All Faber-Castell products distributed by Faber-Castell USA are non-toxic and safe.  They are certified non-toxic by a board-certified toxicologist.  

When you see "Conforms to ASTM D-4236" on our packaging for products that contain art materials, this is what it means...

ASTM stands for American Society for Testing and Materials Standards. ASTM D-4236 is a labeling practice for products that contain art materials. An evaluation is to be conducted by a board-certified toxicologist. The evaluation ensures that the product is not expected to pose any significant chronic adverse health effects to humans via ingestion or skin contact when the products are used as intended or under circumstances involving reasonable foreseeable misuse. 

According to the U.S. Product Safety Commission, “Parents and others buying art materials, school supplies and toys such as crayons, paint sets, or modeling clay should be alert and purchase only those products which are accompanied by the statement Conforms to ASTM D-4236."