Optical brightener SWN is soluble in ethanol and ethylene glycol, soluble in acidic aqueous solutions, and soluble in resins, varnishes, and some organic solvents. Its solubility in water is only 0.006%. Do not use in one bath with Sodium Chlorite.
Other Name:
Fluorescent Brightener SWN,Fluorescent Brightening Agent SWN, Optical Brightening Agent SWN,Fluorescent Whitening Agent SWN,OBA SWN
Synonyms/Alternative:
Optical brightener SWN, Coumarin 1, coumarin 460, Optical brightener MDAC, 7-(diethylamino)-4-methyl-coumarin, OBA 140, Fluorescent whitening agent 140, Optical brightening Agent 140, Fluorescent Brightener 140, OPTICAL BRIGHTENER 140, Fluorescent brightening agent 140, Uvitex WSG, HakkoL P, Uvitex SWN, SWR, Leucophor DC, WS, Blankophor FBP.
Common Application and Recommend Dosage
- In whitening and brightening of wool, silk, acetate fiber, triacetate fiber, etc.
- Dosage: Chinlon:0.05-0.3%, wool: 0.05-0.35%, acetate fiber: 0.05-1.4%, Triacetate fiber: 0.1-2%, Acrylic fiber: 0.05-0.8%.
- Mix it with sulfuric acid or hydrochloric acid to form a salt, or mix it with organic acids (such as tartaric acid, citric acid, and oxalic acid), or add a solvent to increase solubility and a dispersant to make a solution for applications. Add it to textiles to give a reddish-violet shade.
- Also can be used in cotton, plastic, and chromatically pressed paint and added into resin to whiten the fiber cellulose.
- Add in detergent to improve the whiteness of washed fabrics. Active with pH: 3-11.
- optical brightener SWN is also a common laser dye.
Technical Specifications
- C.I. No.: Fluorescent brightener 140
- Appearance: White to light brwon Crystalline Powder
- Content: 99.50%
- Melting point: 70-74℃
- Ash: 0.5%
- Max Absorption Wavelength:375nm (in ethanol)
Packaging & Storage
- 25KG fiber drum lined with PE liner.
- Should be stored in a cool, dry, and ventilated place, and the storage period should not exceed two years.
Transportation and Safty
- Avoid inversion, sunlight, moisture, and crash. Avoid damaging the package.
- Non Hazardous. Stock as ordinary chemicals. Wear Protective goggles and gloves while using. And avoid direct contact with skin and eyes. Soap clean if the skin is contaminated.
