Allergenic Disperse Dyes & its uses

What are Allergenic Disperse Dyes?

Allergenic disperse dyes (around 19 substances +) The allergenic disperse dyes refer to the dyes that will cause allergy to skin, mucous membrane or respiratory passage allergy of human body or animal. there are totally 27 kinds of allergenic disperse dyes . two kinds of allergenic disperse dyes No.21 and No.22. These dyes are mainly used in dyeing of polyester, polyamide and cellulose acetate fibre, and 17 kinds of them are disperse dyes used in acetate fiber on early stage and it’s not permitted when the colorfastness to perspiration of dyeing textiles is lower than Grade 4.
Uses of Allergenic 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.

Textiles ~ mainly used on polyester & nylon. Rarely used on acetate and viscose.
Often found in stockings and sportswear and synthetic lining materials in footwear.
Banned Allergenic Disperse Dyes
alergenic

Why banned?
The allergenic disperse dyes refer to the dyes that will cause allergy to skin, mucous membrane or respiratory passage allergy of human body or animal

Normal limit: 5mg/L

Test method & standards:
DIN 54231 ,In-house method with HPLC, no standard method available.

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