diff --git a/src/constants/common.ts b/src/constants/common.ts
new file mode 100644
index 0000000000000000000000000000000000000000..ee434dc7c1ebfa6b43b4f2b6004ef5d042a41861
--- /dev/null
+++ b/src/constants/common.ts
@@ -0,0 +1 @@
+export const SIZE_OF_EMPTY_ARRAY = 0;
diff --git a/src/redux/chemicals/chemicals.selectors.ts b/src/redux/chemicals/chemicals.selectors.ts
index d0cdd9b7caf2a7ec413b62fa2aba35b202160697..0fef7a3275e97b1a501223003e06e4cfe05f3f23 100644
--- a/src/redux/chemicals/chemicals.selectors.ts
+++ b/src/redux/chemicals/chemicals.selectors.ts
@@ -1,8 +1,7 @@
+import { SIZE_OF_EMPTY_ARRAY } from '@/constants/common';
 import { rootSelector } from '@/redux/root/root.selectors';
 import { createSelector } from '@reduxjs/toolkit';
 
-const SIZE_OF_EMPTY_ARRAY = 0;
-
 export const chemicalsSelector = createSelector(rootSelector, state => state.chemicals);
 
 export const loadingChemicalsStatusSelector = createSelector(
diff --git a/src/redux/drugs/drugs.selectors.ts b/src/redux/drugs/drugs.selectors.ts
index cca30ff272f61d3ae75d24ed4a21786ffe37e28b..7a1d3eacacbf0fee4cd7093f4c0255f4c910af51 100644
--- a/src/redux/drugs/drugs.selectors.ts
+++ b/src/redux/drugs/drugs.selectors.ts
@@ -1,8 +1,7 @@
+import { SIZE_OF_EMPTY_ARRAY } from '@/constants/common';
 import { rootSelector } from '@/redux/root/root.selectors';
 import { createSelector } from '@reduxjs/toolkit';
 
-const SIZE_OF_EMPTY_ARRAY = 0;
-
 export const drugsSelector = createSelector(rootSelector, state => state.drugs);
 
 export const loadingDrugsStatusSelector = createSelector(drugsSelector, state => state.loading);
diff --git a/src/redux/mirnas/mirnas.selectors.ts b/src/redux/mirnas/mirnas.selectors.ts
index 59af89ecd6b169ef1b9de2f1bd4467a56945af9e..51ac4dea078d807985a399bede164e6782e7ae9b 100644
--- a/src/redux/mirnas/mirnas.selectors.ts
+++ b/src/redux/mirnas/mirnas.selectors.ts
@@ -1,8 +1,7 @@
+import { SIZE_OF_EMPTY_ARRAY } from '@/constants/common';
 import { rootSelector } from '@/redux/root/root.selectors';
 import { createSelector } from '@reduxjs/toolkit';
 
-const SIZE_OF_EMPTY_ARRAY = 0;
-
 export const mirnasSelector = createSelector(rootSelector, state => state.mirnas);
 
 export const loadingMirnasStatusSelector = createSelector(mirnasSelector, state => state.loading);