Check the product label if you have questions-–repellents must specify their active ingredients. In some cases you will note the chemical name in addition to/instead of the “common” name:

• DEET is N,N-diethyl-m-toluamide
• Picaridin is KBR 3023, sometimes known as Picaridin is KBR 3023, sometimes known as “Bayrepel”
• The active ingredient in oil of lemon eucalyptus is p-menthane 3,8-diol (PMD)