Pure Urea 56%

Urea

Urea;Carbamide;UR;Isourea;Carbamimidic acid;Carbonyl diamide;Urevert;Ureaphil;Ureophil;Pseudourea;B-I-K;Varioform II;Benural 70;Urepearl;Urea perhydrate;Urepeal;Keratinamin Kowa;Pastaron;Pastaron 20;Pastaron 20 soft;Urepeal L;Pastaron 10;Eucerin 10% Urea Lotion;Optigen 1200;Aquacare;Basodexan;Keratinamin;Aquadrate;Hyanit;Elaqua XX;Onychomal;Nutraplus;NSC 34375;Pastaron soft;Rubinol ST 010;Carmol 40;SGN 250;Uroderm;Ultra Low Biuret Urea;Low Biuret Urea;Duration III;ESN;Optigen II;Uria;Cellton NP;Cellpaste K 4;AUS 32;Onyster;Diesel exhaust fluid;DEF;DEF (diesel exhaust fluid);AdBlue;U 6504;30535-50-3;118548-06-4;860639-56-1;923953-70-2;1202865-46-0;1228376-38-2;1262769-89-0;1637232-71-3;2060607-07-8;2417243-36-6

57-13-6

CH4N2O

InChIKey=XSQUKJJJFZCRTK-UHFFFAOYSA-N

60.05530

60.06

200-315-5

8W8T17847W

0595

757375|34375

DTXSID4021426

C29531

White crystals or powder|Tetragonal prisms

B - Blood and blood forming organs|D - Dermatologicals

3102100001

Organic Reagents

69.11000

-1.4

white powder

1.3230 g/cm³ @ Temp: 20 °C

132.70 °C

317-389 °C

53.7±22.6 °C

1.528

1080 g/L (20 ºC)

<0.1 hPa (20 °C)

LD50 orally in Rabbit: 8471 mg/kg LD50 dermal Rat 8200 mg/kg

Reacts with sodium hypochlorite or calcium hypochlorite to form the explosive nitrogen trichloride.

MAY GRADUALLY DEVELOP SLIGHT ODOR OF AMMONIA, ESP IN PRESENCE OF MOISTURE

Cooling, saline taste

7.2 (10% solution)

0.1(at 21 °C)

pKa = 0.10 at 21 °C (conjugate acid)

Water soluble.

Amides and Imides

UREA is a weak base. Reacts with hypochlorites to form nitrogen trichloride which explodes spontaneously in air [J. Am. Chem. Soc. 63:3530-32]. Same is true for phosphorus pentachloride. It reacts with azo and diazo compounds to generate toxic gases. Reacts with strong reducing agents to form flammable gases (hydrogen). The heating of improper stoichiometric amounts of urea and sodium nitrite lead to an explosion. Heated mixtures of oxalic acid and urea yielded rapid evolution of gases, carbon dioxide, carbon monoxide and ammonia (if hot, can be explosive). Titanium tetrachloride and urea slowly formed a complex during 6 weeks at 80° C, decomposed violently at 90 C, [Chem. Abs., 1966, 64, 9219b]. Urea ignites spontaneously on stirring with nitrosyl perchlorate due to the formation of the diazonium perchlorate. Oxalic acid and urea react at high temperatures to form toxic and flammable ammonia and carbon monoxide gases, and inert CO2 gas [Von Bentzinger, R. et al., Praxis Naturwiss. Chem., 1987, 36(8), 41-42].

Not flammable (USCG, 1999)