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COSMETIC GRADE TITANIUM DIOXIDE AMA99
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zeolite 4A
Solvent Red 24
Product Name: Solvent Red 24 / Sudan IV / Oil Red RR
Chemical Name: 1-[[2-Methyl-4-[(2-methylphenyl)azo]phenyl]azo]-2-naphthalenol
Color Index: C.I. 26105
CAS: 85-83-6
Molecular Formula: C₂₄H₂₀N₄O
Formula Weight: 380.44 – 380.45 g/mol
Synonyms: Sudan IV; Oil Red IV; Biebrich Scarlet R; Candle Scarlet G; Oil Red S; Oil Red RR; 1-(4-o-Tolylazo-o-tolylazo)-2-naphthol; C.I. 26105
Application:
Plastics (PS, PVC, PMMA), Oils & Fats, Waxes, Candles, Rubber Toys, Printing Inks, Wood Stains, Shoe & Floor Polishes, Petroleum Products, Hydrocarbon Solvents, Biological Staining (Lipids & Fats)
Description
marker
1.Product Description
Achieve Brilliant, Oil-Soluble Red Coloration with Solvent Red 24 – The Versatile Disazo Dye for Plastics, Oils, and Specialty Applications.
Solvent Red 24, internationally designated as C.I. 26105 and widely known as Sudan IV or Oil Red RR, is a high-performance disazo solvent dye renowned for its brilliant reddish-bluish red hue, excellent oil solubility, and superior compatibility with hydrocarbon systems . This sophisticated dye features a complex disazo molecular structure that delivers exceptional solubility in non-polar solvents and outstanding color strength across diverse applications.
What distinguishes Solvent Red 24 from conventional solvent dyes is its exceptional combination of oil solubility, heat resistance, and versatility. With a melting point ranging from 165°C to 199°C depending on grade and purity, this dye maintains its vibrant color through processing while demonstrating good heat resistance up to 250°C in polystyrene applications . Its lightfastness rating of 5-6 (on an 8-point scale) ensures durable coloration in end-use products .
Key differentiators:
Disazo Chemistry: Provides superior oil solubility and excellent compatibility with non-polar solvents and hydrocarbon systems .
Excellent Oil & Fat Solubility: Highly soluble in oils, fats, waxes, and hydrocarbon solvents; soluble in benzene (50g/L), toluene (37.3g/L), and acetone (20.2g/L) .
Good Heat Resistance: Withstands processing temperatures up to 250°C in PS, suitable for injection molding and extrusion applications .
Brilliant Reddish-Bluish Shade: Delivers a vibrant, transparent reddish-bluish red hue with excellent color strength .
Versatile Application Range: Suitable for plastics, oils, waxes, candles, printing inks, rubber toys, wood stains, and biological staining .
2. Product Specifications (Technical Data Sheet)
| Property | Specification | Insight |
| Product Name | Solvent Red 24 (C.I. 26105) | Premium disazo solvent dye for oil-based applications |
| Appearance | Dark red to reddish-brown to blackish red powder | Free-flowing, uniform powder |
| CAS No. | 85-83-6 | Verified chemical registry number |
| EINECS/EC No. | 201-635-8 | Listed in European inventory |
| Molecular Formula | C₂₄H₂₀N₄O | Disazo structure with naphthol group |
| Formula Weight | 380.44 - 380.45 g/mol | |
| Solubility | Insoluble in water; soluble in oils, fats, waxes, hydrocarbons; acetone (20.2 g/L), toluene (37.3 g/L), xylene (10 g/L), benzene (50 g/L), dichloromethane (32.8 g/L), ethanol (12.1 g/L) | Excellent solubility in non-polar and aromatic solvents |
| Style | Solvent Dye / Disazo | Non-ionic, oil-soluble colorant |
| Color Shade | Reddish-bluish red | Transparent, brilliant red with blue undertone |
| Tinting Strength | High | Strong coloration with minimal dosage |
| Purity | ≥ 90% - 99% (varies by grade) | Multiple grades available for industrial and research applications |
| Melting Point | 165-199°C (varies by grade and purity) | Good thermal stability for processing |
| Lightfastness | 5-6 (1-8 scale) | Good UV resistance for indoor applications |
| Heat Resistance (PS) | 250°C | Suitable for polystyrene processing |
| Density | 0.33 - 1.2 g/cm³ | |
| pH (1% solution) | 7-8 | Neutral, stable in most formulations |
| Acid/Alkali Resistance | Unaffected by 5% HCl and 5% Na₂CO₃ | Good chemical stability |
| Absorption Maximum (λmax) | 357 nm, 520 nm | Characteristic absorption peaks for quality verification |
| Storage Conditions | Store in cool, dry, well-ventilated area; keep containers tightly closed; avoid incompatible substances (strong oxidizers) | Shelf life: 2-5 years under proper storage |
| Packing | 25 kg fiber drums / cardboard cartons with PE inner liner; custom sizes available | Secure, moisture-proof packaging |
| Application | PS, PVC, PMMA, oils, fats, waxes, candles, rubber, inks, wood stains, biological staining | Versatile across multiple industries |
3.Product Application
Plastics & Thermoplastics – Primary Application:
Solvent Red 24 is widely used for coloring various plastic materials, delivering excellent transparency and heat stability :
| Polymer Substrate | Recommended Dosage | Processing Temperature | Performance Notes |
| Polystyrene (PS) | Transparent: 0.025%; Opaque: 0.05% + TiO₂ | Up to 250°C | Excellent transparency and heat resistance |
| Rigid PVC (RPVC) | 0.05-0.2% | Up to 200°C | Good compatibility with plasticizers |
| PMMA (Acrylic) | 0.05-0.15% | Up to 230°C | Suitable for transparent applications |
| Rubber & Rubber Toys | 0.05-0.2% | — | Provides vibrant coloring |
Oils, Fats, Waxes & Candles:
Solvent Red 24 is the preferred colorant for oil-based and fatty substrates :
Candles: Provides uniform, vibrant red coloration throughout the wax matrix
Oils & Fats: Colors petroleum products, greases, and edible oils (technical grade only)
Waxes: Used in shoe and floor polishes for aesthetic coloring
Printing Inks & Wood Stains:
The dye's excellent solubility in organic solvents makes it ideal for specialty ink applications :
Printing Inks: Suitable for solvent-based ink systems and writing inks
Wood Stains: Provides transparent reddish coloration for wood finishing products
Biological Staining & Research:
Solvent Red 24 (Sudan IV) is extensively used in biological and histological applications :
Lipid & Fat Staining: Used to stain triglycerides, lipids, and lipoproteins in cells and tissues
Biological Research: Staining of frozen sections and formalin-fixed tissues for lipid visualization
4.Our advantage:
1) Provide free samples for testing or comparing the effect difference and cost performance.
2) Fast response speed, customers' questions at any time will be responded to in two hours.
3) Fast delivery: the fastest delivery can be made on the same day.
4)Different packaging solutions: provide various packaging options according to customer requirements.
5)Technical guidance: provide improved whitening and coloring formulas and guidance according to customer production materials.
6) Sample retention or sample mailing before bulk delivery.
7) Providing certificationes, such as Reach certification.
8) Different payment methods: TT LC, etc.
9) Providing door-to-door DDP service.
5.Packing information:
Usually is 25Kg/drum or paper box or bag with inner double PE liner Or provide customized packaging according to customer requirements
Contact Us
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