Category:Articles with unknown NFPA 704 code
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Category should be empty.
Unknown NFPA 704 codes used. Articles are sorted by H, F, I, or S depending on the unknown code.
When there are multiple unknown codes, the article will be sorted under any one letter. So a page with an erroneous "F=7" code may be under "I" when that has an error too (like "I=5" or "R=5"). All error articles are in this category -- somewhere.
Populated by {{tl|NFPA 704 diamond}} (see its documentation). Note that code "S" (Special) is used, not "O" (Other).
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[{{fullurl:{{FULLPAGENAME}}|from=H}} H] Health, blue
[{{fullurl:{{FULLPAGENAME}}|from=F}} F] Flammability, red
[{{fullurl:{{FULLPAGENAME}}|from=I}} I] Instability (reactivity), yellow
[{{fullurl:{{FULLPAGENAME}}|from=S}} S] Special hazards, white
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