1,3-Diphenyl-4,5-dihydro-1H-pyrazole

Also known as: 1H-Pyrazole,4,5-dihydro-1,3-diphenyl-, 1,3-Diphenyl-2-pyrazoline, 1,3-Diphenylpyrazoline, 4,5-Dihydro-1,3-diphenylpyrazole, NSC 186211, NSC 625226, BPPyr, DP, DPPyr, OSI 169050

1,3-Diphenyl-4,5-dihydro-1H-pyrazole (CAS 2538-52-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C15H14N2 and a molecular weight of 222.28500 g/mol. Key properties include a boiling point of 351.9ºC at 760mmHg, a density of 1.08g/cm3 and a flash point of 166.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2538-52-5
Jingsj CID: J-1478497-0
Molecular Formula: C₁₅H₁₄N₂
Molecular Weight: 222.28500 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	351.9ºC at 760mmHg
Density	1.08g/cm3
Flash Point	166.6ºC
Exact Mass	222.11600
PSA	15.60000
LogP	2.80160
Vapor Pressure	3.98E-05mmHg at 25°C
Refractive Index	1.613

Frequently Asked Questions

What is the CAS number of 1,3-Diphenyl-4,5-dihydro-1H-pyrazole?

The CAS number of 1,3-Diphenyl-4,5-dihydro-1H-pyrazole is 2538-52-5.

What are the molecular formula and molecular weight of 1,3-Diphenyl-4,5-dihydro-1H-pyrazole?

1,3-Diphenyl-4,5-dihydro-1H-pyrazole has molecular formula C15H14N2 and molecular weight 222.28500 g/mol.

What are the upstream and downstream products of 1,3-Diphenyl-4,5-dihydro-1H-pyrazole?

For 1,3-Diphenyl-4,5-dihydro-1H-pyrazole, Upstream Products: 1-Phenyl-2-propyn-1-ol, Phenylhydrazine, 1-Phenyl-3-(trimethylsilyl)-2-propyn-1-ol.

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. "1,3-Diphenyl-4,5-dihydro-1H-pyrazole (CAS 2538-52-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1478497-0 (accessed 2026-11-06).

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