3959 Prohexadione-calcium Prohexadione-calcium is a plant growth regulator that inhibits gibberellin metabolism. It is frequently used as a growth-retardant compound for apples. Prohexidione-calcium is known to reduce terminal growth by inhibiting 2-oxoglutarate-dependent dioxygenases, which are involved in the formation of growth-specific gibberellins (e.g., the conversion of GA20 to GA1), a group of plant hormones that are primarily responsible for regulation of shoot elongation in apple trees. In addition, it is also known that prohexadione-calcium interferes with ethylene biosynthesis and flavonoid metabolism, which can influence other responses in the plant. 127277-53-6 9868965 C20H22CaO10 White powder. No indication of carcinogenicity to humans (not listed by IARC). 2013-04-25T07:56:53Z 2026-04-03T08:51:27Z true [Ca++].CCC(=O)C1C(=O)CC(CC1=O)C([O-])=O.CCC(=O)C1C(=O)CC(CC1=O)C([O-])=O C20H22CaO10 InChI=1S/2C10H12O5.Ca/c2*1-2-6(11)9-7(12)3-5(10(14)15)4-8(9)13;/h2*5,9H,2-4H2,1H3,(H,14,15);/q;;+2/p-2 SAZAPFZGSHYFGB-UHFFFAOYSA-L 462.461 462.083888079 Exogenous Solid 8044656 CHEM002865 DTXSID9034496 NS00020973 calcium bis(3,5-dioxo-4-propanoylcyclohexane-1-carboxylate)