diff --git a/mods/chem.js b/mods/chem.js
index 17375dfc..506bd6c8 100644
--- a/mods/chem.js
+++ b/mods/chem.js
@@ -383,6 +383,7 @@ function createAcid(name,reactions, gasReactions, color, colorGas, category, cat
 		ignore: elements.acid.ignore.concat(ignoreAcid),
 		reactions: reactions,
 		category: category,
+        hidden: categoryGas === "hidden",
 		tempHigh: tempHigh,
 		stateHigh: name + "_gas",
 		tempLow: tempLow,
@@ -401,6 +402,7 @@ function createAcid(name,reactions, gasReactions, color, colorGas, category, cat
 		ignore: elements.acid_gas.ignore.concat(ignoreAcid),
 		reactions: gasReactions,
 		category: categoryGas,
+        hidden: categoryGas === "hidden",
 		tempHigh: tempHighGas,
 		stateHigh: "fire",
 		tempLow: tempLowGas,