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Ammonium thiocyanate

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Name

Ammonium thiocyanate

EINECS 217-175-6
CAS No. 1762-95-4 Density 1.3
PSA 65.83000 LogP 0.72118
Solubility water: 163 g/100 mL (20 °C) Melting Point 152-154 °C(lit.)
Formula NH4SCN Boiling Point 146 °C at 760 mmHg
Molecular Weight 76.12 Flash Point 42.1 °C
Transport Information Appearance colourless or white crystals or powder
Safety 13-61-36/37-36-26 Risk Codes 20/21/22-32-52/53-36/37/38
Molecular Structure Molecular Structure of 1762-95-4 (Ammonium thiocyanate) Hazard Symbols HarmfulXn,IrritantXi
Synonyms

Ammonium rhodanide;Rhodanine, ammonium salt;Thiocyanic acid ammonium salt;Ammonium sulfocyanate;Thiocyanic acid,compounds,ammonium salt;Thiocyanates;Amthio;Rhodanid;Usaf ek-p-433;Ammonium rhodanate;

 

Ammonium thiocyanate Chemical Properties

Structure of Ammonium thiocyanate (CAS NO.1762-95-4):

IUPAC Name: azane; thiocyanic acid 
Empirical Formula: CH4N2S
Molecular Weight: 76.1209 
EINECS: 217-175-6 
Flash Point: 42.1 °C
Enthalpy of Vaporization: 38.3 kJ/mol 
Melting Point: 152-154 °C(lit.)
Boiling Point: 146 °C at 760 mmHg
Vapour Pressure: 4.73 mmHg at 25°C 
Water Solubility: 163 g/100 mL (20 ºC)
Sensitive: Light Sensitive & Hygroscopic 
Appearance: colourless or white crystals or powder
Stability: Stable. Incompatible with strong acids, strong oxidizing agents. Forms explosive mixtures with lead nitrate. 
Product Categories: Industrial/Fine Chemicals;straight chain compounds;Inorganics 
Synonyms of Ammonium thiocyanate (CAS NO.1762-95-4): Ammonium isothiocyanate ; Ammonium rhodanate ;
 Ammonium sulfocyanate ; Ammonium sulfocyanide ; Ammoniumrhodanid ; Rhodanine, ammonium salt ; Thiocyanic acid, ammonium salt  

Ammonium thiocyanate Uses

 Ammonium thiocyanate (CAS NO.1762-95-4) is used in the manufacture of thiourea,herbicides,and transparent artificial resins. And it is used as a stabilizing agent in photography,and is used in various rustproofing compositions. It is also used as an adjuvant in textile dyeing and printing; as a tracer in oil fields; in the separation of hafnium from zirconium, and in titrimetric analyses.

Ammonium thiocyanate Production

 Ammonium thiocyanate (CAS NO.1762-95-4) is made in the United States by the reaction of carbon disulfide with aqueous ammonia. Ammonium dithiocarbamate is formed as an intermediate in this reaction, which upon heating, decomposes to ammonium thiocyanate and hydrogen sulfide.
CS2 + 2 NH3(aq) → NH2C(=S)SNH4 → NH4SCN + H2S

Ammonium thiocyanate Toxicity Data With Reference

1.    

orl-hmn TDLo:430 mg/kg:GIT,CNS

    DAKMAJ    Deutsches Archiv fuer Klinische Medizin. 102 (1911),606.
2.    

orl-rat LD50:750 mg/kg

    GTPZAB    Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 30 (10)(1986),51.
3.    

orl-mus LD50:500 mg/kg

    GTPZAB    Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 30 (10)(1986),51.
4.    

ipr-mus LDLo:500 mg/kg

    NTIS**    National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD277-689 .
5.    

orl-mus LD50:500 mg/kg

    GTPZAB    Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 30 (10)(1986),51.
6.    

ipr-mus LD50:500 mg/kg

    NTIS**    National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD277-689 .
7.    

orl-gpg LD50:500 mg/kg

    GTPZAB    Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 30 (10)(1986),51.

Ammonium thiocyanate Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Ammonium thiocyanate Safety Profile

Hazard Codes: HarmfulXn,IrritantXi
Risk Statements: 20/21/22-32-52/53-36/37/38 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R32:Contact with acid liberates very toxic gas. 
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 13-61-36/37-36-26 
S13:Keep away from food, drink and animal foodstuffs. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S36/37:Wear suitable protective clothing and gloves. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: 9092
WGK Germany: 1
RTECS: XK7875000
F: 3
HS Code: 28380000
Poison by ingestion and intraperitoneal routes. Human systemic effects by ingestion: hallucinations and distorted perceptions, nausea or vomiting, and other gastrointestinal effects. See also THIOCYANATES. When heated to decomposition it emits toxic fumes of NH3, NOx, SOx, and CN?. Incompatible with KClO3 and mixtures with Pb(NO3)2.

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