Acid dyes distributors, manufacturers, exporters, and suppliers in India
Vizag chemical is one of the Acid dyes distributors, manufacturers, exporters, and suppliers in Visakhapatnam, Mumbai, Surat, Chennai, Ahmedabad, Pune, and Kolkata India. We are supplied to various industrial markets including Household, Institutional Cleaning, Personal Care, and Industrial sectors including Oil fields, Agriculture, Lubricants, Marine Industry, Metal Working chemical industry, and Coatings markets.
Acid dyes are anionic, soluble in water, and are essentially applied from acidic baths. These dyes possess acidic groups, such as SO3H and COOH, and are applied on wool, silk, and nylon when the ionic bond is established between protonated –NH2 group of fiber and acid group of dye. Overall wash fastness is poor although lightfastness is quite good. As dye and fiber contain opposite electrical nature, strike rate and uptake of acid dye on these fibers is faster; electrolyte at higher concentration is added to retard dye uptake and to form leveled shades. Acid generates cation on fiber and temperature helps to substitute the negative part of acid with anionic dye molecules.
Acid dyes belong to a class of dyes that are water-soluble and carry anionic properties. Dyes usually have a complex chemical structure containing sulphonyl or amino group which makes them soluble in water. Dyes used in the textile industry have very low pH levels, and are primarily used for dying wool, polyamides, and silk, but not for dyeing cotton due to its lack of affinity for cotton cellulose. Acid dyes are classified into three types based on their dyeing behavior, cost, and level of dyeing properties. Acid dyes generally do not contain any toxic ingredients, however, the intermediaries used in the manufacturing process have been found to contain toxic agents.
Food Industry
Acid dyes can also be used as food coloring, helping to increase the attractiveness of certain foods, and thus becoming more appealing to customers. Some examples include erythrosine, tartrazine, sunset yellow and Allura red, to name a few, many of which are azo dyes. These dyes can be used in frosting, cookies, bread, condiments or drinks. In order to prevent health hazards, a dye must be approved for consumption before it can be marked as edible. Some separation methods that can be used to identify unapproved dyes include the solid-phase extraction process, the overpressured thin-layer chromatography process, and the use of reversed-phase plates.
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