Grand Chemical
Optical Brightener SWN
Optical Brightener SWN is supplied by Shandong Grand Chemical for wool, silk, acetate, triacetate, cotton. C.I. 140. CAS 91-44-1. 7-(Diethylamino)-4-methylcoumarin. Use the specification table below; figures that are not printed on the source product page are marked TBC or omitted.
woolsilkacetatetriacetatecottonplasticpaintdetergentlaser dye
Specification
| C.I. No. | 140 |
|---|---|
| CAS | 91-44-1 |
| Chemical name | 7-(Diethylamino)-4-methylcoumarin |
| Content | 99.50% |
| Melting point | 70–74 °C |
| Ash | 0.5% |
| Absorption | 375 nm |
| Appearance | White to light brown crystal |
| Dosage (source) | Chinlon 0.05–0.3%; wool 0.05–0.35%; acetate 0.05–1.4%. |
| Packing | 25 kg fiber drum |
| Synonyms on source page | FBA 140, Coumarin 1 |
What this grade is for
- Coumarin brightener for wool, silk and acetate. Source page also lists a laser-dye use.
Questions we actually get
What is SWN used for?
Optical Brightener SWN is listed for wool, silk, acetate, triacetate, cotton, plastic, paint, detergent, laser dye.
Do you publish a price?
No. The live catalog does not list prices. Ask for a quote with your polymer or fiber, process temperature and monthly volume.
Can I get TDS / COA / SDS?
Yes — request the current document set by WhatsApp or email. This site does not host downloadable PDFs because the source site does not publish a document library.
