In this article, we will delve into the characteristics of urea, its behavior in varying temperatures and humidity levels, as well as its interactions with different substances. By understanding these aspects, we can gain valuable insights into the fascinating nature of urea.

The Influence of Temperature and Humidity

Urea's behavior is greatly influenced by temperature and humidity. Below 20℃ and with a relative humidity below 70%, urea does not absorb moisture. On the contrary, it promotes water evaporation and reduces its own water content. However, as the temperature rises above 20℃ and the relative humidity exceeds 80%, urea begins to absorb moisture. In severe cases, it can become mushy. Furthermore, when the surrounding air becomes dry, urea tends to re-agglomerate, second only to ammonium nitrate in its moisture-absorbing properties.

Hydrolysis and Decomposition at High Temperatures

When a urea aqueous solution reaches 80℃, hydrolysis and decomposition reactions take place. These reactions result in the formation of ammonium carbamate, ammonia gas, and carbon dioxide. The hydrolysis and decomposition processes are accelerated in the presence of acidic or alkaline conditions, further contributing to urea's transformation when exposed to heat.

Urea's Affinity for Compound Formation

Urea readily combines with straight-chain carbohydrates to form crystal add-on compounds. Additionally, it can form double salts with various inorganic compounds, including Ca(NO3)2·4CO(NH2)2, NH4Cl·CO(NH2)2, CaSO4·4CO(NH2)2, MgSO4·4CO(NH2)2·3H2O, and Mg(NO3)·4CO(NH2)2·2H2O. Furthermore, urea can react with monocalcium phosphate, resulting in the production of urea phosphate, dicalcium phosphate, and water. This reaction can be represented as follows: Ca(H2PO4)2·H2O+CO(NH2)2→H3PO4·CO(NH2)2+CaHPO4+H2O.

Reactions with Nitric Acid and Formaldehyde

Urea exhibits interesting reactions when combined with nitric acid and formaldehyde. When urea reacts with nitric acid, relaxed urea nitrate is produced: CO(NH2)2+HNO3→CO(NH2)2·HNO3. On the other hand, urea can form compounds with formaldehyde, particularly urea formaldehyde compounds, also known as urate gum. Among these compounds, urea resin has a high formaldehyde ratio, while urea itself has a low formaldehyde ratio.

Urea for Sale CAS: 57-13-6

Molecular formula CH4N2O

Molecular weight 60.06

EINECS number 200-315-5

Melting point 132-135°C(lit.)

Boiling point 332.48°C(estimate)

Density 1.335g/mLat25°C(lit.)

Vapor pressure < 0.1 hPa (20 ° C)

Refractive index n20/D1.40

Storage conditions 2-8°C

Solubility H2O:8Mat20°C

Morphology powder

Acidity coefficient (pKa)0.10(at25℃)

Color white

Specific gravity 1.335

PH 8.0-10.0(20℃,8MinH2O)

The Odor is almostodorless

Water solubility 1080g/L(20ºC)

Maximum wavelength (λmax)λ:260nmAmax:0.03λ:280nmAmax:0.02

Merck 14,9867

BRN 635724

Stability  substances to be avoided include strong oxidizing agents. Protect from moisture.

InChIKeyXSQUKJJJFZCRTK-UHFFFAOYSA-N

LogP-1.660 (est)

Urea for Sale: An Exceptional Nitrogen Fertilizer

Introduction

Urea stands as a vital nitrogen fertilizer renowned for its superior quality and efficiency. Initially utilized in Germany as a fertilizer after World War I, urea has proven to be highly beneficial for all crops. Its high nitrogen content and absence of side components contribute to significant yield increases. Over time, urea has emerged as a prominent nitrogen fertilizer variety, surpassing ammonium nitrate in popularity. In this article, we will delve into the properties, application, and advantages of urea as a nitrogen fertilizer.

Urea's Rise in Agricultural Importance

Urea's journey as a preferred nitrogen fertilizer began in the 1950s. From 1960 to 1975, global urea production witnessed a remarkable increase of 10.5 times. Consequently, urea gradually replaced ammonium nitrate, securing its position as the most widely used nitrogen fertilizer worldwide. The exceptional growth in urea production signifies its recognition as an