Pyropheophorbide a

Also known as: Pyropheophorbide-α, Pyropheophorbide-alpha, 3-Phorbinepropanoic acid, 9-ethenyl-14-ethyl-4,8,13,18-tetramethyl-20-oxo-, (3S,4S)-, (3S,4S)-9-ethenyl-14-ethyl-4,8,13,18-tetramethyl-20-oxo-3-phorbinepropanoic acid, 31,32-Didehydrophytochlorin, Chlorophyll Impurity 6

Pyropheophorbide a (CAS 24533-72-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C33H34N4O3 and a molecular weight of 534.648 g/mol. Key properties include a boiling point of 991.5±65.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 553.5±34.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 24533-72-0
Jingsj CID: J-28944-1
Molecular Formula: C₃₃H₃₄N₄O₃
Molecular Weight: 534.648 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	991.5±65.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	553.5±34.3 °C
Exact Mass	534.263062
PSA	110.67000
LogP	6.49
Vapor Pressure	0.0±0.3 mmHg at 25°C
Refractive Index	1.665

Activity & Biological Data

Additional Information	[1]. Li W, et al. cRGD Peptide-Conjugated Pyropheophorbide-a Photosensitizers for Tumor Targeting in Photodynamic Therapy. Mol Pharm. 2018 Apr 2;15(4):1505-1514.

Frequently Asked Questions

What is the CAS number of Pyropheophorbide a?

The CAS number of Pyropheophorbide a is 24533-72-0.

What are the molecular formula and molecular weight of Pyropheophorbide a?

Pyropheophorbide a has molecular formula C33H34N4O3 and molecular weight 534.648 g/mol.

What are the upstream and downstream products of Pyropheophorbide a?

For Pyropheophorbide a, Upstream Products: Methyl pyropheophorbide-a, Pheophorbide A, Methyl pheophorbide a; Downstream Products: 2-ethyl-3-methylmaleimide.

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. "Pyropheophorbide a (CAS 24533-72-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28944-1 (accessed 2026-11-09).

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