Methylene diurea

Methylene diurea
Names
	Preferred IUPAC name N,N′′-Methylenediurea
	Other names methylenebis(urea), (carbamoylamino)methylurea
Identifiers
CAS Number	13547-17-6;
3D model (JSmol)	Interactive image;
Beilstein Reference	1812254
ChEBI	CHEBI:10790;
ChemSpider	55553;
ECHA InfoCard	100.033.547
EC Number	236-918-5;
Gmelin Reference	694187
KEGG	C06381;
PubChem CID	61645;
UNII	TT2013TAE9;
CompTox Dashboard (EPA)	DTXSID6042155 ;
	InChI InChI=1S/C3H8N4O2/c4-2(8)6-1-7-3(5)9/h1H2,(H3,4,6,8)(H3,5,7,9) Key: KQVLODRFGIKJHZ-UHFFFAOYSA-N;
	SMILES C(NC(=O)N)NC(=O)N;
Properties
Chemical formula	C3H8N4O2
Molar mass	132.123 g·mol−1
Appearance	white solid
Melting point	203 °C (397 °F; 476 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Methylene diurea (MDU) is the organic compound with the formula CH₂(NHC(O)NH₂)₂. It is a white water-soluble solid. The compound is formed by the condensation of formaldehyde with urea. Methylene diurea is the substrate for the enzyme methylenediurea deaminase.

Applications

MDU is an intermediate in the production of urea-formaldehyde resins.^[1]

^ Steinhof, Oliver; Kibrik, Éléonore J.; Scherr, Günter; Hasse, Hans (2014). "Quantitative and qualitative1H, 13C, and15N NMR spectroscopic investigation of the urea-formaldehyde resin synthesis". Magnetic Resonance in Chemistry. 52 (4): 138–162. doi:10.1002/mrc.4044. PMID 24496721. S2CID 1457586.
^ Dittmar, Heinrich; Drach, Manfred; Vosskamp, Ralf; Trenkel, Martin E.; Gutser, Reinhold; Steffens, Günter (2009). "Fertilizers, 2. Types". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.n10_n01. ISBN 978-3527306732.