Fluorescein Powder CAS 2321-07-5

Fluorescein powder CAS 2321-07-5

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.

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.

Advantage

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.

Application

Fluorescein (free acid) has been used as a staining agent in retinal imaging.

Fluorescein (free acid) is widely used as a fluorescent stain and trace for many living cells and tissue applications. It is also suitable as a marker for the study of motility of bile canaliculi. Some of the clinical applications are evaluating the ocular surface and delineation of brain regions lacking a blood-brain barrier to permit accurate surgical resection of malignant glioma. Fluorescein angiography helps investigate changes in retinal blood supply. Fluorescein also plays a role as a physiological tracer to characterize the salmon′s intestinal permeability (Schep et al., 1998), and for the fluorophotometric measurement of aqueous humor flow. It is widely employed as a quantum yield standard.

Product Name:	Fluorescein
Synonyms:	FLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACID;Diresorcinolphthalein;Tetraoxyphthalophenone anhydride;SOLVENT YELLOW 94;S NO 880;RESORCINOL PHTHALEIN;FLUORESCEIN, ALCOHOL SOLUBLE;FLUORESCEIN
CAS:	2321-07-5
MF:	C20H12O5
MW:	332.31
EINECS:	219-031-8
Product Categories:	Fluorescent;Xanthene;Aromatics;Fluorescent Labels & Indicators;Heterocycles;FUNDUSCEIN;E-FFluorescent Probes, Labels, Particles and Stains;Fluorescein and Derivatives;Fluorescent Labels;Stains and Dyes;Stains&Dyes, A to;Intermediates & Fine Chemicals;Pharmaceuticals
Mol File:	2321-07-5.mol

Melting point	320 °C(lit.)
Boiling point	429.44°C (rough estimate)
density	1.2739 (rough estimate)
refractive index	1.5000 (estimate)
storage temp.	room temp
solubility	Solubility Insoluble in water, benzene, chloroform; soluble in ethanol, methanol