Definition
US FDA substance register · UNII L4SQI4K87S · registered name SOLVENT YELLOW 18 · single chemical substance
Cosmetic roles
Safety & regulatory references
- Allowed colourant
- United States
Source: US FDA color additives · US FDA prohibited and restricted ingredients
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 6407-78-9
- EC No.EU chemical inventory number
- 229-043-5
- DTXSIDUS EPA chemical ID
- DTXSID10863784
- DTXCIDUS EPA compound ID
- DTXCID60812363
- IUPAC
- 4-[(2,4-Dimethylphenyl)diazenyl]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one
- Molecular formula
- C18H18N4O
- Molecular weight
- 306.369 g/mol
Measured properties
- Melting/freezing point
- 169~170.5 ℃ (101.3kPa)
- Initial boiling point and range
- 465.48 ℃(101.3kPa)
- Flash point
- 250 ℃(98.09kPa)
- Vapour pressure
- 0 ㎩ (25℃)
- Water solubility
- 62.94 g/㎖ (25℃)
- Relative density
- 1.19 (20℃)
- n-Octanol/water partition coefficient (Kow)
- 5.645 (25℃)
- Molecular weight
- 306.369
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 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.
- Dye1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
1 skin studies and 1 eye studies are on record.
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
- Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline: as mentioned below - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: as mentioned below according to
Source: US EPA CompTox dashboard
Linked databases 12
- Australian Industrial Chemicals Inventory (AICIS)
- EU CosIng ingredient list 2
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA color additives
- US FDA prohibited and restricted ingredients
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata