Chromotropic Acid CAS 148-25-4 1, 8-Dihydroxynaphthylene-3, 6-Disulfonic Acid

• Customization: Available
• CAS No.: 48-25-4
• Formula: C10h8o8s2
• Model NO.: YBC245
• EINECS: 205-712-7
• Color: /
• Appearance: /
• Type: Pharmaceutical Intermediates
• Quality: Refined
• Colour: /
• Samples: Available
• Certificates: ISO9001/SGS
• Package: 1g/5g/25g/100g/500g/10kg
• Stocks: in Stock
• Lead Time: 5-7 Working Days
• Shelf Life: 2-3 Years
• Site Audit: Available
• Transport: Air/Express/Sea
• MOQ: 10g
• Transport Package: Drum/Bottle/Bags
• Specification: 98%
• Trademark: Yunbang OEM
• Origin: China

Product Description

Chromotropic acid CAS 148-25-4 1,8-Dihydroxynaphthylene-3,6-disulfonic acid

Company Informations

Hunan Yunbang Pharmaceutical Co., Ltd. (Yunbangpharm) located in Changsha High-tech Industrial Park, Hunan. It is a high-tech enterprise specializing in the research and development, production and sales of Pharmaceutical raw materials, Pharmaceutical intermediates(API) and Fine chemicals. Based in China, Yunbangpharm has been providing suitable solutions for many domestic,foreign pharmaceutical companies and traders. Excellent quality, good reputation and authentic price have won the praise of the majority of customers.

The company adheres to the corporate tenet of "We do not produce medicines, but help pharmaceutical companies make good medicines".

We can provide customers with customized processing, research and development services;
We can develop high-end Pharmaceutical and chemical products with high technical difficulties,high barriers and unique production processes;
We can provide 100 grams Grade, kilograms, and hundred kilograms of raw material pharmaceutical intermediates and other products.
We can perform -100°C to 300°C reaction.

R&D strength is the company's core competitiveness.Yunbangpharm has maintains a good cooperation relationship with many Universities and Research institutes locally, which can quickly transform R&D results into industrial production.

Our goal : To achieve the integrated upgrade of Pharmaceutical intermediates, raw materials and high-end chemical products, adhere to "serving pharmaceutical companies, creating our brands" to provide customers with high-quality and low-cost pharmaceutical and chemical products, realizing Win-win cooperation and common development.
 

FAQ

1:Can I get some samples before bulk order?
A: Most products provide free samples, but the shipping cost be paid by customers.

2: What's your MOQ?
A: We can have a discussion.

3: Which kind of payment terms do you accept?
A: PI will be sent first after confirmation of order,enclosed our bank information.Payment by T/T, Western Union,D/P, ETC.

4.How to place an order?
A: You can contact me through Trademanager, WhatsApp, Email and other contact methods, tell me the product and quantity you need, and then we will give you a quote.

5:How about your delivery time?
A: Generally, it will take 3 to 5 days after receiving your advance payment.

6:How do you treat quality complaint?
A: First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
 

Our Advantages

1. 90days quality guarantee for exchange.

2. For each batch order extracts, we will attach a factory Inspection Report with the goods delivery , including the BatchNo/ Date/ Test index ects; also will keep the archived extracts to ensure received by customers are the same each time.

3. Our team of experienced professionals are available online 24 hours a day to answer any questions and provide guidance on product usage and maintenance.

Product analysis

 

 

 

Product Name:	1,8-Dihydroxynaphthylene-3,6-disulfonic acid
Synonyms:	4,5-dihydroxy-7-naphthalenedisulfonicacid;7-Naphthalenedisulfonicacid,4,5-dihydroxy-2;Chrmotropicacid;8-Dihydroxynaphthylene-3;4,5-Dihydroxy-2,7-naphthalene disulfonic acid 1,8-Dihydroxynaph-thalene-3,6-disulfonic acid;4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID;4,5-dihydroxynaphthalene-2,7-disulphonic acid;1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONIC ACID
CAS:	148-25-4
MF:	C10H8O8S2
MW:	320.3
EINECS:	205-712-7
Product Categories:	Intermediates of Dyes and Pigments
Mol File:	148-25-4.mol

1,8-Dihydroxynaphthylene-3,6-disulfonic acid Chemical Properties

Boiling point	429.2°C (rough estimate)
density	1.7929 (rough estimate)
refractive index	1.6000 (estimate)
storage temp.	Inert atmosphere,Room Temperature
pka	-0.51±0.40(Predicted)
CAS DataBase Reference	148-25-4(CAS DataBase Reference)
EPA Substance Registry System	2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy- (148-25-4)

Safety Information

HS Code

29089990

 

1,8-Dihydroxynaphthylene-3,6-disulfonic acid Usage And Synthesis

Chemical Properties	4,5-Dihydroxynaphthalene-2,7-disulfonic acid [148-25-4]. (1,8-dihydroxynaphthalene-3,6-disulfonic acid), chromotropic acid, C10H8O8S2, Mr 320.3: the disodium salt is readily soluble in water. Alkali fusion yields 1,3,8-trihydroxynaphthalene-6-sulfonic acid. Diazo coupling occurs in the 3- and 6-positions.
Uses	Chromotropic acid is used as an analytical reagent and as a coupling component for a wide range of azo dyes, e.g., C.I. Acid Violet 6, C. I. Mordant Blue 13, and C.I. Direct Blue 84.
Definition	ChEBI: A naphthalenesulfonic acid that is naphthalene-2,7-disulfonic acid substituted by hydroxy groups at positions 4 and 5.
Production Methods	2-Hydroxynaphthalene-3,6,8- trisulfonic acid total liquor is concentrated and heated with ca-ustic soda liquor to 158ºC for 20 - 30 h . The melt is diluted with water and poured into excess hydroc-hloric acid. Salt is added, sulfur di-oxide expelled, and the mixture cooled to precipitate the product as the disodium salt in 88 % yield. An alternative process is based on direct fusion (caustic liquor at 228ºC under pressure) of 1-aminonaphthalene-3,6,8-trisulfonic acid to chromotropic acid without isolating the intermediate oxy Koch acid.

 

Detailed Photos