Organic Salts

Hydrazine is an inorganic compound with the chemical formula N
2H
4 (also written H
2NNH
2), called diamidogen, archaically. A simple pnictogen hydride, it is a colorless flammable liquid with an ammonia-like odour. Hydrazine is highly toxic and dangerously unstable unless handled in solution. Hydrazine is mainly used as a foaming agent in preparing polymer foams, but significant applications also include its uses as precursor to polymerization catalysts, pharmaceuticals, and agrochemicals. About two million tons of hydrazine hydrate were used in foam blowing agents in 2015. Additionally, hydrazine is used in various rocket fuels and to prepare the gas precursors used in air bags. Hydrazine is used within both nuclear and conventional electrical power plant steam cycles as an oxygen scavenger to control concentrations of dissolved oxygen in an effort to reduce corrosion.

Hydrazines refer to a class of organic substances derived by replacing one or more hydrogen atoms in hydrazine by an organic group

• It is used industrially as a solvent and in the manufacture of Polyurethanes.
• It is used as a raw material to produce tetrahydrofuran (THF), polybutylene terephthalate (PBT) resins, gamma-butyrolactone (), polyurethanes.
• It is used in pharmaceuticals.

• 1,4-butanediol was first prepared in 1890 by acid hydrolysis of N, N ?-dinitro-1,4-butanediamine. Other early preparations were by reduction of succinaldehyde or succinic esters and by saponification of the diacetate prepared from 1,4-dihalobutanes. A more modern process
• HC ≡ CH+2HCHO −−›HOCH???C ≡ CCH2OH −› HOCH2CH2CH2OH
• involves the use of maleic anhydride as the starting material. In the process maleic anhydride is first esterified with methanol and the ester is fed to a low-pressure vapor-phase hydrogenation system where it is converted to butanediol.

• Remove to fresh air. Get medical attention for any breathing difficulty. Induce vomiting immediately as directed by medical personnel. Never give anything by mouth to an unconscious person.
• Immediately flush skin with plenty of water for at least 15 minutes. Remove contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention if irritation develops.
• Immediately flush eyes with plenty of water for at least 15 minutes, lifting upper and lower eyelids occasionally. Get medical attention if irritation persists.