Calcium cyanamide

CAS Number

156-62-7

EC Number

205-861-8

What is Calcium cyanamide?

Calcium cyanamide (CAS 156-62-7), commercially known as nitrolime or lime nitrogen, is a nitrogen-containing inorganic compound used as a slow-release nitrogen fertilizer and soil-conditioning agent in agriculture.

Where is Calcium cyanamide used?

Agriculture: combined fertilizer and herbicide applied directly to soil
Industrial processing: chemical intermediate and biocidal agent
Steel and metallurgy: desulfurization agent that reacts with sulfur impurities in molten metal
Mining: flotation reagent that selectively depresses certain sulfide minerals during ore separation
It serves as a precursor in the synthesis of dicyandiamide and other nitrogen-based chemicals.

Commercial specifications

Nitrogen content commonly around 19–21% N

Other Names (Synonyms)

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What are the physical properties of Calcium cyanamide?

Melting Point 1340 °C

Density 2.29 g/cm³ @ Temp: 20 °C

Appearance Calcium cyanamide is a blackish-gray, shiny crystalline material or powder.

Color Gray to dark gray

Odor Odorless

Form Powder

Water Solubility insoluble H2O, but undergoes hydrolysis releasing acetylene and ammonia [HAW93] [MER06]

Vapor Pressure 0.51Pa at 20℃

Log P -0.72 at 20℃

How is Calcium cyanamide classified and handled safely? Learn More

Danger

GHS05· Corrosive GHS07· Irritant GHS02· Flammable GHS08· Health Hazard GHS09· Environmental Hazard

Hazard Statements

H261 In contact with water releases flammable gas

H302 Harmful if swallowed

H313 May be harmful in contact with skin

H315 Causes skin irritation

Precautionary Statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P264 Wash … thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

Which trade and regulatory codes apply to Calcium cyanamide?

HS Code 31029010

UN Number 1403

ADR Class 4.3

Packing Group III

WGK (Germany) 2