The role of salicylaldehyde semicarbazone

Salicylaldehyde semicarbazone is white apparent powder. Melting point 225℃(decomposition ) .Used for fluorescence assurance of scandium, zinc reagents. Titration indicator of high-iron complex. Acid-base titration of the beaming indicator ( pH7.6 ~ 8 if the fluorescence from chicken to blue. ) Storage:This artefact should be bankrupt from light. actual of amoebic synthesis, for the alertness of photochromic dyes acute recording cardboard the, aswell acclimated in medicine, pesticide and added amoebic amalgam intermediates, acclimated in the assembly of furacilin, nitrofurantoin, carbazochrome, hydrocortisone, hydrocortisone and added drugs. Aswell acclimated for the assurance of aldehyde, ketone reagent. Store at allowance temperature, should be stored in a dry, aerial warehouse. Packaging should be complete. Should be waterproof, moisture-proof. Transportation have to bouncer adjoin rain and sunlight acknowledgment to sun. Loading and auction to light-light, packaging to anticipate breakage. And in accordance with the accoutrement of accepted chemicals.

Salicylaldehyde semicarbazone by urea - hydrazine hydrate amalgam by abstract of urea and hydrazine hydrate. The hydrazine hydrate and urea beating 1.515:1 into acknowledgment pot 40% mol arrangement of mixing, active and heating at 95-103 deg.c, abatement for 8h. Cooling and filtering, to semicarbazide aqueous solution, can be anon acclimated in amoebic synthesis. Sometimes the semicarbazide aqueous band-aid with hydrochloric acid, afterwards filtering, get semicarbazide hydrochloride. Acknowledgment of 2 with hydrazine sulfate - sodium thiocyanate method, hydrazine sulfate and sodium cyanate prepared. This artefact is bankrupt operation, bounded exhaust. The abettor have to go through specialized training, carefully accept by the rules. Proposed operators abrasion arrogance clarify affectation ( bisected affectation ), cutting careful actinic assurance glasses, abrasion anti-static overalls, cutting oil aggressive elastic gloves. Away from fire, calefaction source, smoker is banned in the workplace. Use explosion-proof blast systems and equipment. To anticipate beef arising in the air of workplace. Avoid acquaintance with acerbic agents, acids.

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