${\displaystyle {\mathsf {NH_{3}+CO_{2}{\xrightarrow {varmo))H_{2}NCOOH_{karbamata\;acido))))$

${\displaystyle {\mathsf ((\underset {\;karbamata\;acido}{H_{2}NCOOH))+{\underset {\;amoniako}{NH_{3))}{\xrightarrow {varmo)){\underset {amonia\;karbamato}{H_{2}NCOONH_{4))))))$

${\displaystyle {\mathsf {NH_{2}CO_{2}NH_{4}\rightleftharpoons NH_{2}COONH_{2}\;(ureo)\;+H_{2}O))}$

${\displaystyle {\mathsf {NH_{2}CO_{2}NH_{4}{\xrightarrow {130^{o}C-140^{o}C))\;2\;NH_{3}\uparrow CO_{2}\uparrow ))}$

${\displaystyle {\mathsf {NH_{2}COONH_{4}+H_{2}O{\xrightarrow {varmo\;kaj\;premo))(NH_{4})_{2}CO_{3))))$

${\displaystyle {\mathsf {(NH_{4})_{2}CO_{3}{\xrightarrow {varmo))NH_{2}COONH_{4}+H_{2}O))}$

${\displaystyle {\mathsf {NH_{2}CO_{2}NH_{4}{\xrightarrow {130^{o}C-140^{o}C))\;2\;NH_{2}CONH_{2}+H_{2}O))}$