Date published: 2026-2-5

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CA III Inhibitors

CA3 Inhibitors encompass a wide spectrum of chemicals that primarily target the Carbonic Anhydrase III isozyme, a catalyst that facilitates the reversible hydration of carbon dioxide. One of the salient features of many inhibitors within this class is their origin from the sulfonamide derivative family. Sulfonamides can anchor themselves to the enzyme by binding directly to the zinc ion present in its active site. Acetazolamide, Methazolamide, Dorzolamide, Brinzolamide, and Benzolamide, among others, are quintessential representatives of this category. Their mode of action predominantly revolves around the active site, offering a direct inhibitory effect. Notably, while the primary mechanism is consistent across the sulfonamide derivatives, their potency can differ, with some exhibiting a more profound inhibitory impact than others.

Expanding beyond sulfonamides, the CA3 inhibitor class also encapsulates other chemicals that can offer inhibitory effects either directly or indirectly. Saccharin, for instance, is an artificial sweetener that demonstrates an ability to inhibit CA isozymes, although its potency isn't as pronounced as the sulfonamides. Another intriguing inclusion is compounds known for their primary functions in other domains but still showcase CA inhibitory activity. Topiramate, although recognized as an anticonvulsant, illustrates inhibitory activity against CA III. Similarly, Furosemide, largely labeled as a diuretic, harbors weak CA inhibitory attributes. It's this diverse group of compounds and their varying mechanisms that render the CA3 inhibitor class both intricate and versatile. The nature of their inhibitory actions ranges from direct interactions with the active site to more nuanced approaches, depending on their chemical composition and structure.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Acetazolamide

59-66-5sc-214461
sc-214461A
sc-214461B
sc-214461C
sc-214461D
sc-214461E
sc-214461F
10 g
25 g
100 g
250 g
500 g
1 kg
2 kg
$81.00
$177.00
$434.00
$541.00
$883.00
$1479.00
$2244.00
1
(1)

Sulfonamide derivative that inhibits CA by binding to the zinc ion in the enzyme's active site.

Methazolamide

554-57-4sc-235615
1 g
$94.00
3
(1)

Sulfonamide derivative that inhibits CA by binding to the active site; less potent than Acetazolamide.

Dorzolamide

120279-96-1sc-337687
1 g
$960.00
2
(0)

Topical sulfonamide inhibitor of CA; primarily used for ophthalmic purposes.

Brinzolamide

138890-62-7sc-481649
10 mg
$269.00
(0)

Another topical sulfonamide inhibitor of CA, mainly used for increased intraocular pressure.

Topiramate

97240-79-4sc-204350
sc-204350A
10 mg
50 mg
$107.00
$369.00
(1)

Primarily an anticonvulsant, but it also has CA inhibitory activity, especially against CA III.

Saccharin

81-07-2sc-212902
sc-212902A
sc-212902B
100 mg
1 g
10 g
$173.00
$235.00
$286.00
(0)

Artificial sweetener that can inhibit CA isozymes, although with lower potency compared to sulfonamides.

Sulthiame

61-56-3sc-474559
sc-474559A
25 mg
250 mg
$357.00
$2497.00
(0)

Known for its antiepileptic properties, but also acts as a CA inhibitor.

Furosemide

54-31-9sc-203961
50 mg
$41.00
(1)

Although primarily a diuretic, it has weak CA inhibitory properties.