Supply 4, 4′-Diamino-2, 2′-Stilbenedisulfonic Acid Dsd Acid CAS 81-11-8 for Disperse Dyes

• CAS No.: 81-11-8
• Formula: C14h14n2o6s2
• EINECS: 201-325-2
• Type: Synthesis Material Intermediates
• Appearance: Powder
• Quality: Industrial
• Colour: Yellow
• Transport Package: 25kgs/PP Bag
• Specification: 99.5% min
• Trademark: SWC
• Origin: China
• Production Capacity: 10000000

Product Description

 

Specification
 

Chemical name]: 4,4-Diaminostilbene-2,2-disulfonic acid

[Commodity name]: DSD Acid

[Structural Formula]: 

 

[Molecular Formula]: C14H14N2O6S2

[Molecular Weight]: 370.4

[Physical and chemical properties]: 

1) Light yellow paste or powder, soluble in alcohol and ether insoluble in water, readily soluble in a aqueous solution of alkali.

2) Easy be oxidated to red in air, it has properties of aromatic acid and aromatic amine.

PRODUCT NAME	DSD ACID
CAS NO.	81-11-8
MELTING POINT	300 °C
DENSITY	1.4732 (rough estimate)
refractive index	1.6510 (estimate)
APPLICATION	Intermediates such as dye and fluorescent whitening agent For the production of fluorescent brightener, direct frozen yellow G and direct yellow R, and as insecticide

Application

[Main Usage]: Used in manufacture of fluorescent whitening agent. Direct chrysophenine G. Direct yellow R and used as insect preventive etc.

[Packing]: For powders 25kg net poly-woven bags or as the customers requirements.

For paste 40kg net poly-woven bags or as the customers requirements.
 

 

Frequently Asked Questions

Q1: May I get one sample before placing order?
Re: Yes, Sample are available. For normal products, samples are for free and you just need to bear the freight; 

For those high value products, you just need to freight and certain product cost. When we both cooperate for 

some times or when you are our VIP customer, free sample will be offered when you need.

Q2: Which payment is available for your company?
Re: T/T, L/C. You can choose the one which is convenient for you. 

Q3: How and when can I get my goods after payment?
Re: For small quantity products, they will be delivered to you by international courier(DHL, FedEx, TNT etc.) 

or by air. Usually it will cost 3-5days that you can get the goods after delivery.For large quantity products,

shipping by see is worthwhile.It will cost days to weeks to come to your destination port, which depends on 

where the port is.

Q4: Is there any possible to use my appointed label or package?
Re: Yes. If needed, we'd like to use label or package according to your requirement. 

Q5: How can you guarantee the goods you offer is qualified? 
Re: We always believe honesty and responsibility are basis of one company, so whatever products we provide 

for you all are qualified. We will have goods tested and provide COA before delivery for sure.