We are open as normal during COVID-19 pandemic. Order online, same day shipping out.

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 574257

CAS#: 74938-88-8

Description: p-APMSF is an irreversible inhibitor of serine proteases.

Price and Availability

Size Price Shipping out time Quantity
1mg USD 210 2 Weeks
5mg USD 365 2 Weeks
10mg USD 580 2 Weeks
25mg USD 1000 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-07-11. Prices are subject to change without notice.

p-APMSF, purity > 95%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 574257
Name: p-APMSF
CAS#: 74938-88-8
Chemical Formula: C8H10ClFN2O2S
Exact Mass: 252.0136
Molecular Weight: 252.69
Elemental Analysis: C, 38.03; H, 3.99; Cl, 14.03; F, 7.52; N, 11.09; O, 12.66; S, 12.69

Synonym: p-APMSF, para-APMSF, (p-Amidinophenyl)methanesulfonyl Fluoride

IUPAC/Chemical Name: 4-(aminoiminomethyl)-benzenemethanesulfonyl fluoride, monohydrochloride


InChi Code: InChI=1S/C8H9FN2O2S.ClH/c9-14(12,13)5-6-1-3-7(4-2-6)8(10)11;/h1-4H,5H2,(H3,10,11);1H

SMILES Code: FS(CC1=CC=C(C(N)=N)C=C1)(=O)=O.Cl

Technical Data

Solid powder

>95% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO

Shelf Life:
>3 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:


1. Laura, R., Robison, D.J., and Bing, D.H. (p-Amidinophenyl)methanesulfonyl fluoride, an irreversible inhibitor of serine proteases. Biochemistry 19(21), 4859-4864 (1980).