Symbol 0615 from ISO 7000 - Title/Meaning: Protect from heat and radioactive sources 
Function/description: On packaging. To indicate that the contents of the package may deteriorate or be rendered totally unusable byheat or ionizing radiation and must be protected from these.
Own work using: iso.org/obp/graphics/grs/1ea525e4-0f92-4cf5-ac89-ea2add8cc20c 200.png
Vectorization:  Mrmw