhesion/cohesion promoter1
Lubricating agent1
Dispersing agent1
Surface modifier1
Catalyst1
Emulsifier1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

12 skin studies and 2 eye studies are on record.

Classed as highly irritating1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 14 studies

Skin corrosion/irritation - Category 1
Skin Irritation · Screening
Skin corrosion - category 1
Skin Irritation · Screening
Skin Corr. 1B
Skin Irritation · Authoritative
Category 1
Skin Irritation · Screening
Moderate or Mild Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Severe Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Corrosive
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Category 8.2C (Category 1C)
Skin Irritation · Read Across
Corrosive
skin corrosion: in vitro / ex vivo · Screening · EU Method B.40 (In Vitro Skin Corrosion: Transcutaneous Electrical Resistance Test (TER)) equivalent or similar to
Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
Classification not possible
Skin Sensitization · Screening
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Category 8.3A (Category 1)
Eye Irritation · Read Across
Category 1
Eye Irritation · Screening