Question

how formaldehyde are prepared their physical and chemical properties​

Answer 1

Answer:

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Explanation:

This chapter summarizes the relevant epidemiologic and toxicologic studies on formaldehyde. Selected chemical and physical properties, toxicokinetic and mechanistic data, and inhalation exposure levels from the National Research Council (NRC) and other agencies are also presented. The subcommittee considered all of that information in its evaluation of the Navy’s current and proposed 1-hour (h), 24-h, and 90-day exposure guidance levels for formaldehyde. The subcommittee’s recommendations for formaldehyde exposure levels are provided at the conclusion of this chapter along with a discussion of the adequacy of the data for defining those levels and the research needed to fill the remaining data gaps.

Answer 2

Answer:

In the commonly used formox process, methanol and oxygen react at ca. 250–400 °C in presence of iron oxide in combination with molybdenum and/or vanadium to produce formaldehyde according to the chemical equation: 2 CH3OH + O2 → 2 CH2O + 2 H2O.