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Potassium thiocyanate

Outline Solubility in water (g / 100ml) Reference quality standards Chemical properties Uses Production method
Potassium thiocyanate
Potassium thiocyanate
Chemical Name:
Potassium thiocyanate
Rhocya;Rodanca;Kyonate;Aterocyn;Thio-cara;Rhodanide;Arterocyn;SULFOCYANATE;Kaliumthiocyanat;POTASSIUM THIOCY
Molecular Formula:
Formula Weight:
MOL File:

Potassium thiocyanate Properties

Melting point:
173 °C(lit.)
Boiling point:
Flash point:
storage temp. 
Store at RT.
H2O: 8 M at 20 °C, clear, colorless
colorless or white
5.3-8.7 (25℃, 50mg/mL in H2O)
Water Solubility 
2170 g/L (20 ºC)
Stable. Incompatible with nitric acid, strong oxidizing agents, active halogen compounds.
CAS DataBase Reference
333-20-0(CAS DataBase Reference)
NIST Chemistry Reference
Potassium thiocyanate(333-20-0)
EPA Substance Registry System
Thiocyanic acid, potassium salt(333-20-0)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,Xi
Risk Statements  32-52/53-20/21/22
Safety Statements  13-61-36/37-46
WGK Germany  1
RTECS  XL1925000
Hazard Note  Irritant/Hygroscopic
HS Code  28380000
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501
H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312
H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P321 Specific treatment (see … on this label).
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

Potassium thiocyanate price More Price(23)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.05125 Potassium thiocyanate 333-20-0 1EA $86.5 2017-11-08 Buy
Sigma-Aldrich 1.05124 Potassium thiocyanate 333-20-0 1EA $106 2017-11-08 Buy
Alfa Aesar 14318 Potassium thiocyanate, ACS, 98.5% min 333-20-0 100g $41.7 2017-11-08 Buy
Alfa Aesar 14318 Potassium thiocyanate, ACS, 98.5% min 333-20-0 500g $84.3 2017-11-08 Buy
Strem Chemicals 93-1952 Potassium thiocyanate, 99+% (ACS) 333-20-0 250g $53 2017-11-27 Buy

Potassium thiocyanate Chemical Properties,Uses,Production


Potassium thiocyanate, molecular formula is KSCN, it is also known as KSCN, English is Potassium Thiocyanate, it is colorless monoclinic crystal. The relative density is 1.886. Melting point is about 172.3 ℃. It is soluble in water and it can cool because of the absorption of heat, it is also soluble in alcohol (ethanol) and acetone. Crystalline hemihydrate (KSCN.0.5H2O) can be obtained at low temperature, it is steady at-29-6.8℃, and it can turn blue when be broiled at about 430℃, but it then re-becomes colorless when be colded. When be heated to 500℃, it can decompose. The blood red ferric thiocyanate complex ion FeSCN2 + (iron thiocyanate) can generate in case of Fe3 + (ferric), which is the sensitive method to test the Fe3 + ion, the method can eliminate the influence of all other known metal ions. And it can not react with ferrous salts. It is hygroscopic, and it should be sealed. It has low toxicity. But potassium cyanate is highly toxic substances, the country has limited its production.

Solubility in water (g / 100ml)

The grams which dissolved in per 100 ml of water at different temperatures (℃) :
177g/0 ℃; 198g/10 ℃; 224g/20 ℃; 255g/30 ℃; 289g/40 ℃
372g/60 ℃; 492g/80 ℃; 571g/90 ℃; 675g/100 ℃

Reference quality standards

Chemical properties

It is colorless monoclinic crystal. It is soluble in water, and it can cool because of the absorption of heat. It is also soluble in alcohol and acetone.
The above information is edited by the chemicalbook of Wang Xiaodong.


It can be used in electroplating industry for stripping agent, it can also be used refrigerant. It can also be used in the dye industry, photographic industry, pesticides and steel analysis.

Production method

The mothod of ammonium thiocyanate transformation which is the pressurized synthesis reaction of carbon disulfide and ammonia can generate ammonium thiocyanate and the by-product is ammonium hydrosulfide, and then by desulfurization, ammonium hydrosulfide can evaporate and remove which is decomposed into hydrogen sulfide, when potassium carbonate solution is added into the temperature of 105℃ liquid, it can generates potassium thiocyanate. The reaction process will produce large amount of carbon dioxide and ammonia. Ammonia is recyclable, the reaction solution is filtered to remove insoluble material, and then reduction vaporization is proceeded, and then cooling and crystallization, centrifugal separation is proceeded to obtain industrial potassium thiocyanate.
CS2 + 3NH3 → NH4SCN + NH4HS
NH4HS → NH3 ↑ + H2S ↑
2NH4SCN + K2CO3 → 2KSCN + (NH4) 2CO3
(NH4) 2CO3 → 2NH3 ↑ + CO2 ↑ + H2O

Chemical Properties

white crystalline powder


Analysis of siliver ion; indirect determination of chloride, bromide, and iodide.


manufacture of artificial mustard oil; printing and dyeing textiles; in photography as intensifier; in analytical chemistry. The sodium salt now is replacing it for most of these uses.


ChEBI: A potassium salt which is the monopotassium salt of thiocyanic acid.

Potassium thiocyanate Preparation Products And Raw materials

Raw materials

Preparation Products

Potassium thiocyanate Suppliers

Global( 212)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
0592-6210733 CHINA 3168 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96820 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40398 62
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30309 84
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 China 3434 62
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Beijing Ouhe Technology Co., Ltd +86-10-4006331231;+86-10-51280831;+86-10-82967028
+86-10-82967029 China 10814 60
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 China 10090 60
Jia Xing Isenchem Co.,Ltd 0573-85280080,15157346371
0573-85285100,QQ:2446116053 China 9589 66
Secco work (Beijing) chemical technology co., LTD 010-69755668;
010-69755668 China 3546 54

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