Thymine is a pyrimidine nucleobase that is uracil in which the hydrogen at position 5 is replaced by a methyl group.
How much products actually contain
No product states its amount yet.
Of the products containing it, 1 list it before the 1% line and 0 after it (usually 1% or less).
Products using this ingredient
1 of 1 confirmed · likeliest to carry enough first
Definition
Thymine is a pyrimidine nucleobase that is uracil in which the hydrogen at position 5 is replaced by a methyl group. It has a role as a mouse metabolite, an Escherichia coli metabolite and a human metabolite. It is a pyrimidine nucleobase and a pyrimidone.
Source: PubChem
US FDA substance register · UNII QR26YLT7LT · registered name THYMINE · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
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 チミン: 本品は、次の化学式で表される複素環式化合物である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 65-71-4
- EC No.EU chemical inventory number
- 200-616-1
- DTXSIDUS EPA chemical ID
- DTXSID4052342
- DTXCIDUS EPA compound ID
- DTXCID4030914
- IUPAC
- 5-Methylpyrimidine-2,4(1H,3H)-dione
- Molecular formula
- C5H6N2O2
- Molecular weight
- 126.115 g/mol
Measured properties
- Appearance
- Solid, [Merck Index] White crystalline powder, [Alfa Aesar MSDS] · Solid
- Melting point
- 316 °C · 320 °C
- Solubility
- 3820 mg/L (at 25 °C) · 3.82 mg/mL
- Colour
- white
- Melting/freezing point
- 316 ℃
- Initial boiling point and range
- 389 ℃
- Flash point
- 335 ℃
- Vapour pressure
- 0.00000133 ㎜Hg (25℃)
- Water solubility
- 3820 ㎎/ℓ (25℃)
- Relative density
- 1.454 (g/cm3, 25℃)
- n-Octanol/water partition coefficient (Kow)
- -0.62
- Molecular weight
- 126.11
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 1 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.
- Softener and conditioner1
Source: US EPA CompTox dashboard
Related literature
- How Does Thymine DNA Survive Ultrafast Dimerization Damage? · 2016
- Solid-State Photochemical Reaction of Multisubstituted Thymine Derivatives · 2016
- Formation of cyclobutane thymine dimers by tiaprofenic acid and its photoproducts: approach to the photosensitizer triplet state energy limit value · 2015
- On the Formation of Thymine Photodimers in Thymine Single Strands and Calf Thymus DNA · 2014
- Computer simulation for photo damage and self-repair of thymine · 2011
Linked databases 20
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- PubChem 2
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese