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Ingredients

Ingredient Dictionary

GUANINE

Guanine is a 2-aminopurine carrying a 6-oxo substituent.

Molecular structure

Definition

US FDA substance register · UNII 5Z93L87A1R · registered name Guanine · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Guanine is a 2-aminopurine carrying a 6-oxo substituent. It has a role as a mouse metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a human metabolite and an algal metabolite. It is a member of 2-aminopurines, an oxopurine and a purine nucleobase. It derives from a hydride of a 9H-purine.

Source: PubChem

Guanine is a natural purine that conforms to the formula:

Cosmetic roles

Makes a clear formula opaqueOPACIFYINGAdds colourCOLORANT

Safety & regulatory references

Restricted
ASEAN · China · European Union · South Korea · Taiwan
Allowed colourant
ASEAN · Taiwan

Source: MFDS (Korea) cosmetic regulatory information · ASEAN Cosmetic Directive · Taiwan FDA cosmetic ingredients · US FDA color additives · US FDA prohibited and restricted ingredients

Argentina · Brazil

  • Field of application and/or use : Dye Substances allowed for all kinds of products.

United States

  • Eye Area : Yes
  • Generally (Includes Lipsticks) : Yes
  • External Use : Yes

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)

EU Cosmetics Regulation, Annex IV (allowed colourants), entry 113

Source: EU allowed colourants (Annex IV)

Restriction IV/113

Source: EU CosIng ingredient list

Restriction IV/113 · Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

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

Official labels & definitions

JCIA labelling name グアニン: 本品は、次の化学式で表される天然のプリン塩基である。

Source: JCIA labelling names (Japan)

Names & identifiers

GUANINEINCI구아닌Korean label name (MFDS standard)6H-Purin-6-one, 2-amino-1,9-dihydro-SynonymCI 75170SynonymグアニンJapanese labelling name
CAS No.chemical registry number
73-40-5
EC No.EU chemical inventory number
200-799-8
DTXSIDUS EPA chemical ID
DTXSID9052476
DTXCIDUS EPA compound ID
DTXCID6031049
IUPAC
2-Amino-1,9-dihydro-6H-purin-6-one
Molecular formula
C5H5N5O
Molecular weight
151.129 g/mol

Measured properties

Appearance
solid
Colour
white
Vapour pressure
0.000000000096 ㎜Hg (@ 25 ℃, est.)
Water solubility
2080 ㎎/ℓ (@ 37 ℃)
Vapour density
5.22
Relative density
1.67
n-Octanol/water partition coefficient (Kow)
-0.91
Decomposition temperature
360 ℃
Molecular weight
151.13

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 9 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.

  • Dye7
  • Opacifer2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

1 skin studies and 1 eye studies are on record.

Classed as moderate1

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
  • Category 6.3A (Category 2)
    Skin Irritation · Read Across
  • Category 6.4A (Category 2A)
    Eye Irritation · Read Across

Source: US EPA CompTox dashboard

Related literature

Linked databases 26