safety and storage of 2-thiazolamide and pure pyridine have unpleasant heteroodor, try to avoid inhalation or contamination of the skin surface. It is more lipophilic and easily absorbed than pure pyridine.

1. Methyl ethyl ketone is prone to various reactions due to its carbonyl group and active hydrogen adjacent to the carbonyl group. Condensation occurs when heated with hydrochloric acid or sodium hydroxide to form 3, 4-dimethyl-3-hexene-2-one or 3-methyl-3-heptene-5-one. When exposed to sunlight for a long time, ethane, acetic acid, condensation products, etc. Diacetyl is formed when oxidized with nitric acid. Acetic acid is produced when oxidized with chromic acid and other strong oxidants. Butanone is relatively stable to heat, 500℃ above hot crack to produce ketene or methyl ketene. When condensed with aliphatic or aromatic aldehydes, high molecular weight ketones, cyclic compounds, ketones and resins are produced.

For example, condensation with formaldehyde in the presence of sodium hydroxide first produces 2-methyl-1-butanol-3-ketone, followed by dehydration to produce methyl isoallyl ketone. The compound resinizes when exposed to sunlight or ultraviolet light. Condensation with phenol to form 2, 2-bis (4-hydroxyphenyl) butane. React with aliphatic ester in the presence of alkaline catalyst to produce β-dione.

In the presence of acid catalyst and acid anhydride acylation reaction, β-dione. It reacts with hydrogen cyanide to form cyanoalcohol. Reacts with ammonia to form ketol piperidine derivatives. The alpha-hydrogen atoms of butanone are easily replaced by halogens to form various halogenated ketones, such as 3-chloro-2-butanone when interacting with chlorine. Reaction with 2, 4-dinitrophenylhydrazine to form yellow 2, 4-dinitrophenylhydrazone (m.p.115℃). 2. Stability: Stability. 3. Forbidden compound: strong oxidant, base, strong reducing agent. 4. Polymerization hazard: No polymerization.

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