333-20-0
Potassium thiocyanate
CAS: 333-20-0
Molecular Formula: CKNS
333-20-0 - Names and Identifiers
| Name | Potassium thiocyanate |
| Synonyms | Rhocya Rodanca Kyonate Aterocyn Arterocyn Rhodanide Potassium rhodanide potassiumthiocyanide Potassium thiocyanate Potassium thiocyanide potassium (thioxomethylidene)azanide |
| CAS | 333-20-0 |
| EINECS | 206-370-1 |
| InChI | InChI=1/CNS.K/c2-1-3;/q-1;+1 |
333-20-0 - Physico-chemical Properties
| Molecular Formula | CKNS |
| Molar Mass | 97.18 |
| Density | 1.886 |
| Melting Point | 173 °C (lit.) |
| Boling Point | 500°C |
| Flash Point | 500°C |
| Water Solubility | 2170 g/L (20 ºC) |
| Solubility | 1g dissolved in 0.5 ml of acetone, 12ml of ethanol and 8ml of boiling ethanol. Soluble in water. |
| Vapor Presure | <0.001 hPa (20 °C) |
| Appearance | Colorless crystal |
| Specific Gravity | 1.886 |
| Color | colorless or white |
| Odor | Odorless |
| Exposure Limit | NIOSH: IDLH 25 mg/m3 |
| Merck | 14,7691 |
| BRN | 3594799 |
| PH | 5.3-8.7 (25℃, 50mg/mL in H2O) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with nitric acid, strong oxidizing agents, active halogen compounds. |
| Sensitive | Hygroscopic |
| MDL | MFCD00011413 |
| Physical and Chemical Properties | Character: colorless monoclinic crystal. melting point 172.3 ℃ relative density 1.886 solubility soluble in water, and due to a large number of endothermic temperature. Also soluble in alcohol and acetone. |
| Use | For pesticides, pharmaceuticals, electroplating, chemical reagents |
333-20-0 - Risk and Safety
| Risk Codes | R32 - Contact with acids liberates very toxic gas R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | 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. S46 - If swallowed, seek medical advice immediately and show this container or label. |
| WGK Germany | 1 |
| RTECS | XL1925000 |
| TSCA | Yes |
| HS Code | 28380000 |
| Hazard Note | Irritant/Hygroscopic |
| Toxicity | LD50 orally in mice, rats: 594, 854 mg/kg, Andersen, Chen, J. Am. Pharm. Assoc. 29, 152 (1940) |
333-20-0 - Upstream Downstream Industry
| Raw Materials | Carbon disulfide Ammonia |
| Downstream Products | 2-Mercapto-1-methylimidazole |
333-20-0 - Reference
| Reference Show more | 1. Huang Renshu, Hu Xiaomeng, He Huili. Optimization of ultrasonic-assisted extraction of isoflavones from Pueraria lobata by response surface methodology and determination of reducing power [J]. Chinese Pharmaceutical Journal, 2015, 50(001):51-57. 2. Chen Shanglong, Chen Anhui, Liu Hui, etc. Analysis of the effect of yogurt fermentation on calcium speciation by using digestive system full bionic model [J]. Journal of Agricultural Engineering, 2018, v.34;No.332(05):297-302. |
333-20-0 - Reference Information
Open Data Unverified Data
| pH indicator color change ph range | 5.3 - 8.7 at 97.2g/l at 25 c |
| LogP | 0.58 |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Potassium thiocyanate, the molecular formula is KSCN, also known as potassium thiocyanate, English Potassium Thiocyanate, is a colorless monoclinic crystal. Relative density 1.886. The melting point is about 172.3 ℃. It is easily soluble in water and cools down due to a large amount of heat absorption. It is also soluble in alcohol (ethanol) and acetone. Semi-aqueous crystals can be obtained at low temperatures (KSCN. 0.5H2O), stable at -29-6.8 ℃, burning to about 430 and turning blue, but turning colorless again after cold. Decompose when heated to 500. It meets Fe3 (iron salt) to generate blood-red iron thiocyanate complex ion FeSCN2 (iron thiocyanate), which is a very sensitive method for testing Fe3 ions and can eliminate the influence of all other metal ions currently known. Does not react with ferrous salts. Easy deliquescence, should be sealed. There is low toxicity. But potassium cyanate is a highly toxic substance, and the country has restricted production. |
| solubility in water (g/100ml) | dissolution grams per 100ml 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 standard | quality standard TS0405-16 index name superior product first-class qualified product KSCN content (dry product) ≥% 99.0 98.0 97.0 solution appearance clear transparent PH value 6-8 chloride,% ≤ 0.015 0.02 0.02 sulfate,% ≤ 0.02 0.02 0.04 heavy metal (Pb),% ≤ 0.002 0.002 0.002 iron (Fe),% ≤ 0.0001 0.0002 0.0008 moisture,% ≤ 1.0 1.8 2.0 |
| toxicity | see sodium thiocyanate. |
| Use | Used as a deplating agent and refrigerant in the electroplating industry, also used for dye, photography, pesticide and steel analysis, and also used for the manufacture of mustard oil and drugs Used as a reagent for the determination of barium and sulfate Used as an analytical reagent and refrigerant, it is also used in the pharmaceutical industry, dye industry, mustard oil manufacturing and photography industry It is used as a deplating agent in the electroplating industry, and can also be used as a refrigerant. It is also used in dye industry, photography industry, pesticide and steel analysis. prepare thiocyanate titration solution. Verification of trivalent iron, copper and silver. Urine test. Tungsten developer. An indicator for the volumetric determination of titanium. Refrigerant. Photographic thickening agent. |
| production method | ammonium thiocyanate conversion method carries out pressure synthesis reaction between carbon disulfide and ammonia water to generate ammonium thiocyanate and by-product ammonium thiocyanate, then decomposes ammonium hydrosulfide into hydrogen sulfide after desulfurization and evaporation, and slowly adds potassium carbonate solution at the liquid temperature of 105 ℃ to generate potassium thiocyanate. A large amount of carbon dioxide and ammonia will be produced during the reaction. Ammonia can be recycled and used. The reaction solution is filtered, the insoluble matter is removed and evaporated under reduced pressure, and then cooled, crystallized, and centrifuged to obtain industrial potassium thiocyanate. Its CS2 3NH3 → NH4SCN NH4HSNH4HS → NH3 ↑ H2S ↑ 2NH4SCN K2CO3 → 2KSCN (NH4)2CO3(NH4)2CO3 → 2NH3 ↑ CO2 ↑ H2O |
Last Update：2024-04-09 19:43:38
333-20-0 - Nature
Open Data Verified Data
colorless crystals. Deliquescence. Melting point approximately 173 °c; d 1.89. 19 The product is dissolved in 12ml ethanol, 8ml boiling ethanol, 0.5ml acetone. Soluble in water, its aqueous solution is neutral. Deliquescence in air. And a large number of heat absorption and cooling. Semi-aqueous crystals can be obtained at low temperature, stable AT -29. 5~6.8 ℃, blue when hot to about 430 ℃, and colorless again after cold. Heated to 500 ° C decomposition, release of toxic cyanide and sulfide smoke.
Last Update：2024-01-02 23:10:35
333-20-0 - Preparation Method
Open Data Verified Data
ammonium thiocyanate was dissolved in water and potassium hydroxide was dissolved in water, and the two solutions were mixed with stirring. After heating and filtration, the filtrate was evaporated until crystallization occurred, which was cooled, crystallized and dried.
Last Update：2022-01-01 09:03:03
333-20-0 - Introduction
Easy to absorb moisture, agglomerate and liquefy. It turns brown when it melts, then gradually turns green, and still turns white after cooling. When dissolved in water by its own weight, the temperature drops by about 30°C. The aqueous solution is neutral. Low toxicity, half lethal dose (rat, oral) 854mg/kg.
Last Update：2022-10-16 17:24:41
333-20-0 - Use
Open Data Verified Data
An Analytical reagent for the identification of ferric iron, copper, and silver and for urine testing is also an indicator of the capacity of titanium. In the electroplating industry as de-plating agent, refrigerant; Can also be used in the dye industry, photo industry, pesticide and other fields.
Last Update：2022-01-01 09:03:03
333-20-0 - Safety
Open Data Verified Data
- mouse oral LDso:590mg/kg; Rat oral LDso:854mg/kg. Large doses lead to acute poisoning, can cause Nausea, Vomit, Abdominal Pain, Diarrhea and other gastrointestinal disorders, blood pressure fluctuations, heart rate slowed. Store in a cool, ventilated warehouse. Keep away from fire and heat source. Not co-stored with acids and foodstuffs.
- It is packed in a dry plastic drum or plywood drum lined with a plastic bag, with a net weight of 25kg and 40kg per barrel. This product is easily deliquescent in the air, should be stored in a cool, dry place. Should pay attention to moisture, do not pressure, to prevent the lid and broken barrels. It is not allowed to be stored and mixed with acid and edible articles. Transport should be protected from rain and sun exposure. Toxicity and protection: see sodium thiocyanate.
Last Update：2022-01-01 09:03:04
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View History
Raw Materials for 333-20-0
Downstream Products for 333-20-0