Why need to know your garments,stockings,sportswear,footwear are need “Allergenic Disperse Dyes” free.

Description:
A class of water insoluble dyes, some of which are skin irritants and carcinogens. Also known as Sensitising Disperse Dyes.

Over 50% are simple azo compounds, 25% are anthraquinones the rest methine, nitro and naphthoquinone dyes.
Supplied as powder and liquid products. Lack Solubilising groups so powder dyes contain 40-60% of dispersing agents,liquid formulations 10-30%.
Mainly used for the dyeing of polyester having extremely high light fastness for very pale colours.

Have in their molecule hydrogen atoms capable of forming hydrogen bonds with oxygen and nitrogen atoms on the fibre, which is very important in polyester fibres.
In addition, they are also used for dyeing of cellulose (acetate and triacetate), polyamide and acrylic fibres.
Apart from these, disperse dyes are also widely used for printing synthetic fibres.

Chemically:
Dyestuff is divided into several groups, depending on chemical configuration or proceeding. One group is the disperse dyestuff, which substances substantially are water-insoluble. The dyes are either finely ground and in presence of a dispersing agent, so that they are available as paste, or dried and as powder.
Typically the particles are not chemical-bonded fixed. Thus during process high temperature and in some cases pressurized dye bath is used.

Restricted Substances:
alergenic

Possible application / Where they may be found:
Textiles ~ mainly used on polyester & nylon. Rarely used on acetate and viscose.
Often found in stockings and sportswear and synthetic lining materials in footwear.

The main use of disperse dyestuff is to dye polyester, but they can also be used to dye other synthetic fibres and items like polyamide or acrylic.

Effects / Reason for concern:
Humans ~ skin irritant and some of the dyes are also carcinogenic. Once sensitised to these disperse dyes, even minute quantities can cause a violent reaction.

These substances are sensitizing and allergenic.

The most prevalent health problems associated with some disperse dyes arise from their irritant properties.
These may cause skin irritation, itchy, stuffy noses, sneezing and sore eyes. Certain disperse dyes are recognised skin sensitizers.
alergenic1

Exposure:
Humans ~ products in direct contact with the skin.

Alternatives:
Many alternative non-allergenic dyestuffs are available.

Comments:
Some of these dyes may exhibit poor colourfastness so this might help to indicate when these dyes are being used.

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