Basic information
- CAS
3626-36-6- Standard SMILES
O=C(Nc1ccc2c(O)c(N=Nc3ccccc3)c(S(=O)(=O)[O-])cc2c1)Nc1ccc2c(O)c(N=Nc3ccccc3)c(S(=O)(=O)[O-])cc2c1.[Na+].[Na+]- InChIKey
DSARWKALPGYFTA-UHFFFAOYSA-L- Molecular formula
- C33H22N6Na2O9S2
- Average molar mass
- 756.7 g/mol
- Monoisotopic mass
- 756.06850721
Names & identifiers
- Preferred name
- C.I. Direct Orange 26
- IUPAC
- disodium;4-hydroxy-7-[(5-hydroxy-6-phenyldiazenyl-7-sulfonatonaphthalen-2-yl)carbamoylamino]-3-phenyldiazenylnaphthalene-2-sulfonate
- English name
- Direct Orange S
- Molecular formula
- C33H22N6Na2O9S2
- Molecular weight
- 756.67212
Names & synonyms
Direct Orange S3626-36-6Direct Orange 26Airedale Orange SEDAtlantic Fast Orange SAizen Primula Orange SHMM5GU9UN7KDirect Orange ABenzo Orange SC.I. Direct Orange 26Fast Orange SFenamin Orange A
Show more names
Fabramine OrangesMulticuer OrangesPyrazol Orange SEAizen Fast OrangesPamanil Oranges-26Chlorazol Orange RDycosdirect Oranges
Diphenyl Orange SEVondacel Orange SNErie Fast Orange ABenzo Fast Orange STertrodirect Orange SDiazol Fast Orange SDirect Fast Orange SNippon Fast Orange S
Database identifiers
- CAS
3626-36-6- PubChem CID
- 77182
- DTXSID
DTXSID30881400- UNII
- MM5GU9UN7K
- EC Number
- 222-838-8、685-098-9
Properties
Computed structural properties
- Topological polar surface area
- 262 Ų
- Hydrogen bond donors
- 4
- Hydrogen bond acceptors
- 13
- Rotatable bonds
- 6
- Heavy atoms
- 52
- Formal charge
- 0
- Complexity
- 1,310
Experimental & physicochemical properties
Physical DescriptionLiquid
Physicochemical properties
- Density
- 1.8 · 1.8[at 20℃]
- vapor pressure
- 0 Pa · 0Pa at 25℃
- Water Solubility
- 9.81 g/L · 9.81g/L at 20℃
- InChIKey
- DSARWKALPGYFTA-PYIFGEPISA-L
- SMILES
- C12=CC=C(NC(=O)NC3C=CC4=C(O)C(/N=N/C5C=CC=CC=5)=C(S([O-])(=O)=O)C=C4C=3)C=C1C=C(S([O-])(=O)=O)C(/N=N/C1=CC=CC=C1)=C2O.[Na+].[Na+]
- LogP
- -2.215 at · -2.215 at 20℃
- CAS DataBase Reference
- 3626 · 3626-36-6(CAS DataBase Reference)
- FDA UNII
- 5 GU9UN7K · MM5GU9UN7K
- EPA Substance Registry System
- 26 · C.I. Direct Orange 26 (3626-36-6)
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 315 · H315-H319
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 65% (13 of 20) of all reports.
Warning
H315 (25%): Causes skin irritation [Warning Skin corrosion/irritation]
P264, P264+P265, P280, P302+P352, P305+P351+P338, P321, P332+P317, P337+P317, and P362+P364 (click each P-code to see the statement)
Aggregated GHS information provided per 20 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Not Classified
Hazard information
Regulatory Information
Chemical: 2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)-, disodium salt
2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
REACH registered substance: Disodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate] (EC: 222-838-8)
2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)-, disodium salt: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
EPA Safer ChemicalChemical: C.I. Direct Orange 26
Hazard Classes and Categories
Skin Irrit. 2 (25%)
Not Classified
Safety data
Chemistry & industry
Uses & manufacturing
U.S. Production2023: <50,000 lb
Consumer UsesDye
Industry UsesDye
Use Classification
EPA Safer Chemical Functional Use Classes -> Colorants
Safer Chemical Classes -> Yellow triangle - The chemical has met Safer Choice Criteria for its functional ingredient-class, but has some hazard profile issues
General Manufacturing Information
Paper Manufacturing
2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2): ACTIVE
Applications
UsesDirect Orange 26 is an organic azo dye used with textiles. Being water soluble, Direct Orange 26 is a water pollutant, cleaned via reductive catalysis.
Upstream & downstream products
Upstream raw materials
Suppliers44 total
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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