Date published: 2026-3-7

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4-(4,5-dichloro-6-oxopyridazin-1(6H)-yl)benzenesulfonyl chloride (CAS 4003-65-0)

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CAS Number:
4003-65-0
Molecular Weight:
339.58
Molecular Formula:
C10H5Cl3N2O3S
Supplemental Information:
This is as a Dangerous Good for transport and may be subject to additional shipping charges.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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4-(4,5-dichloro-6-oxopyridazin-1(6H)-yl)benzenesulfonyl chloride, also known as 4-DBS, serves as a versatile reagent in the synthesis of various compounds, including peptides, peptidomimetics, and peptidomimetic analogs. Furthermore, it finds utility as a catalyst in polymer synthesis. Within the realm of enzymatic activity, 4-(4,5-dichloro-6-oxopyridazin-1(6H)-yl)benzenesulfonyl chloride proves to be a potent inhibitor of cytochrome P450 enzymes. By binding to the heme group of these enzymes, it effectively hampers their functionality. As a result, the inhibition of cytochrome P450 enzymes brings about a reduction in the synthesis of diverse compounds, such as fatty acids and steroids.

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

4-(4,5-dichloro-6-oxopyridazin-1(6H)-yl)benzenesulfonyl chloride, 250 mg

sc-348125
250 mg
$201.00

4-(4,5-dichloro-6-oxopyridazin-1(6H)-yl)benzenesulfonyl chloride, 1 g

sc-348125A
1 g
$407.00