Hydrogen Cyanamide

Identification

Synonyms: Cyanamide; Cyanogenamide; Dormex; amidocyanogen; carbodiimide; hydrogen cyanamide; Carbimide; Carbamonitrile; Carbodiamide; aminomethanenitrile; 'Fermex' (Fertiagro). Other products 'Alzodef' (Evonik); 'Breaker' (New Zealand) (Nufarm Ltd); 'Dormex' (Alzchem, Arysta LifeScience EAME); 'Hi-Cane' (New Zealand) (Nufarm Ltd).
CAS No.: 420-04-2
EC No.: 206-992-3
RTECS No.: GS5950000
Molecular Weight: 42.04
Molecular Formula: CH2N2
Structural Formula:
M.p.: 45-46°C
B.p.: 83°C/0.5 mmHg
F.p.: 207°C
Form: technical grade is colourless, hygroscopic crystals. Aqueous form is popular
V.p.: 500 mPa (20 °C)
Kow: logP = –0.82 (20 °C)
Henry: 4.58 × 10-6 Pa m3 mol-1 (calc.)
S.g./density 1.282 (20 °C)
Solubility: In water 4.59 kg/l (20 °C). Soluble in alcohols, phenols and ethers. Sparingly soluble in benzene and halogenated hydrocarbons. Practically insoluble in cyclohexane. In methyl ethyl ketone 505, ethyl acetate 424, n-butanol 288, chloroform 2.4 (all in g/kg, 20 °C).
Stability: Stable to light. Decomposed by alkalis (with the formation of dicyandiamide and polymerisation) and acids (with the formation of urea). On heating to 180 °C, dicyandiamide is formed, and polymerisation commences.

Application

Hydrogen Cyanamide 520g/l SL is a plant growth regulator (rest-breaking agent) to promote bud break of grape and other plants specially grown in tropical and subtropical where cold weather is unavailable and chilling units accumulated are not enough. Cyanamide has the same effects for fruits and potatoes in greenhouse. Normally it can advance 2-4 weeks for bud-break and 2-3 weeks for harvest. Cyanamide can also be used as germicide, defoliator and herbicide.

Specification*

Appearance	colorless to pale yellow clear liquid, or blue (optional)
Hydrogen Cyanamide Content	520g/l min.
Dicyandiamide	2.0% max.
Thiourea	0.2% max.
pH value	4.0-6.0

 

Standard Packaging

Risks and Safety Information