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Yellow Powder ISO14001 Fluorescent Brightener EBF-L CAS No 2866-43-5
Product Details
Mat no.10010020 Fluorescent Brightener EBF-L CAS No.2866-43-5 Light yellow Powder Purity≥98%
| Melting point | 216-220°C |
| Boiling point | 466.4±30.0 °C(Predicted) |
| density | 1.385 |
| Refractive index | 1.6000 (estimate) |
| Acidity coefficient (pKa) | 1.27±0.10(Predicted) |
| Water solubility | 9.551ug/L(25 ºC) |
| Use |
This product is used as a whitening agent for acetate, nylon, polyester, polypropylene, chlorinated and blended fibers.
Mainly used in commercial whitening agent EB, and also used for whitening and brightening various polyolefin plastics, BS engineering plastics, organic glass, etc. |
| Production method | Synthesis of 2-chloromethylbenzo[oxox]azole (feeding is mass fraction) Put 54.5 parts of o-aminophenol and 220 parts of chlorobenzene into the reactor, stir to form a suspension, and add 0.6 parts of catalyst pyridine. Under the protection of nitrogen and stirring, add 20.0 parts of 2-chloroacetyl chloride dropwise. After the addition is complete, heat to 80 ℃, gradually heat to 100 ℃ during the reaction, keep for 2 h, add 3 parts of o-toluene sulfonic acid, and continue Under nitrogen protection, stir and reflux for 5 h. The chlorobenzene is distilled off to obtain a brown oil, namely 2-chloromethylbenzo[ox]azole. |
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