diff --git a/Data/Abbr/chemistry.csv b/Data/Abbr/chemistry.csv
index a19bac08..f853f28d 100644
--- a/Data/Abbr/chemistry.csv
+++ b/Data/Abbr/chemistry.csv
@@ -1136,7 +1136,7 @@ U,Undetectable
 U,Uranium
 UAFM,Uranyl Acetate Fluorescence Method
 UCK,Universal Chemical Key
-UG,Undisturbed Gas UHC,Unburned HydroCarbons
+UG,"Undisturbed Gas UHC,Unburned HydroCarbons"
 UHF,Ultra High Frequency
 UHMW,Ultra High Molecular Weight
 UHP,Ultra High Pressure