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Potassium Cyanide

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Identification
Molecular formula
KCN
CAS number
151-50-8
IUPAC name
potassium;cyanide
State
State

At room temperature, potassium cyanide is a solid. It is usually encountered in the form of granules or as a crystalline salt.

Melting point (Celsius)
634.50
Melting point (Kelvin)
907.70
Boiling point (Celsius)
1 625.00
Boiling point (Kelvin)
1 898.00
General information
Molecular weight
65.12g/mol
Molar mass
65.1160g/mol
Density
1.5200g/cm3
Appearence

Potassium cyanide appears as a white crystalline solid. It resembles sugar in appearance and is highly soluble in water.

Comment on solubility

Solubility of Potassium Cyanide

Potassium cyanide (KCN) is known for its significant solubility in water, which makes it a compound of interest in various chemical applications.

Key Solubility Characteristics:

  • Highly Soluble: KCN can dissolve in water at a concentration of about 1.5 grams per milliliter at room temperature.
  • Polar Solvent Interaction: The solubility is largely due to the ionic nature of KCN, where the K+ cation and CN- anion interact favorably with polar water molecules.
  • Temperature Effects: The solubility increases with temperature, meaning that heating the solution can enhance dissolution rates.

Moreover, KCN’s solubility can lead to the formation of various complexes with metal ions when mixed with other solutions, which is an important consideration in industrial processes. It’s essential to handle this compound with care due to its toxicity and the implications of its high solubility, as significant amounts can quickly enter aquatic environments.

In summary, the solubility of potassium cyanide in water is a critical factor in its reactivity and applications, making it a compound that requires careful management and handling.

Interesting facts

Interesting Facts about Potassium Cyanide

Potassium cyanide (KCN) is a fascinating and highly relevant compound, particularly within the fields of chemistry and toxicology. Here are some key details that highlight its importance:

  • Highly Toxic: Potassium cyanide is notorious for its high toxicity. It acts as a potent inhibitor of cellular respiration by blocking the electron transport chain, which can lead to rapid respiratory failure. It is imperative to handle this compound with extreme care.
  • Uses in Industry: Despite its dangerous nature, potassium cyanide has several legitimate applications. It is used in gold and silver mining processes to extract metals from ores, in electroplating, and in various chemical synthesis reactions.
  • Historical Context: This compound has a dark history and has been associated with various criminal cases and even suicides due to its lethality. Many literary works reference its use, often symbolizing despair or malice.
  • Detection and Safety: Due to its toxicity, there are strict regulations regarding the storage and handling of potassium cyanide. Toxicology protocols are in place to ensure safety in laboratories and industrial settings.
  • Biological Relevance: Research into potassium cyanide also extends into studies exploring its effects on biological systems. Scientists use it in controlled settings to examine metabolic pathways and the mechanisms of cellular respiration.

As we delve deeper into the world of chemical compounds, understanding both the beneficial and hazardous aspects of substances like potassium cyanide is crucial. Always remember the quote: "With great power comes great responsibility." This holds true for chemists and researchers dealing with compounds that possess such potent effects!

Synonyms
POTASSIUM CYANIDE
151-50-8
Cyanide of potassium
kalium cyanid
potassium;cyanide
Potassium cyanide (K(CN))
Caswell No. 688A
RCRA waste number P098
Cyanure de potassium
Kaliumcyanid
Kaliumzyanid
Zyankali
HSDB 1245
UNII-MQD255M2ZO
M-44 capsules (potassium cyanide)
EINECS 205-792-3
MQD255M2ZO
EPA Pesticide Chemical Code 599600
BRN 4652394
KALI CYANATUM
KCN
AI3-28749
DTXSID0024268
CHEBI:33191
EC 205-792-3
Potassium Cyanide; Feratox
Kalium cyanid [German]
Potassium cyanide K(CN)
Cyanide, Potassium
Cyanure de potassium [French]
Hydrocyanic acid, potassium salt
UN1680
RCRA waste no. P098
cyanopotassium
potassiumcyanide
potasium cyanide
Caswell No 688A
Potassium cyanide, granular
Potassium Cyanide ACS grade
KALI CYANATUM [HPUS]
POTASSIUM CYANIDE(KCN)
POTASSIUM CYANIDE [MI]
DTXCID804268
CHEMBL2228308
POTASSIUM CYANIDE [HSDB]
YUZRZFQHUCKACF-UHFFFAOYSA-N
POTASSIUM CYANIDE, (SOLID)
BDBM50486225
MFCD00011397
AKOS009159058
Potassium cyanide, technical, >=96%
Potassium cyanide [UN1680] [Poison]
BP-30182
FP138783
Potassium cyanide, ACS reagent, >=96.0%
NS00075362
P1613
Potassium cyanide, BioUltra, >=98.0% (AT)
Potassium cyanide, SAJ first grade, >=95.0%
Potassium cyanide, JIS special grade, >=98.0%
Potassium cyanide, p.a., ACS reagent, 97.0%
Q192470
Potassium cyanide, puriss. p.a., ACS reagent, reag. Ph. Eur., >=97.0%
205-792-3