C42H18N2O6 Vat Brown 1 BR C.I. 2R CAS 2475-33-4

Vat dyes vat brown BR C.I. vat brown 1 CAS 2475-33-4 vat brown 2R

Product Name:Vat brown BR; C.I. Vat Brown 1; Vat brown 2R

Chemical Structure:

Molecular Formula:C₄₂H₁₈N₂O₆

CAS: 2475-33-4

Quality standard: HG/T 3406-2014

Properties:

Dark brown powder. Insoluble in water and xylene (cold), slightly soluble in tetrahydronaphthalene (hot) and xylene (hot). It is green and gray in concentrated sulfuric acid and produces Brown precipitation after dilution. It is yellow brown in the alkaline solution of insurance powder and dark olive in the acidic solution.

Application:

Vat Brown BR is mainly used for dyeing cotton fiber with good levelness and affinity. It is also used for dyeing viscose fiber, silk, vinylon, viscose cotton and vinylon cotton. It can also be used to dye polyester cotton blended chemicalbook textiles in the same bath with disperse dyes, and polyester is less stained. Reduced Brown br can also be dyed with reduced grey BG in coffee color, and with reduced grey BG, brown GG and khaki GG in various gray and brown colors. It is a commonly used brown variety.

 

Shade card:

Shade	Dyeing method	Dyeing depth	Light fastness (Xenon)	Water spotting (immediately)	Level dyeing property
	IW	30g/l	6-7	4	Very good

 

 

IW dyeing process:

Optimun dyeing temperature: 45°C; Alkalinity of bath: medium; Electrolyte addition: yes; Remarks: medium affinity.