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Home > Biochemical Engineering > Biochemical Reagents > Fluorescein for Sale > Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - large image1
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image1
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image2
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image3
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image4
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image5
Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine buy - image6

Fluorescein 2321-07-5 as adsorption indicator/redox indicator/fluorescence photometric analysis of sulfide ion/titration of chlorine, bromine iodine

11 Inquiries

Unit Price: Get Latest Price
CAS No.:

2321-07-5

Grade:

Chemical Grade

Content:

99%

Port:

Tianjin

Brand:

longbang

Packaging:

25kg/Drum

Price valid (until):

2024-08-15

Company Type:
Trader
Location:
China
Qualification:
Main Products:

chemical

  • Product Description

  • Seller Information

  • Inquiry History

  • Description


      Product Detail  



    • item
      value
      CAS No.
      2321-07-5
      Other Names
      Fluorescein
      MF
      C20H12O5
      EINECS No.
      219-031-8
      Place of Origin
      China

      Hebei
      Type
      Basic Dye
      Usage
      Leather Dyestuffs
      Application
      biological stains
      Color
      Red
      MOQ
      1 Kg
      Packing
      25kgs/drum
      Sample
      Availiable
      Purity
      99.9%




      Package and Logistics


    For powders: normal is 25kgs/Drum or bag, or larger/smaller package as request.

    For liquids: normal 25kgs/drum, 180-300kgs/bucket, or IBC, determined by the nature of the product. 

                         Or smaller package 1kg/bottle, 10kgs/bottle as request. 

    Shop Factory Supply High Qulity Poly(ethylene) CAS 9002-88-4-Detailed Image 1

    Shop Factory Supply High Qulity Poly(ethylene) CAS 9002-88-4-Detailed Image 2


      FAQ


    Q1. Could you please provide some samples?

    A1: Yes, Free samples for the quality evaluation for most products, but customers only need to undertake the shipping fee for delivery the samples to your destionation.


    Q2. What about the lead time?

    A2: Sample needs 3-5 days;    mass production time needs 1-2 weeks.


    Q3. Do you have any MOQ limit for order?

    A3: Low MOQ, 10-100g for sample checking is available.


    Q4. How do you ship the goods and how long does it take to arrive?

    A4: We usually ship by DHL, UPS, FedEx or TNT.     It usually takes 3-5 days to arrive.     Airline and sea shipping also optional.


    Q5. How to proceed an order for your products?

    A5: Firstly, let us know your requirements or application.

    Secondly, we quote according to your requirements or our suggestions.

    Thirdly customer confirms the samples and places deposit for normal order.

    Fourthly We arrange the production.


    Q6. Are you trading company or manufacturer?

    A6: We are chemical factory in China.     So, we can provide wholesale price.


    Q7: What are your payment terms?

    A7: We can accept various payment methods, T/T, PayPal, etc.


      Company Profile  


    Hebei Longbang Technology Co., LTD

    located in Shijiazhuang City, the capital of Hebei Province and the Beijing-Tianjin-Hebei New Zealand Hub, with convenient transportation. Our company is a modern high-tech chemical enterprise integrating R&D, production and sales.


    Our company has strong technical force, advanced equipment, strict quality management system and high-quality after-sales service, adheres to the business philosophy of "customer first, keen and enterprising", and adheres to honesty as the foundation of the company's survival. All for the satisfaction of customers, all for the long-term healthy development of the enterprise. In the past 10 years, we have been strictly managing the entire trading process, focusing on every detail, providing customers with a full range of services such as product procurement, research and development, quality control, logistics management, etc., and becoming a trustworthy partner and partner for customers. Nowadays, we have formed a product chain with many variety, large scale, complete products, refinement, high added value and high technical content. There are many series of medical products, food-grade additives, industrial grade, fertilizer grade, mineral products, etc.


    As a way to take advantage of the ever-expanding information resources in international trade, we welcome potential customers from anywhere online and off-line. Although we provide high-quality products, our qualified after-sales service team provides an effective and satisfying enquiry service. Item Inventory and Detail Detail Records as well as any other information will be sent to you in a timely manner to check the information.


    Shop Factory Supply High Qulity Poly(ethylene) CAS 9002-88-4-Detailed Image 3

    Shop Factory Supply High Qulity Poly(ethylene) CAS 9002-88-4-Detailed Image 4

    Basic Info
    Product Name:

    Fluorescein

    Other Name:

    FLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACIDFLUORESCEIN, FREE ACID;Diresorcinolphthalein;Tetraoxyphthalophenone anhydride;SOLVENT YELLOW 94;S NO 880;RESORCINOL PHTHALEIN;FLUORESCEIN, ALCOHOL SOLUBLE;FLUORESCEIN

    CAS No.:

    2321-07-5

    Molecular Formula:

    C20H12O5

    InChIKeys:

    GNBHRKFJIUUOQI-UHFFFAOYSA-N

    Molecular Weight:

    332.31

    Exact Mass:

    332.31

    BRN:

    94324

    EC Number:

    219-031-8

    UNII:

    TPY09G7XIR

    NSC Number:

    759114|667256

    TSCA:

    TSCA listed

    DSSTox ID:

    DTXSID0038887

    NCI Thesaurus Code:

    C61766

    Color/Form:

    Red to orange

    ATC Code:

    S01JA01|S - Sensory organs

    HScode:

    32042000

    Categories:

    Biochemical Reagents

    Characteristics
    λmax:

    493.5nm, 496nm, 460nm, 515nm

    PSA:

    87.74000

    Physical Properties:

    The fluorescence of this molecule is very intense; peak excitation occurs at 494 nm and peak emission at 521 nm.Fluorescein has a pKa of 6.4, and its ionization equilibrium leads to pH-dependent absorption and emission over the range of 5 to 9. Also, the fluorescence lifetimes of the protonated and deprotonated forms of fluorescein are approximately 3 and 4 ns, which allows for pH determination from non intensity based measurements. The lifetimes can be recovered using time-correlated single photon counting or phase-modulation fluorimetry.

    XLogP3:

    3.4

    Appearance:

    Red to orange Powder

    Density:

    1.2739 (rough estimate)

    Melting Point:

    320 °C(lit.)

    Boiling Point:

    429.44°C (rough estimate)

    Flash Point:

    232.6±25.0 °C

    Refractive Index:

    1.5000 (estimate)

    Water Solubility:

    insoluble

    Storage Conditions:

    −20°C

    Vapor Pressure:

    4.1X10-14 mm Hg at 25 deg C (est)

    PKA:

    2.2, 4.4, 6.7(at 25℃)

    Henrys Law Constant:

    1.1×1011mol/(m3Pa) at 25℃, HSDB (2015)

    Collision Cross Section:

    172.3 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]

    Experimental Properties:

    Fluorescein is a fluorescent indicator. From pH 4 to pH 4.5, it changes from colorless to green fluorescent.|Hydroxyl radical reaction rate constant = 2.0X10-10 cu cm/molec-sec at 25 °C (est)

    Air and Water Reactions:

    Insoluble in water.

    Reactive Group:

    Acids, Carboxylic

    Reactivity Profile:

    Fluorescein is incompatible with strong oxidizers. Also incompatible with acids, acid salts and salts of heavy metals. .

    Critical Temperature & Pressure:

    room temp

    Hazard Identification

    Classification of the substance or mixture

    Eye irritation, Category 2

    GHS label elements, including precautionary statements

    Pictogram(s)
    Signal word

    Warning

    Hazard statement(s)

    H319 Causes serious eye irritation

    Precautionary statement(s)
    Prevention

    P264 Wash ... thoroughly after handling.

    P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...

    Response

    P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

    Storage

    none

    Disposal

    none

    Other hazards which do not result in classification

    no data available

    Handling and Storage

    Precautions for safe handling

    Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

    Conditions for safe storage, including any incompatibilities

    Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

  • Seller Information
    Business Type:

    Trader

    Main Products:

    chemical

    Location:

    1803-1, Block A, Huaqiang Plaza, 77 Minzu Road, Xinhua District, Shijiazhuang City, Hebei Province, China

    Payment Terms:

    TT against copy of documents,L/C,TT against B/L draft before shipment,100% TT in advance

    Average lead Time:

    15

    Total Annual Revenue:

    $5 million-$10 million

    Total Employees:

    51-100

    Year of Establishment:

    2023

  • Inquiry History
    11 Inquiries
    Country Product Purchase Quantity Date Posted
    India

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    10.00 KG Nov 22, 2023
    United States

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    1 G Nov 16, 2023
    India

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    30.00 KG Sep 21, 2023
    India

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    India

    OPTICAL BRIGHTENER FP127

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    India

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    India

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    1.00 MT Oct 12, 2023
    India

    Methylene Blue

    1.00 MT Oct 12, 2023
    India

    Pigment Yellow 12

    1.00 MT Oct 12, 2023
    India

    OPTICAL BRIGHTENER OB

    1.00 MT Jul 21, 2023
    India

    AURAMINEO

    1.00 MT Jul 21, 2023
    Post an enquiry for this product
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