AMMONIUM THIOCYANATE

PRODUCT IDENTIFICATION

CAS NO. 1762-95-4

AMMONIUM THIOCYANATE

EINECS NO. 217-175-6
FORMULA NH4SCN
MOL WT. 76.12

H.S. CODE

2842.90.1000
TOXICITY Oral Rat LD50: 750 mg/kg
SYNONYMS Thiocyanic acid ammonium salt; Amthio; Ammonium isothiocyanate;
Ammonium sulfocanide; Ammonium sulphocyanide; Ammonium rhodanide; Ammonium sulphocyanate; Ammonium rhodonide; Amthio; Ammonium sulfocyanate; Rhodanine ammonium salt; Other RN: 1189-67-9, 1674-80-2, 14314-30-8, 15268-45-8, 92568-90-6, 101218-28-4, 113506-91-5
SMILES

C(#N)[S-].[NH4+]

CLASSIFICATION

 

EXTRA NOTES

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

Colorless, deliquescent crystals

MELTING POINT

150 C

BOILING POINT  
SPECIFIC GRAVITY 1.31
SOLUBILITY IN WATER Soluble

SOLVENT SOLUBILITY

Soluble : acetone, alcohol, and ammonia

pH 4.5-6.0 (5% sol)
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 2 Flammability: 1 Reactivity: 1

REFRACTIVE INDEX

 

FLASH POINT 190 C
STABILITY Stable under ordinary conditions

EXTERNAL LINKS & GENERAL DESCRIPTION

Wikipedia Linking

Google Scholar Search

Drug Information Portal (U.S. National Library of Medicine) - Ammonium thiocyanate

PubChem Compound Summary - Ammonium thiocyanate

IPCS INCHEM -  Triazine herbicides

KEGG (Kyoto Encyclopedia of Genes and Genomes) -  Ammonium thiocyanate

http://www.ebi.ac.uk/ -  Ammonium thiocyanate

http://www.ncbi.nlm.nih.gov/ -  Ammonium thiocyanate

Local:
Cyanic acid (the isomer of fulminic acid) is an unstable (explosive), poisonous, volatile, clear liquid with the structure of H-O-CN (the oxoacid formed from the pseudohalogen cyanide), which is readily converted to cyamelide and fulminic acid. There is another isomeric cyanic acid with the structure of H-N=C=O, called isocyanic acid. Cyanate group (and isocyanate group) can react with itself. Cyanuric acid (also called pyrolithic acid), white monoclinic crystal with the structure of [HOC(NCOH)2N], is the trimer of cyanic acid. The trimer of isocyanic acid is called biuret.

  • Cyanic acid: H-N=C=O or H-O-CN
  • Fulminic acid: (H-C=N-O) or H-CN-O
  • Isocyanic acid: H-N=C=O
  • Cyanuric acid: HOC(NCOH)2N
  • Biuret: (NH2)CO)2 NH

Cyanic acid hydrolyses to ammonia and carbon dioxide in water. The salts and esters of cyanic acid are cyanates. But esters of normal cyanic acid are not known. The salts and esters of isocyanic acid are isocyanates. The isocyanate group reacts with the hydroxyl functional group to form a urethane linkage. Diisocyanates (or polyisocyanates) are monomers for polyurethane production. Polyurethane is made from a variety of diisocyanates in conjunction with polyether and polyester polyols as co-reactants by addition polymerization which needs at least two -N=C=O groups. Polyurethanes are widely used in the manufacture of flexible and rigid foams, fibres, coatings, and elastomers. If isocyanate monomer is polymerized with amine group, polyurea is produced. Cyanates (or Isocyanates) are readily reacts with various form of amine (including ammonia, primary-, secondary-amines, amides and ureas) and hydroxyl functional group. They are used in the synthesis for the target molecules such as pharmaceuticals, pesticides, textile softener, lubricants and industrial disinfectants. They can convert to polycyclic compounds such as hydantoins and imidazolons. They are used as plastic additives and as heat treatment salt formulations for metals.

Thiocyanate is a salt or ester of thiocyanic acid (HSCN). Aqueous solutions of thiocyanic acid , also called sulfocyanic acid, are very strong acids of the  equilibrium mixture of thiocyanic and isothiocyanic. Thiocyanates are bonded through the sulfur(s) with the structure R-S-CN or the isomeric R-N=C=S (isothiocyanates). Thiocyanates are bonded through the sulfur(s) which replace for the oxygen (O) atom. Thiocyanates are the sulfur analog of isocyanates. Organic as well as metallic thiocyanates [CuSCN, Ca(SCN)2, NaSCN, KSCN] are very versatile compounds. Isothiocyanates act as electrophiles with the carbon atom as the electrophilic center. They have wide range of applications as an intermediate to create a desired chemical compound through a series of chemical reactions for the industrial field includingf fungicide, bactericide, wood preservative, pharmaceutical and plastic and rubber. Some isothiocyanates are used in freezing solutions, fabric dyeing, electroplating, steel pickling, printing, and corrosion inhibitor against acid gases. They are used in photography industry as a stabilizer or accelerator. Certain isothiocyanates, such as phenethyl isothiocyanate and sulforaphane are known as chemopreventive agents against the development and proliferation of cancers. Allyl isothiocyanate, called mustard oil, shows also anti-tumor and anti-oxidant properties by inducing the activity of phase II detoxification enzymes in the urinary bladder.

Ammonium Thiocyanate has many uses in manufacturing chemicals such as metal thiocyanates[CuSCN, Ca(SCN)2, NaSCN, KSCN], a number of pharmaceutical and pesticides. It is used in freezing solutions, fabric dyeing, electroplating, steel pickling, printing, and corosion inhibitor against acid gases. It is used in photography industry as a stabilizer or accelerator.

SALES SPECIFICATION

APPEARANCE

crystalline powder

ASSAY

99.0% min

CHLORIDES

0.03% max

SULFATES

0.02% max

HEAVY METALS

20ppm max

Fe

5ppm max

pH

4.5 - 6.0 (5% sol)

AQUEOUS SOLUTION

ASSAY

49.0 - 51.0%

CHLORIDES

0.03% max

SULFATES

0.02% max

HEAVY METALS

20ppm max

Fe

5ppm max

pH

4.5 - 6.0 (5% sol)

TRANSPORTATION

PACKING 25kgs in bag, 250kgs in drum
HAZARD CLASS  
UN NO. 9092
SAFETY INFORMATION

HAZARD OVERVIEW

 

GHS

 

SIGNAL WORD

Warning

PICTOGRAMS

HAZARD STATEMENTS

H302-H312-H332-H412

P STATEMENTS

P273-P280

EC DIRECTIVES

 

HAZARD CODES

RISK PHRASES

20/21/22-32-52/53

SAFETY PHRASES

13-61

PRICE INFORMATION