Reactive Blue 19 (CAS 2580-78-1) is a high-performance, internationally recognized vinyl sulfone-based reactive dye specially developed for professional textile dyeing and biological staining applications.
The product appears as a delicate, uniform dark blue crystalline powder with pure and stable color tone, excellent powder fluidity and zero visible impurity particles. Different from ordinary dyestuffs, Reactive Blue 19 features refined crystalline structure, which effectively avoids agglomeration and ensures outstanding dispersion performance during water dissolution and industrial batching procedures.
Benefiting from its superior hydrophilic molecular property, the dye presents extremely high water solubility, enabling rapid, uniform and complete dissolution in normal-temperature water, providing stable and high-quality dye liquor for continuous and large-scale industrial production. With stable physical and chemical characteristics under room temperature conditions, it maintains long-term storage stability without color fading, deliquescence or performance degradation, greatly reducing product loss and quality fluctuation during transportation and inventory management.
This dye delivers brilliant color yield, excellent color uniformity and perfect levelness on cellulose fibers such as cotton, linen and blended fabrics. It possesses outstanding comprehensive fastness properties, including excellent light fastness, washing fastness, sweat fastness and rubbing fastness, effectively preventing color migration and fading after dyeing and finishing.
Meanwhile, Reactive Blue 19 shows low hydrolysis rate and high color fixation rate during dyeing process, which significantly improves dye utilization rate, reduces wastewater chroma and production cost, and meets modern environmental protection and high-efficiency production standards. In addition to traditional textile coloring fields, it is also widely applied in high-precision professional scenarios such as biological diagnostic reagent preparation, hematology testing and histological staining, thanks to its stable coloring effect, high sensitivity and accurate color presentation.
Fully registered with CAS database and EPA substance system, the product adopts standardized production and quality control, with stable batch consistency and complete safety qualification data, making it a reliable and versatile blue reactive dye for global industrial buyers.
REACTIVE BLUE 19 Chemical Properties |
density | 1.74[at 20℃] |
vapor pressure | 0Pa at 20℃ |
storage temp. | room temp |
solubility | water: 1 mg/mL, blue |
Colour Index | 61200 |
form | Crystalline Powder |
color | Dark blue |
Water Solubility | 220g/L at 20℃ |
Major Application | diagnostic assay manufacturing |
InChIKey | DPUYUJOBPVUODV-UHFFFAOYSA-N |
SMILES | N(C1C=CC=C(S(=O)(=O)CCOS(O)(=O)=O)C=1)C1=CC(S(O)(=O)=O)=C(N)C2C(C3=CC=CC=C3C(=O)C1=2)=O.[NaH] |
LogP | -7.2 at 20℃ |
CAS DataBase Reference | 2580-78-1(CAS DataBase Reference) |
EPA Substance Registry System | C.I. Reactive Blue 19 (2580-78-1) |
Safety Information |
Safety Statements | 24/25 |
WGK Germany | 1 |
RTECS | CB1050000 |
TSCA | TSCA listed |
HS Code | 29309099 |
Storage Class | 11 - Combustible Solids |
Hazardous Substances Data | 2580-78-1(Hazardous Substances Data) |
As a high‑performance organic reactive dye, Reactive Blue 19 is widely deployed across the textile manufacturing industry for fiber colouring and related processing operations. It is worth noting that this dye is classified as a water‑polluting substance, and relevant wastewater shall be properly handled before discharge. When treating waste effluent containing Reactive Blue 19, photocatalytic degradation represents one of the mainstream decolorization technical solutions; photocatalyst materials including bismuth oxo‑citrate are frequently adopted to break down dye molecules and eliminate chroma from wastewater. Apart from its core textile‑oriented usage, this product is also suitable for professional laboratory scenarios, covering dye substance analysis, metabolite identification and various environmental testing projects to support industrial environmental monitoring work.
Lead Time
In‑stock goods: Ready for shipment within 2‑3 working days upon receipt of formal order confirmation
New customized production batch: The whole manufacturing cycle will take 7‑10 working days subject to production schedule.
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