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Laundry detergent fluorescing under ultraviolet light. 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) through the ...
The compound is a popular optical brightener for use in laundry detergents. It is produced by reduction of 4,4′-dinitro-2,2′-stilbenedisulfonic acid with iron powder. [ 1 ]
The blue light emitted by the brightener compensates for the diminishing blue of the treated material and changes the hue away from yellow or brown and toward white. Optical brighteners are used in laundry detergents, high brightness paper, cosmetics, high-visibility clothing and more.
E)-Stilbene itself is of little value, but it is a precursor to other derivatives used as dyes, optical brighteners, phosphors, and scintillators. [25] Stilbene is one of the gain mediums used in dye lasers. [26] 4,4 ′-diamino-2,2 ′-stilbenedisulfonic acid is a popular optical brightener used in some laundry detergents.
Laundry detergents may contain builders (50% by weight, approximately), surfactants (15%), bleach (7%), enzymes (2%), soil antideposition agents, foam regulators, corrosion inhibitors, optical brighteners, dye transfer inhibitors, fragrances, dyes, fillers and formulation aids.
Chillingsworth’s homemade laundry detergent recipe is easy to follow and only takes a few minutes to assemble. Combine 9 oz. soda crystals and 9 oz. bicarbonate of soda in a mixing bowl .
Make a detergent solution: Mix one-fourth (1/4) teaspoon of a liquid dishwashing detergent per one cup of lukewarm water. Do not use laundry detergents, as they may contain optical brighteners ...
CFW is a fabric brightening dye. It is water-soluble and colorless at first. It has an optical brightening effect that has been used since the 1940s to give a whiter appearance to textiles. It is also added to laundry detergents commercially as a brightener. [7]