High Purity 77-86-1 Fast Delivery Tris (hydroxymethyl) aminomethane

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High Purity 77-86-1 Fast Delivery Tris (hydroxymethyl) aminomethane

The composition method
First of all, nitromestane and polyformaldehyde according to a certain mole ratio of 1:3.3, first called polyformaldehyde 93g into 500ML four-mouth flask, add 85g methanol solvent, 0.3gKO H catalyst, and heat and stir until completely dissolved, slow drops and called good 55g nitro methane for condensation reaction, to maintain the reaction temperature of 40 to 55 degrees C, plus the maintenance of 3 to 4 hours (insulation of about 55 degrees C). At the end of the reaction, a pot of condensed material is put into an 1L autoclave, 350g methanol, 20g nickel catalyst is added, and check whether the autoclave is normal, and hydrogen replacement in the kettle, the power supply is switched on and the hydrogen is fed into the reduction reaction, the pressure remains 2 to 3Mp a, reaction temperature control 40 to 50 degrees C, hydrogenation end maintenance of 2 to 3 hours (insulation of about 50 degrees C), end of heating 60 degrees C static 1 hour, conversion rate of 98%, into 1000ML four-mouth flask, plus activated carbon 5g, Stir for 1 hour (insulation of about 50 degrees C) with the Cloth funnel filter, cooling crystallization out of the coarse 70g. Take the coarse 70g to add 500ML four-mouth flask, add deionized water 65g, activated carbon 5g, and heat and stir, heating to 80 degrees C to maintain 1 hour, with the Cloth funnel filter, cooling after the discharge, drying finished 65g, finished content 99.94%, absorbance (260nm) 0.043. The methanol content of the solution is 99%.

【Item name】Tris (hydroxymethyl) aminomethane
【Synonym】Tris base; Buffer Tris;Trisamine; Aminomethylidine Trimethanol
【CAS NO.】77-86-1
【Mol. Formula】 C4H11NO3
【Mol. Weight】 121.14                       
【Assay】≥99.5%
【Appearance】White crystalline powder  
【Packing】25kgs/drum (standard packing)
【Storage】Tight container, protect from light

Quality standard 

77-86-1 for sale Tris buffer Tris (hydroxymethyl) aminomethane Good Supplier In China

Trihydroxymethane methane buffer solution is not easy to store for a long time, low concentration of reserve liquid, the number of uses is also small, generally ready-to-use. CN201510468240.9 provides an open-to-use, easy-to-store, preparation method simple and fast preparation method of trihydroxymethyl methane buffer tablet preparation method. Here are the steps:

(1) Trihydroxymethylmethane methane, boric acid, EDTA, crosslinked straight chain starch, according to the weight ratio of 54:22:3.0:3.3 in order of accurate weighing. For example, trihydroxymethylmethane methane 540g, boric acid 220g, EDTA30g crosslinked straight-chain starch 33g, mixed well;

(2) pressed into tablets on the tablet press, pressing pressure of 2-4 tons, pressing 200 tablets, containing trihydroxymethylmethane methane, boric acid, EDTA, cross-linked straight chain starch, its weight ratio is 54:22:3.0:3.3;

(3) When used, a piece of water dissolved in 500 ml distillation, that is, PH8.0 buffer solution.