Naphthol green B is an organic sodium salt composed of iron(3+), sodium and 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate ions in a 1:1:3 ratio.
Definition
US FDA substance register · UNII W60I5H3VMQ · registered name ACID GREEN 1 · single chemical substance
Naphthol green B is an organic sodium salt composed of iron(3+), sodium and 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate ions in a 1:1:3 ratio. Used to stain collagen and animal tissue. It has a role as a histological dye. It is an iron coordination entity and an organic sodium salt. It contains a 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate.
Source: PubChem
CI 10020 is classed chemically as a nitroso colour. It conforms to the formula:
Cosmetic roles
Safety & regulatory references
- Banned
- ASEAN · United Kingdom
- Restricted
- ASEAN · China · Japan · South Korea · Taiwan
- Allowed colourant
- ASEAN · Taiwan · United States
Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · MFDS (Korea) cosmetic regulatory information · UK cosmetics regulations (OPSS) · Taiwan FDA cosmetic ingredients · US FDA prohibited and restricted ingredients
Argentina · Brazil
- Field of application and/or use : Dye Substances allowed exclusively in products that do not have contact with mucosa in regular and predictable use conditions.
European Union
- Product Type, body parts : Not to be used in products applied on mucous membranes
Source: MFDS (Korea) cosmetic regulatory information
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
EU Cosmetics Regulation, Annex IV (allowed colourants), entry 2 · maximum concentration Not to be used in products applied on mucous membranes
Source: EU allowed colourants (Annex IV)
EU Cosmetics Regulation, Annex II (prohibited substances), entry 1342
Restriction II/1342 (Acid Green 1; CI 10020: when used as a substance in hair dye products)
Source: EU CosIng ingredient list
Restriction IV/2 (CI 10020) II/1342 (Acid Green 1; CI 10020: when used as a substance in hair dye products)
Source: EU CosIng ingredient list
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name 緑４０１: 本品は、昭和41年厚生省令第30号に示される緑色401号である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 19381-50-1
- EC No.EU chemical inventory number
- 243-010-2
- DTXSIDUS EPA chemical ID
- DTXSID4044406
- DTXCIDUS EPA compound ID
- DTXCID2024406
- IUPAC
- Iron(3+) sodium 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate (1/3/3)
- Molecular formula
- C30H15FeN3Na3O15S3
- Molecular weight
- 878.45 g/mol
What products actually use it for
What the 7 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.
- Dye6
- Soil amendments1
Source: US EPA CompTox dashboard
Linked databases 24
- ASEAN Cosmetic Directive
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- China inventory of existing ingredients (IECIC)
- EU allowed colourants (Annex IV)
- EU CosIng ingredient list 2 3
- EU Cosmetics Regulation
- EU prohibited substances (Annex II)
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- MFDS (Korea) cosmetic ingredient register
- MFDS (Korea) cosmetic regulatory information 2 3 4
- PubChem
- Taiwan FDA cosmetic ingredients
- 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
- Wikipedia · English · Japanese