Sodium fluorescein

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Sodium fluorescein
Posting date : Aug 05, 2026
Membership
Free Member Scince Jun 22, 2026
FOB Price
1
Min. Order Quantity
10g
Supply Abillity
50000kgs
Port
Beijing
Payment Terms
100% TT in Advance
Package
1
Keyword :
API
Category
Contact
Winnie Wang
Selling Leads Detail
Company Info
 
Quick Detail
Place of Origin
China [CN]
Brand Name
JINLAN Brand
Model Number
518-47-8
HS-CODE
-
Package & Delivery Lead Time
Package
1
Delivery Lead Time
7-14
Detailed Description

Basic Information

Product Name: Fluorescein Sodium
CAS No.: 518-47-8
EINECS No.: 208-253-0
Molecular Formula: \(\ce{C20H13NaO5}\)
Molecular Weight: 356.31
CI Number: 45350; also named fluorescein disodium salt, available in analytical reagent grade and reference standard grade.

Physical & Chemical Properties

It is an odourless rust-orange powder. Melting point: 320 °C; density: 0.579 g/cm³ at 20 °C, bulk density 600 kg/m³. Highly soluble in water (500 g/L at 20 °C). Aqueous solution (10 g/L, 20 °C) shows pH value of 8.3. Its fluorescence shifts from pink at pH 4.0 to green at pH 6.0; maximum absorption wavelengths are 491 nm, 493.5 nm and 490 nm. Recommended storage temperature: 5 °C ~ 30 °C.

Main Applications

Widely used as fluorescent tracer, acid-base fluorescent indicator, biological staining reagent, ophthalmic diagnostic agent, laboratory analytical reagent and fluorescent marking agent.

Concise Short Version

Fluorescein Sodium (CAS 518-47-8) is orange fluorescent powder used as fluorescent indicator, tracer and lab testing reagent, freely soluble in water, store between 5°C and 30°C.

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