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Ingredient Dictionary

SODIUM BICARBONATE

Molecular structure

How much products actually contain

3 products state the amountmedian 1%

  • under 0.01% 0
  • 0.01–0.1% 0
  • 0.1–1% 1
  • 1% or more 2

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

Of the products containing it, 56 list it before the 1% line and 37 after it (usually 1% or less).

Products using this ingredient

12 of 93 confirmed · likeliest to carry enough first · See all 93

Definition

US FDA substance register · UNII 8MDF5V39QO · registered name Sodium bicarbonate · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Keeps pH steadyBUFFERINGReduces body odourDEODORANTCares for the mouthORAL CAREProtects skin from outside irritantsSKIN PROTECTINGScrubs physicallyABRASIVE

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: Re-review Summary of Sodium Sesquicarbonate, Sodium Carbonate and Sodium Bicarbonate as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Annual Review of Cosmetic Ingredient Safety Assessments - 2004/2005

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of Sodium Sesquicarbonate, Sodium Bicarbonate, and Sodium Carbonate

Source: US Cosmetic Ingredient Review (CIR)

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

Official labels & definitions

JCIA labelling name 炭酸水素Ｎａ: 本品は、炭酸のモノ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 BICARBONATEINCI소듐바이카보네이트Korean label name (MFDS standard)Carbonic acid, monosodium saltSynonym炭酸水素ＮａJapanese labelling name
CAS No.chemical registry number
144-55-8
EC No.EU chemical inventory number
205-633-8
DTXSIDUS EPA chemical ID
DTXSID9021269
DTXCIDUS EPA compound ID
DTXCID901269
IUPAC
Sodium hydrogen carbonate
Molecular formula
CHNaO3
Molecular weight
84.006 g/mol

Measured properties

Appearance
Sodium bicarbonate appears as odorless white crystalline powder or lumps. Slightly alkaline (bitter) taste. pH (of freshly prepared 0.1 molar aqueous solution): 8.3 at 77 °F. pH (of saturated solution): 8-9. Non-toxic. · Other Solid, Dry Powder, CBI, Large Crystals, Liquid
Odour
Odorless · odourless
Melting point
Decomposes at 228 °F (NTP, 1992) · Decomposes around 50 °C
Solubility
1 in 10 % at 77 °F (NTP, 1992) · 100000 mg/L (at 25 °C)
Density
2.159 (NTP, 1992) - Denser than water, will sink · 2.20 g/cu cm
Stability
Stable under recommended storage conditions. · Stable in dry air, but slowly decomposes in moist air
pH
Between 8,0 and 8,6 (1 % solution) · Freshly prepared 0.1 molar solution at 25 °C: 8.3
Dissociation constant
6.3
Colour
white
Vapour pressure
0.00000000373 ㎜Hg (at 25C)
Water solubility
(10% at 25C)
Relative density
2.159 ()
n-Octanol/water partition coefficient (Kow)
-4.01 ()
Decomposition temperature
50 ℃
Molecular weight
84.01

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 382 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 agent133
  • pH regulating agent109
  • Deodorizer53
  • Abrasive16
  • Processing aids not otherwise specified12
  • Pharmaceutical excipient (EPA)10
  • Cleaning agent6
  • Leavening agent (EPA)6
21 other uses
  • Flavouring and nutrient5
  • Foamant4
  • Degradant/impurity (EPA)3
  • Humectant3
  • Surfactant (surface active agent)2
  • Soil amendments2
  • Catalyst2
  • Surface modifier2
  • Thickening agent2
  • Intermediate1
  • Solids separation (precipitating) agent, not other1
  • Pharmaceutical disintegrant (EPA)1
  • Fragrance1
  • Emulsifier1
  • Solvent1
  • Adsorbent1
  • Chemical reaction regulator1
  • Pharmaceutical (EPA)1
  • Stabilizing agent1
  • Propellants, non-motive (blowing agents)1
  • Other1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 2 eye studies are on record.

Classed as moderate1Classed as low1

The studies disagree (the most common conclusion covers 50%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 5 studies
  • Classification not possible
    Skin Sensitization · Screening
  • Not classified
    Skin Irritation · Screening
  • Moderate or Mild Irritation
    skin irritation: in vivo · Screening · EPA OTS 798.4470 (Acute Dermal Irritation) according to
  • Not classified
    Eye Irritation · Screening
  • Moderate or Mild Irritation
    eye irritation: in vivo · Screening · EPA OTS 798.4500 (Acute Eye Irritation) according to

Source: US EPA CompTox dashboard

Related literature

Linked databases 21

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