diff --git a/src/TexVC/ParserUtil.php b/src/TexVC/ParserUtil.php
index 5836384d0..9119ebaa1 100644
--- a/src/TexVC/ParserUtil.php
+++ b/src/TexVC/ParserUtil.php
@@ -35,6 +35,7 @@ class ParserUtil {
 		$optionsBase = [
 			'usemathrm' => false,
 			'usemhchem' => false,
+			'usemhchemtexified' => false,
 			'oldtexvc' => false,
 			'oldmhchem' => false,
 			'debug' => false,
diff --git a/src/TexVC/TexVC.php b/src/TexVC/TexVC.php
index 6bdf0dd5b..2c6c32b8a 100644
--- a/src/TexVC/TexVC.php
+++ b/src/TexVC/TexVC.php
@@ -73,7 +73,7 @@ class TexVC {
 			];
 
 			if ( $options['report_required'] ) {
-				$pkgs = [ 'ams', 'cancel', 'color', 'euro', 'teubner', 'mhchem', 'mathoid' ];
+				$pkgs = [ 'ams', 'cancel', 'color', 'euro', 'teubner', 'mhchem', 'mathoid', 'mhchemtexified' ];
 
 				foreach ( $pkgs as $pkg ) {
 					$pkg .= '_required';
@@ -92,6 +92,16 @@ class TexVC {
 					];
 				}
 			}
+			if ( !$options['usemhchemtexified'] ) {
+				if ( $result['mhchemtexified_required'] ??
+					$input->containsFunc( $this->tu->getBaseElements()['mhchemtexified_required'] )
+				) {
+					return [
+						'status' => 'C',
+						'details' => 'virtual mhchemtexified package required.'
+					];
+				}
+			}
 			return $result;
 		} catch ( Exception $ex ) {
 			if ( $ex instanceof SyntaxError && !$options['oldtexvc']
diff --git a/src/TexVC/texutil.json b/src/TexVC/texutil.json
index 05b0e3a79..0ce6072d1 100644
--- a/src/TexVC/texutil.json
+++ b/src/TexVC/texutil.json
@@ -1386,18 +1386,34 @@
 	"\\log": {
 		"latex_function_names": true
 	},
+	"\\longLeftrightharpoons": {
+		"mhchemtexified_required": true,
+		"nullary_macro": true
+	},
+	"\\longRightleftharpoons": {
+		"mhchemtexified_required": true,
+		"nullary_macro": true
+	},
 	"\\longleftarrow": {
 		"nullary_macro": true
 	},
 	"\\longleftrightarrow": {
 		"nullary_macro": true
 	},
+	"\\longleftrightarrows": {
+		"mhchemtexified_required": true,
+		"nullary_macro": true
+	},
 	"\\longmapsto": {
 		"nullary_macro": true
 	},
 	"\\longrightarrow": {
 		"nullary_macro": true
 	},
+	"\\longrightleftharpoons": {
+		"mhchemtexified_required": true,
+		"nullary_macro": true
+	},
 	"\\looparrowleft": {
 		"ams_required": true,
 		"nullary_macro": true
@@ -2320,6 +2336,10 @@
 		"ams_required": true,
 		"nullary_macro": true
 	},
+	"\\tripledash": {
+		"mhchemtexified_required": true,
+		"nullary_macro": true
+	},
 	"\\twoheadleftarrow": {
 		"ams_required": true,
 		"other_delimiters1": true
diff --git a/tests/phpunit/unit/TexVC/ApiTest.php b/tests/phpunit/unit/TexVC/ApiTest.php
index 2b644e13e..ceaf844de 100644
--- a/tests/phpunit/unit/TexVC/ApiTest.php
+++ b/tests/phpunit/unit/TexVC/ApiTest.php
@@ -238,4 +238,16 @@ class ApiTest extends MediaWikiUnitTestCase {
 			[ 'usemhchem' => true, 'oldmhchem' => true ] );
 		$this->assertEquals( ']_{x}^{2}', $result['output'] );
 	}
+
+	public function mhchemtexifiedTest() {
+		$result = $this->texVC->check( '\\longleftrightarrows',
+			[ 'usemhchemtexified' => true ] );
+		$this->assertEquals( '\\longleftrightarrows', $result['output'] );
+	}
+
+	public function mhchemtexifiedTestFail() {
+		$result = $this->texVC->check( '\\longleftrightarrows' );
+		$this->assertEquals( 'C', $result['status'] );
+		$this->assertFalse( $result['success'] );
+	}
 }
diff --git a/tests/phpunit/unit/TexVC/MMLGenerationTexUtilTest.php b/tests/phpunit/unit/TexVC/MMLGenerationTexUtilTest.php
index 516937862..1af24e850 100644
--- a/tests/phpunit/unit/TexVC/MMLGenerationTexUtilTest.php
+++ b/tests/phpunit/unit/TexVC/MMLGenerationTexUtilTest.php
@@ -27,8 +27,8 @@ class MMLGenerationTexUtilTest extends MediaWikiUnitTestCase {
 	private static $SIMILARITYTRESH = 0.7;
 	private static $SKIPXMLVALIDATION = true;
 	private static $APPLYFILTER = false;
-	private static $APPLYCATEGORYFILTER = false;
-	private static $FILTEREDCATEGORIES = [ "fun_ar1" ];
+	private static $APPLYCATEGORYFILTER = true;
+	private static $SKIPPEDCATEGORIES = [ "mhchemtexified_required" ];
 	private static $FILTERSTART = 15;
 	private static $FILTERLENGTH = 1;
 
@@ -39,7 +39,7 @@ class MMLGenerationTexUtilTest extends MediaWikiUnitTestCase {
 	/** @var bool export the updated TexUtil-Tex to "./ExportedTexUtilKeys.json" */
 	private static $EXPORT_KEYS = false;
 
-	private static $SKIPPEDINDICES = [ 15,33, 90, 383,554 ];
+	private static $SKIPPEDINDICES = [ 15, 33, 90, 383, 554 ];
 
 	/**
 	 * @dataProvider provideTestCases
@@ -215,7 +215,7 @@ class MMLGenerationTexUtilTest extends MediaWikiUnitTestCase {
 		$overAllCtr = 0;
 		$finalCases = [];
 		foreach ( $groups  as $category => $group ) {
-			if ( self::$APPLYCATEGORYFILTER && !in_array( $category, self::$FILTEREDCATEGORIES, true ) ) {
+			if ( self::$APPLYCATEGORYFILTER && !in_array( $category, self::$SKIPPEDCATEGORIES, true ) ) {
 				continue;
 			}
 			$indexCtr = 0;
diff --git a/tests/phpunit/unit/TexVC/TexUtilTest.php b/tests/phpunit/unit/TexVC/TexUtilTest.php
index 58a9d571f..42a8acbe6 100644
--- a/tests/phpunit/unit/TexVC/TexUtilTest.php
+++ b/tests/phpunit/unit/TexVC/TexUtilTest.php
@@ -61,6 +61,7 @@ class TexUtilTest extends MediaWikiUnitTestCase {
 			'mhchem_macro_2pc',
 			'mhchem_macro_2pu',
 			'mhchem_required',
+			'mhchemtexified_required',
 			'mhchem_single_macro',
 			'nullary_macro',
 			'nullary_macro_in_mbox',