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primary reference standard

5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-benzopyrone, 4′,5,7-Trihydroxyflavone
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:


primary reference standard

shelf life

limited shelf life, expiry date on the label




>300 °C (lit.)

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Food and Beverages

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General description

Flavonoids belong to polyphenolic class of compounds. They play crucial role in biological activities which include tumor growth inhibition and chemoprevention. Apigenin is a plant flavonoid mostly used to inhibit ornithine decarboxylase activity and skin tumor.
Produced and qualified by HWI pharma services GmbH.
Exact content by quantitative NMR can be found on the certificate.


It may be used as internal standard for determining peurarin and its metabolites, using LC-ESI-MS/MS, in blood and urine of rats.

Biochem/physiol Actions

A plant flavonoid that has been found to inhibit cell proliferation by arresting the cell cycle at the G2/M phase. Inhibition of growth through cell cycle arrest and induction of apoptosis appear to be related to induction of p53. Inhibits PMA-mediated tumor promotion by inhibiting protein kinase C and the resulting suppression of oncogene expression. It has also been reported to inhibit topoisomerase I-catalyzed DNA re-ligation and enhance gap junctional intercellular communication.

Storage Class Code

11 - Combustible Solids

WGK Germany


Certificate of Analysis

Certificate of Origin

Identification of puerarin and its metabolites in rats by liquid chromatography-tandem mass spectrometry.
Prasain JK
Journal of Agricultural and Food Chemistry, 52(12), 3708-3712 (2004)
Inhibition of ultraviolet light induced skin carcinogenesis in SKH-1 mice by apigenin, a plant flavonoid.
Birt DF
Anticancer Research, 17(1A), 85-91 (1997)
Griangsak Eumkeb et al.
Phytomedicine : international journal of phytotherapy and phytopharmacology, 20(3-4), 262-269 (2012-12-12)
The purpose of this investigation was to examine the antibacterial and synergistic effect of naturally occurring flavonoids, apigenin, quercetin, naringenin and ceftazidime when use singly and in combination against ceftazidime-resistant Enterobacter cloacae strains by minimum inhibitory concentration (MIC), checkerboard and...
Ding-Guo Wu et al.
Toxicology letters, 224(1), 157-164 (2013-10-24)
Apigenin is a potential chemopreventive agent for cancer prevention. Because of the central role of transcription factor nuclear factor-κB (NF-κB) in pancreatic cancer, we investigated the roles of NF-κB in apigenin-induced growth inhibition in pancreatic cancer cells. It showed that...
Émilie C Lefort et al.
Molecular nutrition & food research, 57(1), 126-144 (2012-12-01)
Apigenin (4',5,7-trihydroxyflavone, 5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one) is a flavonoid found in many fruits, vegetables, and herbs, the most abundant sources being the leafy herb parsley and dried flowers of chamomile. Present in dietary sources as a glycoside, it is cleaved in the gastrointestinal...


HPTLC Application for Passiflora incarnata

Effective analysis of passion flower by HPTLC fingerprinting, in conjunction with a comprehensive range of related reference materials, enables fast and efficient identification of this plant material.

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