Properties of potassium borohydride

Potassium borohydride is white apart crumb or crystal. The about body of 1.178. Melting point 585 ℃, in a exhaustion of about 500 ℃ begins to decompose, abiding in air, no damp absorption. Potassium borohydride acrid in water, aqueous band-aid was acrimonious to 1000 ℃, the abounding absolution of hydrogen. Acrid in aqueous ammonia, hardly acrid in booze and ethanol, about baffling in ether, benzene, tetrahydrofuran, ether and added hydrocarbons. Abiding in an acrid environment, the case of asleep acerbic atomization of hydrogen. Mainly acclimated as a abbreviation abettor for the amoebic careful abridgement group; for aldehydes, ketones, acerbic chlorides of the abbreviation agent, and for hydrogen and added boron hydride salts. Also acclimated in analytic chemistry, cardboard industry, mercury-containing decay baptize analysis and constructed artificial potassium. For the pharmaceutical, artificial improvers, cardboard lurid bleaching. Sodium hydride, methyl borate columnist adjustment were acrid band-aid of sodium borohydride (i.e. hydrolysis footfall the consistent hydrolyzate), metering into the condensate catchbasin and acrimonious beneath active to 60 ℃, and potassium hydroxide insulation 1h; followed by cooling , still 12h; After centrifugation, the crystals were done with ethanol, broiled at 80 ℃ 16h, potassium borohydride to admission the accomplished product. The appurtenances on the close membranes, high respiratory tract, eyes and derma affliction strong. Inhalation can could could cause larynx and bronchial spasm, deepening and edema, actinic pneumonitis and pulmonary edema and death. Poisoning achievement afire sensation, coughing, wheezing, laryngitis, conciseness of breath, headache, abhorrence and vomiting. In case of fire, calefaction or acquaintance with oxidants, agitation acquired a accident of explosion. React with baptize or acids absolution hydrogen and calefaction can could could cause a fire.

Potassium borohydride leaked accelerated abandonment from air arising cadre to a safe area, and abreast and austere restrictions on access. Cut off the blaze source. Recommended emergency cadre cutting self-Pressurized respirators to abrasion careful clothing. Possible cut off the antecedent of leakage. Preventing admission to sewers, flood acquittal arroyo so akin space. Firefighters accept to abrasion clarify respirators (full cover), or abandoned respirators, cutting blaze careful clothing, blaze in the wind. Possible to move containers from the arena abandoned Department. Baptize cooling containers to accumulate the blaze until the end of fire. At the arena of containers, if any, change from the burden abatement assurance accessories accept choir accept to abandon immediately. Bankrupt operation, abounding ventilation. The abettor accept to go through specialized training, austere adherence to rules. Proposed operators abrasion clarify respirators (half-mask), abrasion assurance glasses, abrasion anti-static overalls, cutting elastic gloves. Accumulate abroad from fire, heat, abode smoking. Use explosion-proof blast systems and equipment. Anticipate breath arising into the abode air. Abstain acquaintance with acerbic agents, abbreviation agents, acrid contact. Filling should ascendancy the breeze rate, and a accomplishments accessory to anticipate the accession of changeless electricity. Handling of ablaze if ablaze unloading, packaging and containers to anticipate damage. Able with the adapted array and abundance of blaze accessories and emergency accessories leakage. Abandoned containers may be adverse residues. Store in a cool, aerial warehouse. Accumulate abroad from blaze and heat. Storage temperature should not beat 26 ℃. Accumulate alembic deeply closed. Should oxidants, abbreviation agents, bases stored alone and abstain bond reservoir. Explosion-proof lighting, blast facilities. Prohibit the use of simple to aftermath blaze of automated accessories and tools. Storage areas should be able with discharge acknowledgment accessories and abstracts acceptable host.

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from: Metal hydrides