Production
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Pigment yellow 13
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Phthalocyanine blue 15-1
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Optical Brightener SWN
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Solvent Blue 122
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Sodium Alpha-olefin Sulfonate
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zeolite 4A
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Phthalocyanine blue 15-4
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Titanium Dioxide Masterbatch
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Optical Brightener ER-III
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Solvent Orange 63
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Acid Red 249
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Solvent Blue 45
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Solvent Violet 13
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Optical Brightener DMA-X
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Pigment red 48-2
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Solvent Red 135
Solvent Red 23
Product Name: Solvent Red 23 / Sudan III / C.I. 26100
Chemical Name: 1-[[4-(Phenylazo)phenyl]azo]-2-naphthalenol
/ 1-[4-(Phenylazo)phenylazo]-2-naphthol
Color Index: C.I. 26100
CAS: 85-86-9
Molecular Formula: C22H16N4O
Formula Weight: 352.39 g/mol
Synonyms: Sudan III; Cerasin Red; Sudan Red III; Fettscharlach; Oil Red AS; D&C Red No. 17; C.I. 26100; Solvent Red 23; Red 17; Fat Ponceau G
Application:
Plastics (PS, ABS, PMMA, Rigid PVC), Polyester Fibers (Terylene), Hydrocarbon Fuels & Oils, Waxes & Candles, Greases, Printing Inks, Wood Stains, Aluminum Foil & Hot Stamping Foils, Leather Finishes, Nail Polish, Hair Colorants, Ballpoint Pen Inks, Biological Staining (Lipids)
Description
marker
1.Product Description
Achieve Brilliant, Oil-Soluble Red Coloration with Solvent Red 23 -The Versatile Azo Dye for Plastics, Fuels, and Specialty Applications.
Solvent Red 23, internationally designated as C.I. 26100 and widely known as Sudan III or D&C Red No. 17, is a high-performance monoazo solvent dye renowned for its brilliant yellowish-red to reddish-brown hue, exceptional oil solubility, and versatile application range . This sophisticated dye features a distinctive azo molecular structure with a naphthol group that delivers superior solubility in non-polar systems and excellent compatibility with a wide range of hydrocarbon-based substrates .
What distinguishes Solvent Red 23 from conventional solvent dyes is its exceptional combination of oil solubility, heat resistance, and versatility. With a melting point of 199-205°C and heat resistance up to 250°C in polystyrene, this dye maintains its vibrant color through demanding injection molding, extrusion, and fiber spinning operations . Its lightfastness rating of 5-6 (on an 8-point scale) ensures durable coloration for interior and moderate-exposure applications .
Key differentiators:
Monoazo Chemistry: Provides excellent oil solubility and strong color strength with a brilliant yellowish-red shade .
Exceptional Hydrocarbon Solubility: Highly soluble in oils, fats, waxes, and non-polar solvents; soluble in benzene, chloroform, and DMSO .
Good Heat Resistance: Withstands processing temperatures up to 250°C in PS, suitable for plastics and fiber applications .
Versatile Application Range: Suitable for plastics, polyester fibers, fuels, waxes, printing inks, cosmetics, and biological staining .
Regulatory Status: Approved as D&C Red No. 17 for cosmetic use in the US; regulated under EU Cosmetics Regulation .
2.Specification:
| Property | Specification | Insight |
| Product Name | Solvent Red 23 (C.I. 26100) | Premium azo dye for oil-based and plastic applications |
| Appearance | Red-brown to dark red uniform powder | Free-flowing, fine powder |
| CAS No. | 85-86-9 | Verified chemical registry number |
| EINECS/EC No. | 201-638-4 | Listed in European inventory |
| MDL Number | MFCD00003905 | |
| Molecular Formula | C₂₂H₁₆N₄O | Azo structure with naphthol group |
| Formula Weight | 352.39 g/mol | |
| Solubility (Water) | Insoluble | Hydrophobic, ideal for non-polar systems |
| Solubility (DMSO) | 5 mg/mL (14.18 mM) | Good solubility for research applications |
| Solubility (Benzene/Chloroform) | Soluble | Excellent solubility in aromatic and chlorinated solvents |
| Solubility (Acetone) | 3.1 g/L | Moderate solubility in ketones |
| Solubility (Butyl Acetate) | 3.2 g/L | Suitable for ester-based systems |
| Solubility (Toluene) | 7.7 g/L | Limited aromatic solubility |
| Solubility (Ethanol) | 2.1 g/L | Slight alcohol solubility |
| Ionic Style | Non-ionic / Solvent Dye | Compatible with non-polar systems |
| Color Shade | Yellowish-red to reddish-brown | Transparent, brilliant red with yellow undertone |
| Maximum Absorption (λmax) | 507-515 nm (CHCl₃) | Characteristic absorption peak for quality verification |
| Tinting Strength | High | Strong coloration with minimal dosage |
| Purity | ≥ 90% - 98% (by HPLC/UV-vis) | Multiple grades available; research grade ≥98% |
| Melting Point | 199-205°C (199°C dec.; 202°C; 205°C) | Good thermal stability for processing |
| Boiling Point | 584.6°C at 760 mmHg | High thermal stability |
| Density | 1.22-1.23 g/cm³ | |
| Bulk Density | 0.24 kg/L | Good handling characteristics |
| Lightfastness (PS) | Grade 5-6 (1-8 scale) | Good UV resistance for interior applications |
| Heat Resistance (PS) | Up to 250°C | Suitable for polystyrene processing |
| Acid Resistance (5% HCl) | Good | Stable under acidic conditions |
| Alkali Resistance (5% NaOH) | Good | Stable under mild alkaline conditions |
| Recommended Dosage (PS Transparent) | 0.025% (250 g per 1000 kg) | Minimal addition for transparent applications |
| Recommended Dosage (PS Opaque) | 0.05% + 0.1% TiO₂ (500 g per 1000 kg) | Standard range for opaque applications |
| Storage Conditions | Store in cool, dry, well-ventilated area; keep containers tightly sealed; protect from light; store at +5°C to +30°C | Shelf life: 3-5 years under proper storage |
| Packing | 25 kg fiber drums / cardboard cartons with PE inner liner; research packs (100 mg, 1 g, 5 g); custom sizes available | Secure, moisture-proof packaging |
| Application | PS, ABS, PMMA, RPVC, polyester fibers, fuels, oils, waxes, inks, cosmetics, biological stains | Versatile across multiple industries |
3.Product Application
Plastics & Thermoplastics – Primary Industrial Application:
Solvent Red 23 is widely used for coloring various plastic materials, delivering excellent transparency and good heat stability.
Polyester Fibers & Textiles:
Solvent Red 23 is used in synthetic fiber coloration:
Dope Dyeing / Spin Dyeing: Added during fiber spinning for permanent, wash-fast coloration of terylene (polyester) fibers
Textile Applications: Provides uniform yellowish-red coloration for polyester fabrics
Hydrocarbon Fuels, Oils & Lubricants:
The dye's excellent oil solubility makes it ideal for petroleum-based products :
Gasoline & Diesel: Used as a fuel marker dye for tax compliance and brand identification
Lubricants & Oils: Colors industrial and automotive lubricants
Greases: Provides aesthetic red coloration for greases
Waxes & Candles: Provides uniform red coloration throughout the wax matrix
Printing Inks & Stationery:
Solvent Red 23 is suitable for specialty ink applications :
Ballpoint Pen Inks: Provides smooth, consistent red ink flow
Gravure & Flexographic Inks: Used in solvent-based ink systems for packaging
Aluminum Foil & Hot Stamping Foils: Offers good adhesion and gloss retention
Wood Stains & Leather Finishes: Provides transparent red coloration.
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/cardboard 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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