76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide CAS 76863-28-0

Purity 97%+In StockPharmaceutical Standards
CAS No.76863-28-0
Molecular FormulaC21H27N3O5S
Molecular Weight433.52 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide CAS 76863-28-0 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide.

76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide (CAS 76863-28-0) is a high-purity analytical reference standard with the molecular formula C21H27N3O5S and a molecular weight of 433.52 g/mol.

Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 433.52 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC21H27N3O5S
Molecular Weight433.52 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1978
Nitrogen Atoms3
Sulfur Atoms1

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