📄 Product Overview
Solvent Red 149 (CAS 71902-18-6) is a high-performance oil-soluble fluorescent red dye designed for plastics coloring applications. With excellent heat stability up to 300°C and good migration resistance, this dye delivers a bright, intense fluorescent red shade in transparent engineering plastics.
Manufactured under strict quality control protocols by Alfa Chemical, a leading China-based supplier, Solvent Red 149 offers batch-to-batch consistency and high purity (≥98% by HPLC). The product is available in flexible packaging options ranging from 1g research samples to 25kg bulk industrial quantities.
Important CAS Clarification: The primary CAS number for this product is 71902-18-6. The number 21295-57-8 is a historical alternative identifier. All products are manufactured and verified under CAS 71902-18-6.
China manufacturer direct. High purity. COA and SDS available with every shipment. 1g to 25kg bulk supply. For industrial use only. Not for food contact, pharmaceutical, or cosmetic applications without specific regulatory compliance testing.
⭐ Key Features
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🔴 Fluorescent Red Color
Produces a bright, intense fluorescent red shade in transparent plastics and coatings
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🔥 Heat Resistance
Stable at processing temperatures up to 300°C, suitable for injection molding and extrusion
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🚫 Migration Resistance
Minimizes bleeding and blooming in finished plastic products
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🧩 Broad Compatibility
Compatible with PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, and PA
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🏭 China Manufacturer
Factory direct pricing, COA and SDS provided with every shipment
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🚀 Applications
📋 Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | Solvent Red 149 |
| CAS Number | 71902-18-6 |
| Alternative CAS Reference | 21295-57-8 (historical) |
| Molecular Formula | C₃₀H₃₆N₄O₂ |
| Molecular Weight | ~508.6 g/mol |
| Purity (HPLC) | ≥ 98% (typical) |
| Appearance | Red powder |
| Melting Point | ~290-295°C |
| Heat Stability | Up to 300°C |
| Light Fastness | Grade 6-7 (scale 1-8) |
| Compatible Polymers | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Packaging Options | 1g / 10g / 25g / 1kg / 25kg |
📋 Quality Documentation
Each batch of Solvent Red 149 is manufactured under strict quality control protocols. Every shipment is accompanied by a Certificate of Analysis (COA) showing actual purity, HPLC trace, and other quality parameters.
Batch-specific COA available upon request. Safety Data Sheet (SDS) also available for download. Contact usfor the latest batch test report.
📦 Packaging & Shipping
❓ Frequently Asked Questions
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Q: What is the correct CAS number for Solvent Red 149?
The primary and most recognized CAS number is 71902-18-6. The number 21295-57-8 is a historical alternative identifier. Alfa Chemical supplies the product strictly as CAS 71902-18-6.
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Q: What is the difference between CAS 71902-18-6 and CAS 21295-57-8?
Both numbers have historically referred to similar or the same Solvent Red 149 dye. However, 71902-18-6 is the current standard CAS registry number. Our products are manufactured and verified under this primary CAS.
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Q: What is the purity of this product?
This product is ≥98% purity verified by HPLC analysis. Batch-specific purity data is provided on the Certificate of Analysis (COA).
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Q: What is the minimum order quantity?
MOQ is 1g for research samples. Larger quantities (10g to 25kg) available for industrial and bulk orders.
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Q: Do you provide COA and HPLC data?
Yes, COA and HPLC trace are provided with every shipment. Batch-specific documents are available upon request.
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Q: Is Solvent Red 149 suitable for food contact applications?
This product is designed for industrial plastics, inks, and coatings. It is not recommended for food contact, pharmaceutical, or cosmetic applications without specific regulatory compliance testing.
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🏭 Why Choose Alfa Chemical
10+ Years of Expertise
Focused on fine chemicals and specialty dyes
In-House Quality Control
HPLC-verified purity, batch-traceable COA
China Manufacturer Direct
Direct pricing, reliable supply chain, fast delivery
📋 Complete Solvent Dyes List
| Product Name | CAS No. | Application Range |
|---|---|---|
| Solvent Green 5 | 79869-59-3 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Yellow 14 | 842-07-9 | PS, UPVC, PMMA |
| Solvent Yellow 16 | 4314-14-1 | PS, UPVC, PMMA |
| Solvent Yellow 33 | 8003-22-3 | PS, UPVC, ABS, PC, PMMA, SAN |
| Solvent Yellow 56 | 2481-94-9 | PS, UPVC, PMMA |
| Solvent Yellow 93 | 4702-90-3 | PS, UPVC, PMMA, PET |
| Solvent Yellow 98 | 12671-74-8 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT |
| Solvent Orange 60 | 61969-47-9 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Orange 63 | 16294-75-0 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Red 23 | 85-86-9 | PS, UPVC, PMMA |
| Solvent Red 24 | 85-83-6 | PS, UPVC, PMMA |
| Solvent Red 25 | 3176-79-2 | PS, UPVC, PMMA |
| Vat Red 41 | 522-75-8 | PS, UPVC, PC, PMMA, SAN |
| Solvent Red 52 | 81-39-0 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT |
| Solvent Red 111 | 82-38-2 | PS, UPVC, ABS, PMMA, SAN |
| Solvent Red 135 | 71902-17-5 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT |
| Solvent Red 146 | 70959-30-8 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT |
| ⭐ Solvent Red 149 | 71902-18-6 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Red 179 | 89106-94-5 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Red 196 | 52372-36-8 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Red 197 | 52372-39-1 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Red 195 | 164251-88-1 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Violet 13 | 81-48-1 | PS, UPVC, ABS, PC, PMMA, SAN |
| Solvent Violet 59 | 6408-72-6 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT |
| Solvent Violet 31 | 70956-27-3 | PS, UPVC, ABS, PC, PMMA, SAN |
| Solvent Violet 36 | 61951-89-1 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Violet 37 | 61969-50-4 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Blue 35 | 17354-14-2 | PS, UPVC, PC, PMMA, SAN |
| Solvent Blue 78 | 2475-44-7 | PS, UPVC, PC, PMMA, SAN |
| Solvent Blue 97 | 61696-44-6 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Blue 104 | 116-75-6 | PS, UPVC, ABS, PC, PMMA, SAN, PET, PBT, PA |
| Solvent Green 3 | 128-80-3 | PS, UPVC, PC, PMMA, SAN |
Contact Us for Custom Packaging or Bulk Pricing
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