3875-70-5 Usage
Uses
Indigosol O is an indigo dye used for cotton.
Preparation
(a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Blue 1 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing C.I. Vat Blue 1. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.
Properties and Applications
Navy blue to red navy. Soluble in water and Etanol. In the Sodium hydroxide solution without change; In concentrated sulfuric acid for brilliant green. Mainly used for dyeing cotton fabric. Alkaline reduction leuco for yellow; Acid reduction leuco colorless. To cotton direct sex low, good levelness. Can also be used to viscose and adhesive/cotton blended fabric dyeing.
Standard
Ironing Fastness
Chlorine bleach
Light Fastness
Mercerized
Oxygen bleach
Soaping
Fading
Stain
ISO
4
2
3
4
3-4
AATCC
3
1-2
3
2-3
Standard
Ironing Fastness
Fading
Stain
ISO
4
AATCC
3
Check Digit Verification of cas no
The CAS Registry Mumber 3875-70-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,8,7 and 5 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 3875-70:
(6*3)+(5*8)+(4*7)+(3*5)+(2*7)+(1*0)=115
115 % 10 = 5
So 3875-70-5 is a valid CAS Registry Number.
