Dynathrene dyes offer excellent fastness to washing, light and bleaching for cellulosic fiber.






Dynathrene


C.I. Vat


CAS NO.


Characteristics







Brown BR


Brown 1


2475-33-4


Reddish Brown






Product Name: Vat Brown 1
Product Description:
Synonyms:
C.I. 70802; C.I. 70800; C.I. Vat Brown 1; C.I. Vat
Brown 44;
6,23-dihydrodinaphtho[2,3-a:2',3'-i]naphtho[2',3':6,7]indolo[2,3-c]carbazole-5,7,12,17,22,24-hexone;
6,13-dihydrodinaphtho[2,3-a:2',3'-i]naphtho[2',3':6,7]indolo[2,3-c]carbazole-5,7,12,14,19,24-hexone;
Vat Brown Br; C.I.Vat Brown 1
Molecular Formula:C42H18N2O6


Molecular Weight: 646.60
CAS NO.2475-33-4


EINECS 219-599-7


Molecular Structure :







Properties and Applications: red light brown. Dark brown powder. Slightly soluble in hot 1, 2, 3, 4 Tetrahydronaphthalene and thermal Xylene, insoluble in cold Xylene. In concentrated sulfuric acid to Copenhagen green, dilution after brown precipitation. Alkaline reduction leuco for yellow brown; Acid reduction leuco for dark olive. Mainly used for cotton, hemp, silk and viscose dyeing and printing, cotton yarn dyeing common varieties. Used for polyester/cotton blended fabric two bath dyeing of polyester with little color. The leuco used for dyeing cotton knitwear.





Standard


Ironing Fastness


Chlorine bleach


Light Fastness


Mercerized


Oxygen bleach


Soaping




Fading


Stain




ISO


5


4-5


7


4-5


4-5


5


5




AATCC


5


5


8


4-5


4-5













--LYY


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