Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate

六氟磷酸苯并三唑-1-基-氧基三吡咯烷基磷

Also known as: PyBOP, PYBOP, Benzotriazole-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate, (1H-Benzotriazol-1-yloxy)(tripyrrolidin-1-yl)phosphonium hexafluorophosphate, 1H-Benzotriazol-1-yloxytripyrrolidinophosphonium hexafluorophosphate, Benzotriazol-1-yloxytripyrrolidinophosphonium hexafluorophosphate, Castro's reagent

Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate (CAS 128625-52-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H28F6N6OP2 and a molecular weight of 520.39200 g/mol. It is also known as PyBOP, PYBOP and Benzotriazole-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate. Key property: a melting point of 154-156 °C (dec.)(lit.). GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
128625-52-5
Jingsj CID
J-1099088-5
Molecular Formula
C18H28F6N6OP2
Chinese Name
六氟磷酸苯并三唑-1-基-氧基三吡咯烷基磷
Molecular Weight
520.39200 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point154-156 °C (dec.)(lit.)

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate?

The CAS number of Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate is 128625-52-5.

What are the molecular formula and molecular weight of Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate?

Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate has molecular formula C18H28F6N6OP2 and molecular weight 520.39200 g/mol.

Is Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate hazardous?

Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "Benzotriazol-1-yl-oxytripyrrolidinophosphonium hexafluorophosphate (CAS 128625-52-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1099088-5 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.