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Ingredient Dictionary

SODIUM BENZOATE

Sodium benzoate is an organic sodium salt resulting from the replacement of the proton from the carboxy group of benzoic acid by a sodium ion.

Molecular structure

How much products actually contain

8 products state the amountmedian 0.45%

  • under 0.01% 3
  • 0.01–0.1% 1
  • 0.1–1% 4
  • 1% or more 0

Amounts are mostly stated by products named after the ingredient, so they may lean towards token amounts.

Of the products containing it, 0 list it before the 1% line and 2,517 after it (usually 1% or less).

Products using this ingredient

12 of 2,517 confirmed · likeliest to carry enough first · See all 2,517

Definition

Sodium benzoate is an organic sodium salt resulting from the replacement of the proton from the carboxy group of benzoic acid by a sodium ion. It has a role as an EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor, an EC 3.1.1.3 (triacylglycerol lipase) inhibitor, an antimicrobial food preservative, a plant metabolite, a human xenobiotic metabolite, an algal metabolite and a drug allergen. It contains a benzoate.

Source: PubChem

US FDA substance register · UNII OJ245FE5EU · registered name Sodium benzoate · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Sodium Benzoate is the sodium salt of benzoic acid that conforms to the formula:

Cosmetic roles

Listed as a fragrance-composition material (not a claim that it adds scent)FRAGRANCEPrevents corrosion of packaging and equipmentANTICORROSIVEStops microbes growing in the productPRESERVATIVE

Safety & regulatory references

Restricted
China · Japan · South Korea · Taiwan

Source: MFDS (Korea) cosmetic regulatory information

Argentina · Brazil

  • Maximum concentration permitted at final product : a) rinse-off products, except oral care products: 2,5% (acid) b) Products for oral hygiene: 1.7% (acid) c) Products not rinsed: 0.5% (acid)
  • Other limitations and requirements : Banned in sprayable systems (such as aerosols and sprays) when the concentration is greater than 0.5%.

ASEAN

  • Maximum authorised concentration in the finished cosmetic product : Rinse off products, except oral care products; 2.5 %(acid) Oral care products; 1.7%(acid) Leave-on products; 0.5%(acid)

European Union

  • Product Type, body parts : a) Rinse-off products, except oral care products b) Oral care products c) Leave-on products
  • Maximum concentration in ready for use preparation : a) 2.5% (acid) b) 1.7% (acid) c) 0.5% (acid)

Source: MFDS (Korea) cosmetic regulatory information

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

Source: Korea toxic substances GHS register (NIER)

Restriction V/1 · Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

Reviewed by CIR: Benzyl Alcohol, Benzoic Acid, Sodium Benzoate

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of Benzyl Alcohol, Benzoic Acid, and Sodium Benzoate

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Safety Assessment of Benzyl Alcohol, Benzoic Acid and its Salts, and Benzyl Benzoate

Source: US Cosmetic Ingredient Review (CIR)

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

Official labels & definitions

JCIA labelling name 安息香酸Ｎａ: 本品は、安息香酸（＊）のナトリウム塩であり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

SODIUM BENZOATEINCI소듐벤조에이트Korean label name (MFDS standard)Benzoic acid, sodium salt (1:1)Synonym安息香酸ＮａJapanese labelling name
CAS No.chemical registry number
532-32-1
EC No.EU chemical inventory number
208-534-8
DTXSIDUS EPA chemical ID
DTXSID1020140
DTXCIDUS EPA compound ID
DTXCID90140
IUPAC
Sodium benzoate
Molecular formula
C7H5NaO2
Molecular weight
144.105 g/mol

Measured properties

Appearance
Dry Powder, Large Crystals, CBI, Liquid, Wet Solid, Other Solid · A white, almost odourless, crystalline powder or granules
Odour
Odorless · odourless
Boiling point
>450 °C to <475 °C, decomposes with no boiling (OECD Guideline 103 (Boiling point/boiling range))
Melting point
for benzoic acidMelting range of benzoic acid isolated by acidification and not recrystallised 121,5 °C to 123,5 °C, after drying in a sulphuric acid desiccator · 436 °C (OECD Guideline 102 (Melting point / Melting Range))
Solubility
Freely soluble in water, sparingly soluble in ethanol · In water, 556 g/L (temperature and pH not reported)
Density
1.50 g/cu cm (OECD Guideline 109 (Density of Liquids and Solids)) · Relative density (water = 1): 1.44
Stability
Stable under recommended storage conditions.
pH
Aqueous solution is slightly alkaline to litmus, pH about 8 · 8
Colour
white
Melting/freezing point
&amp, gt, 300 ℃
Initial boiling point and range
464.9 ℃(at 1013hPa)
Flash point
&amp, gt, 100 ℃
Vapour pressure
(&amp, lt, 0.001hPa at 20 ℃)
Water solubility
63 g/100㎖ (at 20 ℃)
Relative density
1.44
n-Octanol/water partition coefficient (Kow)
-2.27 (calc.)
Auto-ignition temperature
(&amp, gt, 500 ℃)
Molecular weight
144.11

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 548 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.

  • Preservative400
  • Processing aids not otherwise specified60
  • Corrosion inhibitor30
  • Biocide12
  • pH regulating agent8
  • Antioxidant4
  • Crystal growth modifiers (nucleating agents)3
  • Food preservative (EPA)3
18 other uses
  • Pharmaceutical (EPA)3
  • Fragrance2
  • Lubricating agent2
  • Surface modifier2
  • Flavouring and nutrient2
  • Surfactant (surface active agent)2
  • Emulsifier2
  • Deodorizer2
  • Pigment2
  • Stabilizing agent1
  • Adhesion/cohesion promoter1
  • Dye1
  • Flocculating agent1
  • Abrasive1
  • Soil amendments1
  • Defoamer1
  • Cleaning agent1
  • No specific technical function1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

1 skin studies and 1 eye studies are on record.

Classed as low1

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 2 studies
  • Studies Indicate No Significant Irritation
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
  • Moderate or Mild Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to

Source: US EPA CompTox dashboard

Related literature

Linked databases 22

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