That's a standard safety diamond, NFPA 704 https://en.wikipedia.org/wiki/NFPA_704 https://en.wikipedia.org/wiki/NFPA_704 tells you what kind of hazardous mater

That's a standard safety diamond, NFPA 704 https://en.wikipedia.org/wiki/NFPA_704 https://en.wikipedia.org/wiki/NFPA_704 tells you what kind of hazardous materials are inside basically.