Solvent Red 24

Solvent Red 24 Basic information
Product Name:Solvent Red 24
Synonyms:1-((2-Methyl-4-((2-methylphenyl)azo)phenyl)azo)-2-naphthalenol;1-((4-(o-tolylazo)-o-tolyl)azo)-2-naphtho;1-((E)-(2-Methyl-4-[(E)-(2-methylphenyl)diazenyl]phenyl)diazenyl)-2-naphth;1-(4-(o-Tolylazo)-o-tolylazo)-2-naphthol;1-(4-o-tolylazo-o-tolylazo)-2-naphthol;1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-2-naphthaleno;2′,3-Dimethyl-4-(2-hydroxynaphthylazo)azobenzene;2’,3-dimethyl-4-(2-hydroxynaphthylazo)azobenzene
CAS:85-83-6
MF:C24H20N4O
MW:380.44
EINECS:201-635-8
Product Categories:Solvents and Intermediates;Azo;Organics;Solvent Dyestuff;Aromatics;Intermediates & Fine Chemicals;Pharmaceuticals
Mol File:85-83-6.mol
Solvent Red 24 Structure
Solvent Red 24 Chemical Properties
Melting point 199 °C (dec.)(lit.)
Boiling point 260°C
density 1.1946 (rough estimate)
vapor pressure 0Pa at 25℃
refractive index 1.6000 (estimate)
storage temp. Flammables area
solubility Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol
pka13.52±0.50(Predicted)
Colour Index 26105
form Powder/Solid
color Red Brown
Water Solubility 23μg/L at 25℃
λmax520 nm, 357 nm
Merck 14,8393
BRN 709018
Stability:Stable. Incompatible with strong oxidizing agents.
Biological ApplicationsDetecting atherosclerosis; diapers; skin care products; shampoos; hair colors; stents; dental impression materials
InChIKeyRCTGMCJBQGBLKT-PAMTUDGESA-N
LogP6.66
IARC3 (Vol. 8, Sup 7) 1987
NIST Chemistry ReferenceO-tolylazo-o-tolylazo-beta-naphthol(85-83-6)
EPA Substance Registry SystemC.I. Solvent Red 24 (85-83-6)
Safety Information
Hazard Codes Xi,T
Risk Statements 36/38-45
Safety Statements 26-36-53-45
WGK Germany 3
RTECS QL5775000
TSCA Yes
HazardClass IRRITANT
HS Code 32129000
MSDS Information
ProviderLanguage
C.I. 26105English
SigmaAldrichEnglish
ACROSEnglish
ALFAEnglish
Solvent Red 24 Usage And Synthesis
Chemical Propertiesdark red to brown crystals or powder
UsesSolvent Red 24 has been used to promote wound healing and biological stain.
UsesIt has been used to promote wound healing. Biological stain. Dyes and metabolites, Environmental Testing.
UsesFat stain.
Preparation2-Methyl-4-(o-tolyldiazenyl)benzenamine diazotization, and Naphthalen-2-ol coupling.
DefinitionChEBI: A bis(azo) compound that is 2-naphthol substituted at position 1 by a {2-methyl-4-[(2-methylphenyl)diazenyl]phenyl}diazenyl group. A fat-soluble dye predominantly used for demonstrating triglycerides in frozen sections, but which may also stain some protei bound lipids in paraffin sections.
General DescriptionSudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red color. The dye does not stain lipid droplets or phospholipids.
Flammability and ExplosibilityNotclassified
Safety ProfileQuestionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.
Purification MethodsCrystallise the dye from EtOH/water or acetone/water. [Beilstein 16 IV 249.]
Properties and Applicationsred to blue light red. Red powder, resistance to 5% of hydrochloric acid and sodium carbonate solution. Insoluble in water, soluble in ethanol and acetone, soluble in benzene. In concentrated sulfuric acid to blue light green, dilution have red precipitation. Mainly used in acetate fiber, organic glass, ABS resin, rigid polyvinyl chloride (PVC) and so on the many kinds of plastic coloring, and can also be used to paint and ballpoint ink color, also can be used for polyester fiber colouring.
StandardLight FastnessHeat-resistant(℃)waterSodium Carbonate(5%)Hydrochloric acid(5%)Melting pointStableISOGood184-185120InsolubleNo changeNo change
Solvent Red 24 Preparation Products And Raw materials
Raw materialsO-AMINOAZOTOLUENE–>2-Naphthol

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