R&F Pigment Sticks, 38ml, Cobalt Yellow Handmade in the usa Pigment sticks are high quality oil paint with just enough natural wax added to maintain a solid stick form Contains potassium cobaltinitrite Conforms to ASTM D-4236, this product contains a chemical known in the State of California to cause cancer Contains cadmium or cobalt compounds which can cause cancer by ingestion; (risk of cancer depends on duration and level of exposure); do not swallow, wash hands and face after use and before eating or smoking; if swallowed, see a physician