High quality 2379-74-0 factory REACTIVE DYES hot sell

Superiority:

High quality  2379-74-0 factory REACTIVE DYES hot sell

Product Information:

VAT dye refers to the fiber is reduced under alkaline conditions, and then oxidized, on the fiber to restore the original insoluble dye and dyeing, used for dyeing cellulose fiber; The insoluble VAT dye is made into sodium sulfate, and the soluble VAT dye is used for cotton printing.

The reduction process of dyes, that is, the generation of VAT dye cryptochromophores, is generally carried out in alkaline media. In the molecular structure of VAT dyes, there are at least two carbonyl groups (=C=O), which are reduced to hydroxyl group (-OH) by a strong reducing agent sodium disulfite (commonly known as insurance powder). Insurance powder chemical property is very active, in alkaline conditions even if the temperature is very low, can also produce a strong reduction, so that the VAT dye is reduced to cryptoic acid.

Na2S204 + 2H2O -→ 2NaHSO3 + 2[H]

VAT dye

VAT dye

2=C=O + 2[H] -- → 2 ≥C-OH

The hydroxyl compound formed in the reaction is the cryptic acid of the dye, which is also insoluble in water like the dye, but soluble in basic media, becoming the cryptic sodium salt solution. Because the sodium salt of cryptochromic substance does not often show the original color of the dye, it is called a cryptochromic substance:

≥C-OH + NaOH-→ ≥ C-ONA + H2O

Packing:  
1. Inner double plastic bags----25kg/Fiber drum (35*35*45cm, GW: 28kg, NW: 25kg); 

2. Inner double plastic bags----5kg/Aluminum foil bag (GW: 6.5kg, NW: 5kg). 
3. Inner double plastic bags----1kg/Aluminum foil bag (GW: 1.5kg, NW: 1kg). 
P.S.: we accept packaging customization. 
  
Delivery:   
1. Stock products are normally shipping within 3 working days.  
2. For rush delivery, please contact our sales team for particular arrangement. 
 

Shipping Details: 

 1. We ship goods via DHL, Fedex, UPS, TNT, China post, NL Post and other couriers, weight from 10g to 1000kg or even bulker. 

 2. Shipping details & shipping documents will be provided and sent by email. 
 3. We keep tracking the shippment until clients well received. 
 4. After years export shipping experience, with professional and experienced cooperated forwarders, we ensure that goods can be delivered in multiple ways safetly and efficiently.