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CAS number 149017-66-3 YesY, 192575-19-2 (tetrasodium salt) YesY
PubChem 6093163, 6532796 (tetrasodium salt)
ChemSpider 20136164
Jmol-3D images Image 1
Molecular formula C14H14N3O12PS2
Molar mass 511.38 g mol−1
Appearance Orange solid
Solubility in water 100 mM (tetrasodium salt)[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

PPADS (pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid) is a selective purinergic P2X antagonist.[2] It is able to block contractions of rabbit vas deferens induced by ATP or α,β,methylene-ATP. It appears to be relatively selection for P2X receptors, having no appreciable activity at α1 adrenergic, muscarinic M2 and M3, histamine H1, and adenosine A1 receptors.[3]


  1. ^ PPADS tetrasodium salt, Santa Cruz Biotechnology
  2. ^ Ziganshin, AU (December 1993). "PPADS selectively antagonizes P2X-purinoceptor-mediated responses in the rabbit urinary bladder.". British Journal of Pharmacology 110 (4): 1491–95. doi:10.1111/j.1476-5381.1993.tb13990.x. PMC 2175839. PMID 8306091. Retrieved 24 July 2011. 
  3. ^ Lambrecht, G. (1992). "PPADS, a novel functionally selective antagonist of P2 purinoreceptor mediated responses". European Journal of Pharmacology 217: 217–19. doi:10.1016/0014-2999(92)90877-7. PMID 1330591.