diff --git a/C14.csv b/C14.csv
index c94e2ce..cc3da3d 100644
--- a/C14.csv
+++ b/C14.csv
@@ -464,7 +464,7 @@ CodeFigure,Meaning_en,ChemicalFormula,Status
 30336,Rubidium 90 metastable,Rb-90m,Operational
 30337,Rhodium 105 metastable,Rh-105m,Operational
 30338,Rhodium 107,Rh-107,Operational
-30339,Antimony 120,Sb-120,Operational
+30339,Antimony 128,Sb-128,Operational
 30340,Antimony 128 metastable,Sb-128m,Operational
 30341,Antimony 129 metastable,Sb-129m,Operational
 30342,Antimony 130,Sb-130,Operational