Orders received during 11/25~11/29 will be shipped in 11/30/2020 due to Thanksgiving holiday.

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

MedKoo CAT#: 571018

CAS#: 59684-59-2

Description: A1-226 is a cephalosporin of the class of β-lactam antibiotics originally derived from the fungus Acremonium, which was previously known as "Cephalosporium".

Price and Availability

Size Price Shipping out time Quantity
Inquire bulk and customized quantity

Pricing updated 2020-11-25. Prices are subject to change without notice.

A1-226 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#: 571018
Name: A1-226
CAS#: 59684-59-2
Chemical Formula: C16H15KN2O5S
Exact Mass: 386.0339
Molecular Weight: 386.46
Elemental Analysis: C, 49.73; H, 3.91; K, 10.12; N, 7.25; O, 20.70; S, 8.30

Synonym: A1-226, A1226

IUPAC/Chemical Name: 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((hydroxyphenylacetyl)amino)-3-methyl-8-oxo-, monopotassium salt, (6R-(6alpha,7beta(R*)))-


InChi Code: InChI=1S/C16H16N2O5S.K/c1-8-7-24-15-10(14(21)18(15)11(8)16(22)23)17-13(20)12(19)9-5-3-2-4-6-9;/h2-6,10,12,15,19H,7H2,1H3,(H,17,20)(H,22,23);/q;+1/p-1/t10-,12-,15-;/m1./s1

SMILES Code: O=C(C(N12)=C(C)CS[C@]2([H])[C@H](NC([C@H](O)C3=CC=CC=C3)=O)C1=O)[O-].[K+]

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:


Vila Jato JL, García JJ. [Blood levels of a new cephalosporin (A1-226) after its intramuscular administration in healthy volunteers]. Arch Farmacol Toxicol. 1981 Apr;7(1):29-34. Spanish. PubMed PMID: 6892497.