Дитиокарбамат аммония

Identification

Ammonium dithiocarbamate is the ammonium salt of dithiocarbamic acid, an organic sulfur-containing compound. English name Ammonium dithiocarbamate, CAS number 513-74-6, chemical formula CH3NS2,H3N. Synonyms: carbamondithioic acid (ammonium salt), carbamic acid dithio-monoammonium salt, carbamondithioic acid monoammonium salt.

Physico-chemical characteristics

• Molecular weight: 110.2
• Exact weight: 109.997238
• EU number: 208-166-8
• UNII: VH74O7C5IH
• DSSTox ID: DTXSID3027166
• Color/shape: fresh yellow shiny ortho-rhombic crystals
• HS code: 293090909090

Substance class, purpose and mechanism of action

Belongs to the class of dithiocarbamates - compounds with the functional group -NH-C(=S)-S-, capable of firmly binding ions of heavy and non-ferrous metals due to the formation of chelate complexes through two sulfur atoms. The main application of the substance is based on this property: a reagent and intermediate product in the vulcanization of rubber (an accelerator and activator of sulfur crosslinking systems), as well as a collector and chelating reagent in the flotation enrichment of sulfide and oxide ores of non-ferrous metals, where the dithiocarbamate group transforms the surface of mineral particles into a hydrophobic state. The crystalline form and moderate molecular weight make the salt convenient for dosing in aqueous technological solutions. As a lower ammonium salt of dithiocarbamic acid, the substance is less stable during storage than sodium or potassium analogues, and is prone to gradual decomposition with the release of carbon disulfide and ammonia, therefore it is usually prepared and used immediately before use.

Scope of application

• rubber industry - component of vulcanizing systems, accelerator of sulfur cross-linking of rubber
• enrichment of non-ferrous metal ores - collector during flotation of sulfide and oxide minerals of copper, lead, zinc
• analytical and coordination chemistry - ligand for precipitation and qualitative determination of heavy metal ions
• synthesis of other dithiocarbamates - starting reagent in laboratory and preparative schemes

Storage and transportation

Store in a factory sealed container, in a cool, dry, well-ventilated area, away from heat sources and strong oxidizing agents with which dithiocarbamates can react to release hydrogen sulfide and carbon disulfide. When working with a crystalline product, use gloves and respiratory protection when dusting, avoid getting into water bodies due to the toxicity of the compound to aquatic organisms. The shelf life of the crystalline product is limited: with prolonged contact with air and moisture, gradual darkening and decomposition of the crystals is possible, so it is recommended to consume batches in the order they are received.

What is not transferred from the dump

All numerical values ​​of the dump (molecular weight, exact mass, HS code) are transferred completely; there was no specific hazard block (H/P phrases) in the original dump.