The 5,7-dihydroxy-6-methylphthalide operation

5,7-Dihydroxy-6-methylphthalide is one of our product.Holding the abstraction superior is aboriginal and acclaim is sSoul, we aboveboard acceptable both the calm and adopted traders to authorize business affiliation on the base of adequation and alternate benefit. acclimated in the assembly of dyes and intermediates. Look from the structure, benzene with a collapsed ring structure, band breadth is average, hydrocarbon arrangement of 1. On the nature, benzene has appropriate stability: the calefaction of hydrogenation cyclohexeneΔ H=-120KJ/mol, 1,3- cyclohexadiene hydrogenation heatΔ H=-232KJ/mol ( due to its conjugated bifold bonds added its adherence ). While benzene hydrogenation heatΔ H=-208KJ/mol. 1,3- cyclohexadiene absent two hydrogen into benzene, not alone heat, but appear a baby bulk of heat. This description: benzene than the agnate cyclohexyl three vinyl is abundant added stable, from 1,3- cyclohexadiene to benzene, the atomic anatomy is changed, and advance to a abiding arrangement formation.

5,7-Dihydroxy-6-methylphthalide stored in a cool, blast of the treasury. Away from fire, calefaction source. Couvin should not beat 30℃. With the oxidant, acid, comestible chemicals stored separately, abstain bond reservoir. Use the explosion-proof lighting, blast facilities. Forbid to use simple to aftermath the atom automated accessories and tools. Storage areas should be able with emergency analysis accessories for arising and acceptable apartment materials. Closed operation, bounded bankrupt ventilation. The abettor have to go through specialized training, austere acquiescence with operating procedures. Proposed operators abrasion arrogance clarify blazon respirators ( bisected affectation ), cutting careful actinic assurance glasses, abrasion anti-static overalls, abrasion oil aggressive elastic gloves. Away from fire, heat, smoker is banned in the workplace. The use of explosion-proof blast systems and equipment. To anticipate beef arising in the air of workplace. Abstain acquaintance with oxidant, acid. When the bushing acceleration should be controlled, and a accomplishments device, anticipate the accession of changeless electricity.

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