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Optical brightening agent ob-1 ob1 fluorescent brightener 393 / fba 393 cas 1533-45-5 for plastic/ plastic whitening agent us $10.00$28.00 / kilogram

Molecular formula:c 18 h 15 cln 2 o 6 s molecular weight: 422.84 cas registry number:7023-61-2 manufacturing methods :2-amino-4-chloro-5-methylbenzenesulfonic acid diazotization, and 3-hydroxy-2-naphthoic acid coupling, and then into calcium salt. properties and applications:brilliant red, shallow blue light pink.purple red powder. insoluble in water and ethanol.

These whitening agents absorb light in the uv spectrum and emit light in the blue region of the visible spectrum to yield a brighter and fresher appearance to the plastic. optical brighteners are used in engineering plastics like thermoplastic polyurethanes, polyvinylchlorides (pvc), styrene homo- and copolymers and polyolefins among others.

Optical brighteners, optical brightening agents (obas), fluorescent brightening agents (fbas), or fluorescent whitening agents (fwas), are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the electromagnetic spectrum, and re-emit light in the blue region (typically 420-470 nm) by fluorescence.these additives are often used to enhance …

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