Fluorescein-5-thiosemicarbazide

荧光素-5-氨基硫脲

Also known as: 5-FTSC, FITC-5-thiosemicarbazide, Fluorescein-5-thiosemicarbazide hydrochloride, Fluorescein-5-thiosemicarbazide, Fluorescent tag, N-(3',6'-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)hydrazinecarbothioamide

Fluorescein-5-thiosemicarbazide (CAS 76863-28-0) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H15N3O6 and a molecular weight of 405.36000 g/mol. It is also known as 5-FTSC, FITC-5-thiosemicarbazide and Fluorescein-5-thiosemicarbazide hydrochloride. Key properties include a boiling point of 742.2ºC at 760 mmHg and a flash point of 402.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
76863-28-0
Jingsj CID
J-1993457-8
Molecular Formula
C21H15N3O6
Chinese Name
荧光素-5-氨基硫脲
Molecular Weight
405.36000 g/mol
Category
Organic Compounds
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point742.2ºC at 760 mmHg
Flash Point402.7ºC
Exact Mass405.09600
PSA143.14000
LogP3.82520

Activity & Biological Data

Additional Information[1]. Zhang Y, et al. One-pot fluorescent labeling of saccharides with fluorescein-5-thiosemicarbazide for imaging polysaccharides transported in living cells. Carbohydr Res. 2011 Oct 18;346(14):2156-64. [2]. Havé M, et al. Protein carbonylation during natural leaf senescence in winter wheat, as probed by fluorescein-5-thiosemicarbazide. Plant Biol (Stuttg). 2015 Sep;17(5):973-9.

Frequently Asked Questions

What is the CAS number of Fluorescein-5-thiosemicarbazide?

The CAS number of Fluorescein-5-thiosemicarbazide is 76863-28-0.

What are the molecular formula and molecular weight of Fluorescein-5-thiosemicarbazide?

Fluorescein-5-thiosemicarbazide has molecular formula C21H15N3O6 and molecular weight 405.36000 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Fluorescein-5-thiosemicarbazide (CAS 76863-28-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993457-8 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.