Abbreviations DIDS
CAS number 53005-05-3 (E) YesY
PubChem 9548709 (ZYesY
ChemSpider 7827632 (Z) YesY
KEGG C11591
MeSH 4,4'-Diisothiocyanostilbene-2,2'-disulfonic+acid
Beilstein Reference 6543839
Jmol-3D images Image 1
Molecular formula C16H10N2O6S4
Molar mass 454.52 g mol−1
Melting point

400 °C, 673 K, 752 °F

log P 4.72
Acidity (pKa) -3.21, -1.428, -0.37, 0.23
Basicity (pKb) 13.77, 14.37, 15.425, 17.21
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

4,4'-Diisothiocyano-2,2'-stilbenedisulfonic acid (DIDS) is an anion exchange inhibitor,[1] blocking reversibly, and later irreversibly, exchangers such as chloride-bicarbonate exchanger.[2]


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