| CAS No.: | CAS 2321-07-5 |
|---|---|
| Formula: | C20h12o5 |
| EINECS: | 219-031-8 |
| Classification: | Organic Analytical Reagents |
| Grade: | AR |
| Specific Usage: | For Biological Purpose, For Tissue Medium Purpose, For Microbiological, For Microscopic Purpose, For Electron Microscopy, For Lens Blooming, Technical Grade, Pratical Use, Pro Analysis, Super Special Grade, For Synthesis, For Scintillation, For Electrophoresis Use, For Refractive Index |
| Samples: |
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| Customization: |
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Audited Supplier | Fluorescein Basic information | |
| Product Name: | Fluorescein |
| CAS: | 2321/7/5 |
| MF: | C20H12O5 |
| MW: | 332.31 |
| EINECS: | 219-031-8 |
| Fluorescein Chemical Properties | |
| Melting point | 320 °C(lit.) |
| Boiling point | 429.44°C (rough estimate) |
| density | 1.2739 (rough estimate) |
| refractive index | 1.5000 (estimate) |
| storage temp. | −20°C |
| solubility | Solubility Insoluble in water, ether, benzene, chloroform; soluble in ethanol, methanol, acetone, Iethyl acetate, N,N-dimethylformamide |
| Colour Index | 45350 |
| form | Powder |
| pka | 2.2, 4.4, 6.7(at 25ºC) |
| 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 | 144,159 |
| BRN | 94324 |
| Item | Specification |
| maximum absorption wavelength, λ(PH8.0), nm | 490-493 |
| mass absorption coefficient, λ(PH8.0),L/(cm·g) ≥ | 200 |
| Solubility in ethanol | Pass |
| sensitivity test | Pass |
| loss on drying, % ≤ | 5 |
| Burning residue (in sulfate), % ≤ | 0.3 |
Packaging: According to customer requirements
| Weight | Package |
| <25KG | By foil-alum bag/pap/bottle |
| ≥25kg | Package: 25kg/drum/bag or as your request |
Q1 Can i get some samples
A1 Yes, we can supply the free sample, but the shipping cost be paid by our customers.
Q2 How to start orders or make payments
A2 Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T, Western Union or Paypal or Escrow(Alibaba).
Q3 How to confirm the Product Quality before placing orders
A3 You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
Q4 What's your MOQ
A4 Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Q5 How about delivery leadtime
A5 Delivery lead time: About 3-5 days after payment confirmed. (Chinese holiday not included)
Q6 Is there a discount
A6 Different quantity has different discount.
Q7 How do you treat quality complaint
A7 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.
Q8 How to contact us
A9 You can chat with us by Trademanager,MSN&Skype Online.
You can choose your interested products and send inquiry to us.
You can dial our telephone directly or send Email to us., you will get our reply.
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