Black cyanide
Black cyanide
CAS:
Molecular Formula: CN-
Black cyanide - Names and Identifiers
Black cyanide - Physico-chemical Properties
| Molecular Formula | CN- |
| Molar Mass | 26.0174 |
| Physical and Chemical Properties | Grayish-black flaky, powder or block product. The relative density of 1.8~1.9. It is a mixture of various solids after melting, mainly containing calcium cyanide, sodium chloride and calcium oxide and other substances, in which cyanide is dissolved in water. Pure white crystals. Since the decomposition started above 350 °c, the melting point was determined to be around 640 °c by extrapolation. Cyanide is predominantly present in the cyanide melt as calcium cyanide. The calcium cyanide solution can be obtained by leaching the cyanide melt with water. With acid to produce hydrogen cyanide. In the air, cyanide melt absorption of carbon dioxide and water vapor, decomposition to produce hydrogen cyanide, resulting in a significant decline in product quality. Highly toxic! |
Black cyanide - Introduction
Cyanide melt, also known as cyanide melt, is a high concentration solution of cyanide, usually a solution of sodium cyanide or potassium cyanide. The following is an introduction to the properties, uses, production methods, and safety information of cyanide frits:
nature:
1. Cyanide frits are colorless or slightly yellow, with a spicy ammonia flavor.
2. Has high solubility and can dissolve in water or organic solvents.
3. Applying it to metal will quickly corrode and corrode.
Usage:
1. Cyanide blocks are mainly used in metal electroplating and electroplating processes, and can be used as components of electroplating solutions.
2. It can also be used to prepare some compounds in organic synthesis, such as cyanide or cyanate salts.
Method:
Usually, cyanide frits are obtained by adding sodium cyanide or potassium cyanide to water, stirring, and heating to dissolve. The preparation process requires strict safety measures and equipment.
Security information:
1. Cyanide frits are highly toxic substances that must be handled with care and follow safe operating procedures.
2. It poses serious harm to human health and the environment, especially through inhalation and contact.
3. Personal protective equipment such as protective glasses, gloves, and protective clothing must be worn for operation.
4. When using cyanide melting blocks, it is necessary to do so in a well ventilated area and strictly control the concentration and amount of solution used.
5. Cyanide blocks must be stored in sealed containers, away from heat and ignition sources, and separated from acidic substances and oxidants.
Last Update：2024-07-11 12:34:45
