Title: Dicyanodiamide
CAS Registry Number: 461-58-5
CAS Name: Cyanoguanidine
Molecular Formula: C2H4N4
Molecular Weight: 84.08
Percent Composition: C 28.57%, H 4.80%, N 66.64%
Literature References: Prepared by controlled polymerization of cyanamide in water in the presence of ammonia, alkaline earth hydroxides, or other suitable bases: Grube, Nitsche, Z. Angew. Chem. 27, 368 (1914); Pinck, Hetherington, Ind. Eng. Chem. 27, 834 (1935); Pinck, Inorg. Synth. 3, 43 (1950).
Properties: Monoclinic prismatic crystals from water or alcohol, mp 209.5°. d425 1.400. Eutectic with cyanamide at 35.6° (15% dicyanodiamide). Specific heat 0.456 at 0-204°. Neutral reaction. Soly in water at 13°: 2.26%, more sol in hot water. Solns above 80° dec slowly, yielding ammonia. Soly in abs ethanol at 13°: 1.26%; in ether: 0.01%. Insol in benzene, chloroform. Sol in liq ammonia.
Melting point: mp 209.5°
Density: d425 1.400
Use: In the plastics industry (manuf of melamine). In the pharmaceutical industry (barbiturates, guanidine derivs).
Dicyanodiamidine Sulfate Dicyclohexylamine Dicyclomine Didanosine Didecyldimethylammonium Chloride

Skeletal formulaπ Ball-and-stick model
CAS number 461-58-5 YesY
PubChem 10005
ChemSpider 9611 YesY
EC number 207-312-8
RTECS number ME9950000
Jmol-3D images Image 1
Molecular formula C2H4N4
Molar mass 84.08 g/mol
Appearance White crystals
Density 1.400 g/cm3
Melting point 209.5 °C
Boiling point 252 °C
Solubility in water 41.3 g/l
log P -0.52
kH 2.25·10-10 atm.m³/mol
R-phrases R20/21/22
S-phrases S24/25
Main hazards harmful (Xn)
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

2-Cyanoguanidine is an nitrile derived from guanidine. It is a dimer of cyanamide, from which it can be prepared. 2-Cyanoguanidine is a colourless solid that is soluble in water, acetone, and alcohol, but not nonpolar organic solvents.[1]