Urea CH4N2O CAS: 57-13-6; 37955-36-5 Fertilizer 46% 46% nitrogen chiv

Xwm

Dawb columnar siv lead ua los yog crystalline hmoov, soluble nyob rau hauv concentrated hydrochloric acid, yuav luag insoluble nyob rau hauv ether, trichloromethane. Thaum rhuab saum lub melting point, nws yog decomposed rau hauv biuret, ammonia thiab cyanic acid.

Siv
1. Nitrogen chiv, urea yog qhov zoo tshaj plaws chiv rau topdressing sab nraum lub hauv paus, vim hais tias nws tsis muaj teeb meem cov khoom xyaw rau cov qoob loo, yog nruab nrab, tsis hlawv stems thiab nplooj, hygroscopic, yooj yim rau nkag mus rau hauv nplooj nrog dej, sai absorbed los ntawm cov qoob loo.
2. Pub ntxiv ntawm ruminants tuaj yeem txhim kho kev siv cov khoom noj thiab kev loj hlob ntawm cov ruminants thiab txo tus nqi pub.
3. kuaj antimony thiab tin, txiav txim siab txhuas, tooj liab, gallium, phosphorus, iodide, nitrate.

ruaj ntseg
1. Tsis txhob raug cov urea plua plav lossis vapor mus ntev thiab ua kom muaj cua zoo.
2. Tsis txhob kov cov tshuaj urea los yog urea plua plav, thiab hnav cov khoom tiv thaiv tus kheej xws li hnab looj tes tiv thaiv, tsom iav thiab qhov ncauj qhov ntswg thaum siv.
3. Sim zam kom tsis txhob noj urea thiab tsis txhob khaws urea hauv cov thawv ntim khoom noj ua yuam kev.
4. Nyob rau hauv rooj plaub uas raug urea yuam kev, tam sim ntawd yaug qhov chaw raug mob nrog dej thiab nrhiav kev pab kho mob.