diff --git a/base/standard/src/main/java/org/openscience/cdk/math/MathTools.java b/tool/structgen/src/main/java/org/openscience/cdk/structgen/MathTools.java
similarity index 87%
rename from base/standard/src/main/java/org/openscience/cdk/math/MathTools.java
rename to tool/structgen/src/main/java/org/openscience/cdk/structgen/MathTools.java
index 86dc81ecb1..d11484ccbf 100644
--- a/base/standard/src/main/java/org/openscience/cdk/math/MathTools.java
+++ b/tool/structgen/src/main/java/org/openscience/cdk/structgen/MathTools.java
@@ -16,7 +16,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  */
-package org.openscience.cdk.math;
+package org.openscience.cdk.structgen;
 
 
 /**
@@ -25,7 +25,7 @@
  * @cdk.module standard
  * @cdk.githash
  */
-public class MathTools {
+class MathTools {
 
     /**
      * Analog of Math.max that returns the largest double value in an array of doubles.
@@ -33,7 +33,7 @@ public class MathTools {
      * @param   values  the values to be searched for the largest value among them
      * @return   the largest value among a set of given values
      */
-    public static double max(double[] values) {
+    static double max(double[] values) {
         double max = values[0];
         for (double value : values)
             if (value > max) max = value;
@@ -46,7 +46,7 @@ public static double max(double[] values) {
      * @param   values  the values to be searched for the smallest value among them
      * @return   the smallest value among a set of given values
      */
-    public static double min(double[] values) {
+    static double min(double[] values) {
         double min = values[0];
         for (double value : values)
             if (value < min) min = value;
@@ -56,7 +56,7 @@ public static double min(double[] values) {
     /**
      * Analog of Math.max that returns the largest int value in an array of ints.
      **/
-    public static int max(int[] values) {
+    static int max(int[] values) {
         int max = values[0];
         for (int value : values) {
             if (value > max) {
@@ -69,7 +69,7 @@ public static int max(int[] values) {
     /**
      * Analog of Math.max that returns the largest int value in an array of ints.
      **/
-    public static int min(int[] values) {
+    static int min(int[] values) {
         int min = values[0];
         for (int value : values) {
             if (value < min) {
@@ -79,11 +79,11 @@ public static int min(int[] values) {
         return min;
     }
 
-    public static boolean isOdd(int intValue) {
+    static boolean isOdd(int intValue) {
         return !MathTools.isEven(intValue);
     }
 
-    public static boolean isEven(int intValue) {
+    static boolean isEven(int intValue) {
         return intValue % 2 == 0;
     }
 
diff --git a/tool/structgen/src/main/java/org/openscience/cdk/structgen/RandomGenerator.java b/tool/structgen/src/main/java/org/openscience/cdk/structgen/RandomGenerator.java
index 2442507a04..c564867ca8 100644
--- a/tool/structgen/src/main/java/org/openscience/cdk/structgen/RandomGenerator.java
+++ b/tool/structgen/src/main/java/org/openscience/cdk/structgen/RandomGenerator.java
@@ -26,7 +26,6 @@
 import org.openscience.cdk.interfaces.IAtom;
 import org.openscience.cdk.interfaces.IAtomContainer;
 import org.openscience.cdk.interfaces.IBond;
-import org.openscience.cdk.math.MathTools;
 import org.openscience.cdk.tools.ILoggingTool;
 import org.openscience.cdk.tools.LoggingToolFactory;
 import org.openscience.cdk.tools.manipulator.BondManipulator;
diff --git a/tool/structgen/src/main/java/org/openscience/cdk/structgen/VicinitySampler.java b/tool/structgen/src/main/java/org/openscience/cdk/structgen/VicinitySampler.java
index 3ddea8e27a..81735ad2d6 100644
--- a/tool/structgen/src/main/java/org/openscience/cdk/structgen/VicinitySampler.java
+++ b/tool/structgen/src/main/java/org/openscience/cdk/structgen/VicinitySampler.java
@@ -29,7 +29,6 @@
 import org.openscience.cdk.interfaces.IAtom;
 import org.openscience.cdk.interfaces.IAtomContainer;
 import org.openscience.cdk.interfaces.IBond;
-import org.openscience.cdk.math.MathTools;
 import org.openscience.cdk.tools.ILoggingTool;
 import org.openscience.cdk.tools.LoggingToolFactory;
 import org.openscience.cdk.tools.manipulator.BondManipulator;
diff --git a/base/test-standard/src/test/java/org/openscience/cdk/math/MathToolsTest.java b/tool/structgen/src/test/java/org/openscience/cdk/structgen/MathToolsTest.java
similarity index 96%
rename from base/test-standard/src/test/java/org/openscience/cdk/math/MathToolsTest.java
rename to tool/structgen/src/test/java/org/openscience/cdk/structgen/MathToolsTest.java
index cb67fcde41..7fefafda0e 100644
--- a/base/test-standard/src/test/java/org/openscience/cdk/math/MathToolsTest.java
+++ b/tool/structgen/src/test/java/org/openscience/cdk/structgen/MathToolsTest.java
@@ -17,11 +17,10 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  */
-package org.openscience.cdk.math;
+package org.openscience.cdk.structgen;
 
 import org.junit.Assert;
 import org.junit.Test;
-import org.openscience.cdk.math.MathTools;
 import org.openscience.cdk.CDKTestCase;
 
 /**