diff --git a/apps/math_toolbox.cpp b/apps/math_toolbox.cpp
index fb69b4cb7..c230decff 100644
--- a/apps/math_toolbox.cpp
+++ b/apps/math_toolbox.cpp
@@ -319,9 +319,6 @@ const ToolboxMessageTree unitMagneticFieldChildren[] = {
 const ToolboxMessageTree unitInductanceChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::UnitInductanceHenrySymbol, I18n::Message::UnitInductanceHenry)};
 
-const ToolboxMessageTree unitCatalyticChildren[] = {
-  ToolboxMessageTree::Leaf(I18n::Message::UnitCatalyticActivityKatSymbol, I18n::Message::UnitCatalyticActivityKat)};
-
 const ToolboxMessageTree unitSurfaceChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::UnitSurfaceHectarSymbol, I18n::Message::UnitSurfaceHectar)};
 
@@ -358,7 +355,6 @@ const ToolboxMessageTree unitChildren[] = {
   ToolboxMessageTree::Node(I18n::Message::UnitMagneticFluxMenu, unitMagneticFluxChildren),
   ToolboxMessageTree::Node(I18n::Message::UnitMagneticFieldMenu, unitMagneticFieldChildren),
   ToolboxMessageTree::Node(I18n::Message::InductanceMenu, unitInductanceChildren),
-  ToolboxMessageTree::Node(I18n::Message::UnitCatalyticActivityMenu, unitCatalyticChildren),
   ToolboxMessageTree::Node(I18n::Message::UnitSurfaceMenu, unitSurfaceChildren),
   ToolboxMessageTree::Node(I18n::Message::UnitVolumeMenu, unitVolumeChildren),
 };
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index a5bfe5f33..fd237a440 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -143,7 +143,6 @@ UnitConductanceSiemensPicoSymbol = "_pS"
 UnitMagneticFluxWeberSymbol = "_Wb"
 UnitMagneticFieldTeslaSymbol = "_T"
 UnitInductanceHenrySymbol = "_H"
-UnitCatalyticActivityKatSymbol = "_kat"
 UnitSurfaceHectarSymbol = "_ha"
 UnitVolumeLiterSymbol = "_L"
 UnitVolumeLiterDeciSymbol = "_dL"
diff --git a/apps/toolbox.de.i18n b/apps/toolbox.de.i18n
index 26c267ef0..8ccf4b885 100644
--- a/apps/toolbox.de.i18n
+++ b/apps/toolbox.de.i18n
@@ -180,8 +180,6 @@ UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
 UnitInductanceHenry = "Henry"
-UnitCatalyticActivityMenu = "Catalytic activity"
-UnitCatalyticActivityKat = "Katal"
 UnitSurfaceMenu = "Area"
 UnitSurfaceHectar = "Hectare"
 UnitVolumeMenu = "Volume"
diff --git a/apps/toolbox.en.i18n b/apps/toolbox.en.i18n
index d0283edd9..953d9c822 100644
--- a/apps/toolbox.en.i18n
+++ b/apps/toolbox.en.i18n
@@ -180,8 +180,6 @@ UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
 UnitInductanceHenry = "Henry"
-UnitCatalyticActivityMenu = "Catalytic activity"
-UnitCatalyticActivityKat = "Katal"
 UnitSurfaceMenu = "Area"
 UnitSurfaceHectar = "Hectare"
 UnitVolumeMenu = "Volume"
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index a0fb8d186..fa0980083 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -180,8 +180,6 @@ UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
 UnitInductanceHenry = "Henry"
-UnitCatalyticActivityMenu = "Catalytic activity"
-UnitCatalyticActivityKat = "Katal"
 UnitSurfaceMenu = "Area"
 UnitSurfaceHectar = "Hectare"
 UnitVolumeMenu = "Volume"
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index a1746c6e4..768cd6c1f 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -180,8 +180,6 @@ UnitMagneticFieldMenu = "Induction électromagnétique"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Inductance"
 UnitInductanceHenry = "Henry"
-UnitCatalyticActivityMenu = "Activité catalytique"
-UnitCatalyticActivityKat = "Katal"
 UnitSurfaceMenu = "Superficie"
 UnitSurfaceHectar = "Hectare"
 UnitVolumeMenu = "Volume"
diff --git a/apps/toolbox.pt.i18n b/apps/toolbox.pt.i18n
index 25fcdce00..4769ae079 100644
--- a/apps/toolbox.pt.i18n
+++ b/apps/toolbox.pt.i18n
@@ -180,8 +180,6 @@ UnitMagneticFieldMenu = "Magnetic field"
 UnitMagneticFieldTesla = "Tesla"
 InductanceMenu = "Electrical inductance"
 UnitInductanceHenry = "Henry"
-UnitCatalyticActivityMenu = "Catalytic activity"
-UnitCatalyticActivityKat = "Katal"
 UnitSurfaceMenu = "Area"
 UnitSurfaceHectar = "Hectare"
 UnitVolumeMenu = "Volume"