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Basic Info

Model No.: C.I.Vat Brown 1

Product Description


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 :
Vat Brown 1 CAS NO.2475-33-4


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