
Product Name: Solvent Orange 63 / Fluorescent Red GG
Chemical Name: 14H-Anthra[2,1,9-mna]thioxanthen-14-one
Color Index: C.I. 58500
CAS: 16294-75-0
Molecular Formula: C₂₃H₁₂OS
Formula Weight: 336.41 g/mol
Synonyms: Fluorescent Red GG; Hostasol Red GG; Day-Glo Ozark Orange; C.I. Solvent Orange 63; Orange GG; Plast Orange 2002; D 063
Application:
Engineering Plastics (PS, ABS, PC, PMMA, PET, SAN, AS, RPVC), Polyester & Nylon Fibers, Printing Inks, Paints & Coatings, Smoke Formulations, Masterbatch, High-Visibility Markings.
1.Product Description
Achieve Brilliant Fluorescent Orange-Red Coloration with Solvent Orange 63 – The Premium Thioxanthene Dye for High-Visibility and Engineering Applications.
Solvent Orange 63, designated as C.I. 58500 and widely known as Fluorescent Red GG or Hostasol Red GG, is a high-performance thioxanthene-based solvent dye renowned for its intense fluorescence, brilliant orange-red shade, and exceptional visibility . This sophisticated dye features a unique 14H-anthra[2,1,9-mna]thioxanthen-14-one molecular structure that delivers superior fluorescence properties, converting invisible ultraviolet radiation into vibrant visible orange-red light .
What distinguishes Solvent Orange 63 from conventional solvent dyes is its exceptional combination of fluorescence intensity, heat resistance, and application versatility. With its high-boiling-point, low-volatility characteristics, this dye maintains its vibrant fluorescent color through demanding processing conditions . Its unique thioxanthene chemistry provides excellent solubility in organic solvents and superior compatibility with a wide range of engineering polymers .
Key differentiators:
Thioxanthene Chemistry: Provides intense fluorescence and high visibility, ideal for safety and high-visibility applications .
Brilliant Fluorescent Orange-Red Shade: Delivers a clean, transparent fluorescent orange-red hue with exceptional brightness .
Excellent Application Versatility: Suitable for plastics, fibers, printing inks, paints, and smoke formulations .
Good Fastness Properties: Exhibits excellent dyeing properties and compatibility across various substrates .
Broad Polymer Compatibility: Suitable for PS, ABS, PC, PMMA, PET, SAN, AS, RPVC, and engineering plastics .
2.Specification:
| Property | Specification | Insight |
| Product Name | Solvent Orange 63 (C.I. 58500) | Premium thioxanthene-based fluorescent dye |
| Appearance | Red to orange-red uniform powder | Free-flowing, fine powder |
| CAS No. | 16294-75-0 | Verified chemical registry number |
| EINECS/EC No. | 240-400-6 | Listed in European inventory |
| Molecular Formula | C₂₃H₁₂OS | Thioxanthene derivative |
| Formula Weight | 336.41 g/mol | Precise molecular mass |
| Solubility | Insoluble in water; soluble in organic solvents (toluene, xylene, DMF, chlorobenzene) | Excellent organic solubility for polymer applications |
| Ionic Style | Non-ionic / Solvent Dye | Compatible with various polymer systems |
| Color Shade | Fluorescent orange-red | Transparent, brilliant fluorescent hue |
| Purity | ≥ 95% - 99% | High purity ensures consistent performance |
| Melting Point | Not specified in search results | Contact manufacturer for thermal data |
| Storage Conditions | Store in cool, dry, ventilated warehouse; keep containers tightly sealed; protect from light | Shelf life: 2-3 years under proper storage |
| Packing | 25 kg fiber drums / cardboard cartons with PE inner liner; custom sizes available | Secure, moisture-proof packaging |
| Application | PS, ABS, PC, PMMA, PET, SAN, AS, RPVC, polyester fibers, nylon fibers, inks, paints, smoke formulations | Versatile across multiple industries |
3.Product Application
Engineering Plastics & Thermoplastics – Primary Application:
Solvent Orange 63 is widely used for coloring various engineering plastics, delivering brilliant fluorescent coloration with good fastness properties :
| Polymer Substrate | Recommended Dosage | Application Notes |
| Polystyrene (PS) | 0.02-0.05% | Excellent transparency and fluorescent effect |
| ABS | 0.02-0.05% | Good color development for automotive and consumer goods |
| Polycarbonate (PC) | 0.02-0.05% | High heat resistance for engineering applications |
| PMMA (Acrylic) | 0.02-0.05% | Excellent clarity and weatherability |
| PET (Polyester) | 0.02-0.05% | Suitable for bottle-grade and fiber applications |
| SAN / AS | 0.02-0.05% | Compatible with styrenic copolymers |
| Rigid PVC (RPVC) | 0.02-0.05% | Suitable for rigid plastic applications |
| PA6 / Nylon | 0.02-0.05% | Suitable for polyamide applications |
Polyester & Nylon Fibers:
Solvent Orange 63 is widely used in synthetic fiber coloration :
Dope Dyeing / Spin Dyeing: Added during fiber spinning for permanent, wash-fast coloration of polyester (terylene) and nylon (caprone) fibers
Textile Applications: Provides uniform fluorescent orange color with good visibility and durability
Printing Inks & Coatings:
The dye's intense fluorescence makes it ideal for high-visibility ink applications :
Gravure & Flexographic Inks: Provides fluorescent orange-red coloration for packaging and specialty printing
Industrial Coatings: Used in high-visibility coatings for safety and marking applications
Paints: Suitable for solvent-based paint formulations
Smoke Formulations:
Solvent Orange 63 is used in specialized smoke applications :
Colored Smoke: Component of pyrotechnic and signaling smoke formulations.
High-Visibility Markings: Provides bright, easily identifiable orange smoke.
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.