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CAS 547-57-9 Tropaeolin O Sodium Salt

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CAS 547-57-9 Tropaeolin O Sodium Salt

CAS 547-57-9 Tropaeolin O Sodium Salt
CAS 547-57-9 Tropaeolin O Sodium Salt CAS 547-57-9 Tropaeolin O Sodium Salt

Large Image :  CAS 547-57-9 Tropaeolin O Sodium Salt

Product Details:
Place of Origin: China
Brand Name: YunbangPharm
Certification: ISO9001
Model Number: YB159
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: 1kg/Bottle, 5-25kg/Drum
Delivery Time: 5-8 working days
Payment Terms: L/C, D/A, D/P, T/T, Western Union
Supply Ability: 10Ton/Month

CAS 547-57-9 Tropaeolin O Sodium Salt

Product Name: Tropaeolin O Sodium Salt Cas No: 547-57-9
EINECS NO: 208-924-8 Molecular Formula: C12H11N2NaO5S
Colour: Rust To Dark Brown Form: Powder
PH: 11-13 Odor: Odorless
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CAS 547-57-9 Tropaeolin O Sodium Salt


Tropaeolin O Sodium Salt

CAS 547-57-9 Tropaeolin O sodium salt


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.


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.

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.



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.



Tropaeolin O sodium salt, also known as Orange G, is an orange synthetic organic compound frequently used as a pH indicator in laboratory applications. It changes color in response to changes in the acidity or alkalinity of a solution, transitioning from yellow in acidic conditions to orange and red under neutral to alkaline conditions.

In addition to its role as a pH indicator, Tropaeolin O sodium salt has also been employed in the dyeing of textiles and as a dye in the food industry. However, its use in food is now restricted in many countries due to safety concerns.


Product Name: CI 13015
Synonyms: 4-((2,4-dihydroxyphenyl)azo)-benzenesulfonicacimonosodiumsalt;4-[(2,4-dihydroxyphenyl)azo]-benzenesulfonicacimonosodiumsalt;TROPAEOLIN O C.I. NO. 14270;TROPAEOLIN OO C.I. NO. 13080;FAST YELLOW C.I. NO. 13080;AcidOrange6(C.I.14270);TROPAEOLIN O FOR C.I. No 14270;TROPAEOLIN 0
CAS: 547-57-9
MF: C12H11N2NaO5S
MW: 318.28
EINECS: 208-924-8
Product Categories: Azo;Organics;Analytical Chemistry;Indicator (pH);pH Indicators
Mol File: 547-57-9.mol
CI 13015 Structure
Melting point >300°C
storage temp. Room Temperature
solubility Solubility Soluble in water, ethanol
pka 11.5, 11.9(at 25℃)
form Powder
Colour Index 14270
color Rust to dark brown
PH Range Yellow (11.0) to red (12.7)
PH 11-13
Odor Odorless
Water Solubility Soluble in water and alcohol
λmax 490nm
Merck 14,9775
BRN 4173410
Major Application Photoresists, image forming materials, nonlinear optical (NLO) materials, etching, photography, inks, markers, lithium battery, leather dyes, polishing stainless steel, concrete, automobile radiators, textiles, cleaners, hair dyes, food storage, cosmetics, immunomodulating agents, disinfectant, antihistaminic agent, antimicrobial agent, nucleic acids
LogP 1.673 (est)
CAS DataBase Reference 547-57-9(CAS DataBase Reference)
EPA Substance Registry System Benzenesulfonic acid, 4-[(2,4-dihydroxyphenyl)azo]-, monosodium salt (547-57-9)
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Contact Details
Hunan Yunbang Biotech Inc.

Contact Person: Maggie Ma

Tel: +0086 188 7414 9531

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