This product is not kosher or USP grade. Please see the links below for 0-Undecenoic acid products that are USP or kosher:
USP:
https://www.sigmaaldrich.com/product/usp/1705505
Kosher:
https://www.sigmaaldrich.com/product/sial/w324721
https://www.sigmaaldrich.com/product/aldrich/w324720


