Procyanidin B1

Also known as: (2R,2'R,3R,3'S,4R)-2,2'-Bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-2H,2'H-4,8'-bichromene-3,3',5,5',7,7'-hexol, Epicatechin(4β→8)catechin, Procyanidin B1 [Epicatechin (4β→8) catechin], Proanthocyanidin B1, cis,trans''-4,8''-Bi-(3,3',4',5,7-Pentahydroxyflavane), UNII-L88HKE854X

Procyanidin B1 (CAS 20315-25-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C30H26O12 and a molecular weight of 578.520 g/mol. Key properties include a melting point of 231～232℃, a boiling point of 955.3±65.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 531.6±34.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20315-25-7
Jingsj CID: J-1973402-2
Molecular Formula: C₃₀H₂₆O₁₂
Molecular Weight: 578.520 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	231～232℃
Boiling Point	955.3±65.0 °C at 760 mmHg
Density	1.7±0.1 g/cm3
Flash Point	531.6±34.3 °C
Exact Mass	578.142456
PSA	220.76000
LogP	0.30
Vapor Pressure	0.0±0.3 mmHg at 25°C
Refractive Index	1.803
Storage Conditions	2-8°C

Activity & Biological Data

Additional Information	[1]. Xing J, et al. Anti-inflammatory effect of procyanidin B1 on LPS-treated THP1 cells via interaction with the TLR4-MD-2 heterodimer and p38 MAPK and NF-κB signaling. Mol Cell Biochem. 2015 Sep;407(1-2):89-95. [2]. Kanno H, et al. Protective effects of glycycoumarin and procyanidin B1, active components of traditional Japanese medicine yokukansan, on amyloid β oligomer-induced neuronal death. J Ethnopharmacol. 2015 Jan 15;159:122-8. [3]. Shimada T, et al. Flavangenol (pine bark extract) and its major component procyanidin B1 enhance fatty acid oxidation in fat-loaded models. Eur J Pharmacol. 2012 Feb 29;677(1-3):147-53.

Additional Information

[1]. Xing J, et al. Anti-inflammatory effect of procyanidin B1 on LPS-treated THP1 cells via interaction with the TLR4-MD-2 heterodimer and p38 MAPK and NF-κB signaling. Mol Cell Biochem. 2015 Sep;407(1-2):89-95. [2]. Kanno H, et al. Protective effects of glycycoumarin and procyanidin B1, active components of traditional Japanese medicine yokukansan, on amyloid β oligomer-induced neuronal death. J Ethnopharmacol. 2015 Jan 15;159:122-8. [3]. Shimada T, et al. Flavangenol (pine bark extract) and its major component procyanidin B1 enhance fatty acid oxidation in fat-loaded models. Eur J Pharmacol. 2012 Feb 29;677(1-3):147-53.

Frequently Asked Questions

What is the CAS number of Procyanidin B1?

The CAS number of Procyanidin B1 is 20315-25-7.

What are the molecular formula and molecular weight of Procyanidin B1?

Procyanidin B1 has molecular formula C30H26O12 and molecular weight 578.520 g/mol.

What are the upstream and downstream products of Procyanidin B1?

For Procyanidin B1, Upstream Products: (+)-Catechin, (-)-Epicatechin; Downstream Products: (-)-Epicatechin, (+)-Catechin, Cyanidin.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Procyanidin B1 (CAS 20315-25-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973402-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.