Woodstain scarlet is an organic sodium salt that is the disodium salt of 7-hydroxy-8-{[4-(phenyldiazenyl)phenyl]diazenyl}naphthalene-1,3-disulfonic acid.
Definition
Woodstain scarlet is an organic sodium salt that is the disodium salt of 7-hydroxy-8-{[4-(phenyldiazenyl)phenyl]diazenyl}naphthalene-1,3-disulfonic acid. Occasionally used for the demonstration of muscle fibres in conjunction with, or as a replacement for, acid fuchsin. It has a role as a histological dye. It contains a 7-hydroxy-8-{[4-(phenyldiazenyl)phenyl]diazenyl}naphthalene-1,3-disulfonate.
Source: PubChem
US FDA substance register · UNII 5PLA82FV3C · registered name ACID RED 73 · single chemical substance
Cosmetic roles
Safety & regulatory references
- Banned
- Argentina · ASEAN · Brazil · China · European Union · South Korea · Taiwan · United Kingdom
- Allowed colourant
- United States
Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · MFDS (Korea) cosmetic regulatory information · Taiwan FDA cosmetic ingredients · UK cosmetics regulations (OPSS) · US FDA prohibited and restricted ingredients
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
EU Cosmetics Regulation, Annex II (prohibited substances), entry 1233
Restriction II/1233
Source: EU CosIng ingredient list
Restriction II/1233 · Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 5413-75-2
- EC No.EU chemical inventory number
- 226-502-1
- DTXSIDUS EPA chemical ID
- DTXSID1041712
- DTXCIDUS EPA compound ID
- DTXCID9021712
- IUPAC
- Disodium 7-hydroxy-8-[(E)-{4-[(E)-phenyldiazenyl]phenyl}diazenyl]naphthalene-1,3-disulfonate
- Molecular formula
- C22H14N4Na2O7S2
- Molecular weight
- 556.47 g/mol
Measured properties
- n-Octanol/water partition coefficient (Kow)
- 0.94
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 3 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.
- Dye3
Source: US EPA CompTox dashboard
Related literature
Linked databases 20
- ASEAN Cosmetic Directive
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- EU CosIng ingredient list 2 3
- EU Cosmetics Regulation
- EU prohibited substances (Annex II)
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic regulatory information 2 3
- PubChem
- Taiwan FDA cosmetic ingredients
- Tlooto literature search
- UK cosmetics regulations (OPSS)
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA prohibited and restricted ingredients
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata