A 21960

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

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

MedKoo CAT#: 571071

CAS#: 609-15-4

Description: A 21960 inhibits synapse formation between resolvase and two directly repeated res sites, blocking the site-specific recombination reaction.

Price and Availability

Size Price Shipping out time Quantity
Inquire bulk and customized quantity

Pricing updated 2020-11-23. Prices are subject to change without notice.

A 21960 is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months. Please send email to sales@medkoo.com to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 571071
Name: A 21960
CAS#: 609-15-4
Chemical Formula: C6H9ClO3
Exact Mass: 164.024
Molecular Weight: 164.59
Elemental Analysis: C, 43.79; H, 5.51; Cl, 21.54; O, 29.16

Synonym: A 21960; A21960; A-21960

IUPAC/Chemical Name: Acetoacetic acid, 2-chloro-, ethyl ester (8CI)


InChi Code: InChI=1S/C6H9ClO3/c1-3-10-6(9)5(7)4(2)8/h5H,3H2,1-2H3


Technical Data

Solid powder

>98% (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:
>2 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: Flanagan PM, Fennewald MA. Analysis of inhibitors of the site-specific
recombination reaction mediated by Tn3 resolvase. J Mol Biol. 1989 Mar
20;206(2):295-304. PubMed PMID: 2541253.