Things like chloroform, DCM, sodium hydroxide, sulfuric acid, etc., yes, but fumaric acid and d-limonene? Neither one will cause any suspicion at all. They are not commonly used to make illegal drugs.
Fumaric acid is primarily used in cooking and wine making.
D-limonene is commonly used to clean around the house, and also used as a supplement.
There's NOTHING to worry about at all in my opinion.