Orange G is an organic sodium salt that is the disodium salt of 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonic acid.
Definition
Orange G is an organic sodium salt that is the disodium salt of 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonic acid. It is often combined with other yellow dyes in alcoholic solution to stain erythrocytes in trichrome methods, and is used for demonstrating cells in the pancreas and pituitary. It has a role as a histological dye. It contains a 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonate.
Source: PubChem
US FDA substance register · UNII 1Q6EJU80RN · registered name ORANGE G · single chemical substance
CI 16230 is classed chemically as a monoazo colour. It conforms to the formula:
Cosmetic roles
Safety & regulatory references
- Restricted
- ASEAN · China · Taiwan
- Allowed colourant
- ASEAN · Taiwan · United States
Source: MFDS (Korea) cosmetic regulatory information · ASEAN Cosmetic Directive · 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 34 · maximum concentration Not to be used in products applied on mucous membranes
Source: EU allowed colourants (Annex IV)
Restriction IV/34 · 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
- 1936-15-8
- EC No.EU chemical inventory number
- 217-705-6
- DTXSIDUS EPA chemical ID
- DTXSID6021082
- DTXCIDUS EPA compound ID
- DTXCID801474349
- IUPAC
- Disodium 7-hydroxy-8-(phenyldiazenyl)naphthalene-1,3-disulfonate
- Molecular formula
- C16H10N2Na2O7S2
- Molecular weight
- 452.36 g/mol
Measured properties
- Appearance
- C.i. acid orange 10 appears as orange microcrystals or powder. (NTP, 1992)
- Melting point
- 572 to 707 °F (decomposes) (NTP, 1992)
- Solubility
- 50 to 100 mg/mL at 74.3 °F (NTP, 1992)
- Water solubility
- 80000 ㎎/ℓ (at 25C)
- Relative density
- 0.45-0.47 ()
- n-Octanol/water partition coefficient (Kow)
- -4.56 ((est.))
- Molecular weight
- 452.38
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 2 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.
- Dye2
Source: US EPA CompTox dashboard
Linked databases 22
- ASEAN Cosmetic Directive
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU allowed colourants (Annex IV)
- EU CosIng ingredient list 2
- IARC carcinogen classification
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic regulatory information 2 3 4
- PubChem 2
- Taiwan FDA cosmetic ingredients
- 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)
- US National Toxicology Program reports
- Wikidata
- Wikipedia · English · Japanese · Chinese