Acid Red 26
Basic information
- CAS
3761-53-3- Standard SMILES
Cc1ccc(N=Nc2c(O)c(S(=O)(=O)[O-])cc3ccc(S(=O)(=O)[O-])cc23)c(C)c1.[Na+].[Na+]- InChIKey
DKUHOIWLFSTHJN-UHFFFAOYSA-L- Molecular formula
- C18H14N2Na2O7S2
- Average molar mass
- 480.4 g/mol
- Monoisotopic mass
- 480.0037817
Overview
C.i. food red 5 appears as dark red crystals or red powder. (NTP, 1992)
Names & identifiers
- Preferred name
- Acid Red 26
- IUPAC
- disodium;4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate
- English name
- Acid red 26
- Molecular formula
- C18H17N2NaO7S2
- Molecular weight
- 460.45
Names & synonyms
DTXSID8021228RefChem:1076034DTXCID3014743563761-53-34-((2,4-Dimethylphenyl)azo)-3-hydroxy-2,7-naphthalenedisulfonic acid, disodium saltAcid Red 26C.I. Food Red 5CHEBI:82369Ponceau de xylidinePonceau Red RXylidine Ponceau 2R (C.l. 16150)C.I. 16150,
Show more names
XYLIDINE PONCEAUredrAKA503c.i.79red101RPoncea1695redCI 16150ponceaugponceauj
Disodium;4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonateSCHEMBL133302SCHEMBL1637104D91977Disodium 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonatedisodium 4-[(E)-(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate
Database identifiers
- CAS
3761-53-3- PubChem CID
- 19579
- DTXSID
DTXSID8021228
Properties
Computed structural properties
- Topological polar surface area
- 176 Ų
- Hydrogen bond donors
- 1
- Hydrogen bond acceptors
- 9
- Rotatable bonds
- 2
- Heavy atoms
- 31
- Formal charge
- 0
- Complexity
- 791
Experimental & physicochemical properties
Chemical ClassesCarcinogens
Solubility1 to 10 mg/mL at 68 °F (NTP, 1992)
Melting Pointgreater than 572 °F (NTP, 1992)
Physical DescriptionC.i. food red 5 appears as dark red crystals or red powder. (NTP, 1992)
Physicochemical properties
- Melting point
- 300 ℃ · >300℃
- storage temp.
- Inert atmosphere,Room Temperature
- solubility
- DMSO (Slightly), Water (Slightly)
- Colour Index
- 16150 · 16150
- form
- Fine Powder
- color
- Dark red to bordeaux
- Water Solubility
- 10 mg/mL, · water: 10mg/mL, clear, red
- BRN
- 5709350 · 5709350
- Stability
- Hygroscopic
- Major Application
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Hazard information
Regulatory Information
Chemical: 2,7-Naphthalenedisulfonic acid, 4-[(2,4-dimethylphenyl)azo]-3-hydroxy-, disodium salt
2,7-Naphthalenedisulfonic acid, 4-(2,4-dimethylphenyl)azo-3-hydroxy-, disodium salt: Does not have an individual approval but may be used under an appropriate group standard
The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
Other Safety InformationIMAP assessments - Azo Dyes that Cleave to Aromatic Amines of Potential Toxicological Concern: Human health tier II assessment
Fire HazardsFlash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)
Health HazardsSYMPTOMS: Symptoms of exposure to this compound may include irritation.
Reactive GroupAzo, Diazo, Azido, Hydrazine, and Azide Compounds
Reactivity AlertsExplosive
Reactivity Profile
C.I. FOOD RED 5 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. This chemical is incompatible with strong oxidizing agents and strong acids (NTP, 1992).
Chemistry & industry
Uses & manufacturing
UsesSubstance listed with specific concentration in tattoo ink and/or permanent make up according to EU Commission Regulation 2020/2081. The concentration limit (by weight) is 0.1%.
Use Classification
Food Additives -> COLOUR -> JECFA Functional Classes
Food Additives -> COLOUR -> JECFA Functional Classes
General Manufacturing Information2,7-Naphthalenedisulfonic acid, 4-[2-(2,4-dimethylphenyl)diazenyl]-3-hydroxy-, sodium salt (1:2): ACTIVE
Applications
UsesA stain used in histology and in Masson’s trichrome stain.
UsesAcid Red 26 is an acid azo red dye used in inks and fabrics. Contributor to environmental pollution and textile effluents. Dyes and metabolites, Environmental Testing.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.
General DescriptionDark red crystals or red powder.
Preparation methods
Preparation2,4-Dimethylbenzenamine diazo, coupled with 3-Hydroxynaphthalene-2,7-disulfonic acid.
Upstream & downstream products
Upstream raw materials
Additional notes
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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