Wikipedia:Manual of Style/Chemistry/Safety

The majority of compounds could be described by a long list of potential hazards as well as H&P phrases. Wikipedia does not aspire to be a surrogate for MSDS and does not provide advice as a matter of policy. The hazards associated with most chemical compounds are adequately described in the Chembox via GHSPictograms, GHSSignalWord, NFPA, or MainHazard parameters; further elaborated in H and P phrases.

When the safety section is warranted beyond the information in the Chembox, information should be succinctly presented. Pertinent information could be LD50 and TLV. Editors recognize that all chemical compounds could be abused and can be dangerous under diverse circumstances. In cases where the mechanism of toxicity is noteworthy in a chemical context, e.g., the inhibition of myoglobin by carbon monoxide, a separate section within the article is often desirable because it illuminates the chemical subject. In a few cases where the literature and lore on toxicity is extensive, such as cyanide, an entire separate article can be warranted, e.g. cyanide poisoning. Obvious hazards that depend on knowledge of basic chemistry do not warrant inclusion. For example, since hexafluorophosphoric acid is a strong acid, it is not necessary to state that it should be stored away from bases and reactive metals.