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CAS 2321-07-5 Fluorescein

China Hunan Yunbang Biotech Inc. certification
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CAS 2321-07-5 Fluorescein

CAS 2321-07-5 Fluorescein
CAS 2321-07-5 Fluorescein CAS 2321-07-5 Fluorescein

Large Image :  CAS 2321-07-5 Fluorescein

Product Details:
Place of Origin: China
Brand Name: YunbangPharm
Certification: ISO9001
Model Number: YB174
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 2321-07-5 Fluorescein

Product Name: Fluorescein Cas No: 2321-07-5
EINECS NO: 219-031-8 Molecular Formula: C20H12O5
Density: 1.2739 (rough Estimate) Refractive Index: 1.5000 (estimate)
Solubility: Insoluble Storage Condition: Room Temp
High Light:

CAS 2321-07-5 Fluorescein



CAS 2321-07-5 Fluorescein


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.


Product Name: 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
Fluorescein Structure
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
pka 2.2, 4.4, 6.7(at 25℃)
Colour Index 45350
form Powder
color Red to orange
PH Range Pink uorescence (4.0) to green uorescence (6.0)
Water Solubility insoluble
λmax 493.5nm, 496nm, 460nm, 515nm
Merck 14,4159
BRN 94324
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Major Application Organic light-emitting diode, nanoparticles, liquid crystal display, oil products, lip make-up, nucleic acid synthesis, amplification, sequencing and cloning, diagnosis of diabetic retinopathy, detecting yeast, multidrug resistance, proteins, antiHCV antibodies, target genes, enzymatic activity, nerve agent, nucleic acid sequences, imaging lung cancer, prostate cancer
Biological Applications Detecting chromosomal aberration; diagnosing corneal diseases; marking/detecting insects; as antitumor agent; as antihistaminic agent; use in agriculture and plant cultivation; use in cosmetics; use in ophthalmology; as a substrate for measuring α-amylases activity, elastases activity, esterases activity, β-glucuronidases activity, horseradish peroxidases activity, kinases activity, monoamine oxidases (MAOs) activity, phosphatases activity, phospholipases activity, proteases/proteinases activity, telomerases activity activity
LogP 2.980 (est)
CAS DataBase Reference 2321-07-5(CAS DataBase Reference)
EPA Substance Registry System Fluorescein (2321-07-5)
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Contact Details
Hunan Yunbang Biotech Inc.

Contact Person: Maggie Ma

Tel: +0086 188 7414 9531

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