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2,5-DITHIOBIUREA

N,N'-Bisthiocarbamyl Hydrazine; Bis(thiourea); 1,2-Hydrazine-o-dicarbothioamide; 1,2-Hydrazine carbothioamide; 1,2-Hydrazinedicarbothioamide; 2,5-dithiourea; Dithiobiurea; Dithiocarbamoyl hydrazine; Bisthiocarbamyl hydrazine;

CAS NO:

142-46-1

  • Türü                :
  • Formülü          : C2H6N4S2
  • EINECS NO.  : 205-537-6
  • Mol Agırlığı    : 150.22
  • H.S. CODE     :
  • Zehililik          :
  • Türevleri        :
  • Kütlesi           :
  • Ekleyen          : Kimyahane Editr

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

off-white crystalline powder

MELTING POINT 212 - 216 C
BOILING POINT

Decomposes

SPECIFIC GRAVITY

 

SOLUBILITY IN WATER

Negligible

pH  
VAPOR DENSITY  
AUTOIGNITION

 

NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0
REFRACTIVE INDEX

 

FLASH POINT

 

STABILITY

Stable under ordinary conditions

GENERAL DESCRIPTION AND APPLICATIONS

Thiourea (also called Thiocarbamide or Sulfourea) is the diamide of thiocarbonic acid that resembles urea but contains sulfur instead of oxygen. 'Thio'  is a chemical prefix indicates the replacement of an oxygen in an acid radical by sulfur with a negative valence of 2; meaning 'Sulfur' derived from the Greek theion. In fact, thiourea occurs as the mixture of two tautomers: S=C(NH2)2 ( Thiourea) + HS=CNHNH2 (Isothiourea), accordingly, provides three functional groups (mino, imino, and thiol). Thiourea is a lustrous white crystalline compound; estimated melting point is 170-180 C; soluble in water and in polar organic solvents; insoluble in non-polar solvents. The exact melting point and boiling point are not available since rearrangement to ammonium thiocyanate (NH4SCN) occurs at about 135 C and decomposition occurs. It can be prepared by heating ammonium thiocyanate, or by the addition of hydrogen sulfide to cyanamide. The latter is the more common method. Thiourea is used directly in ore filtering, metal refinery and cleaning, isomerization catalyst (conversion of maleic to fumaric acid) and as an additive in fertilizers (to inhibit the nitrification process), drilling auxiliaries, light-sensitive photocopy paper and explosives.  It is used as a fixing agent in photography, as a liquefying agent in animal hide glue, as an insecticide, as a textile-treating agent, and as an intermediate to produce other compounds. Thiourea and its derivatives are versatile intermediates for the synthesis of modified thermosetting resins, thiourea dioxide, dyes, flame retardants, vulcanization accelerators, plant protection agents, pesticides, amino resins, peptizing agents, fungicides, hair preparations, dry cleaning chemicals, corrosion inhibitors and thiazole drugs (e.g., antiseptic, thyrotherapeutic, narcotic, and tuberculostatic agents). Dithiobiurea possesses a wide dipole moment and thus is involved in the forming wide metal chelated complexes as the radioactiv-compound which used in radiopharmaceutical imaging, inhibiting enzyme function, kidney function study and to treat toxic metal poisoning. It is used in co-crystals development used in the field of nonlinear optics to generate new coherent wavelengths.

ASSAY

98.0% min

MELTING POINT 212 - 216 C


SALES SPECIFICATION  

COLOR, APHA

 
APPEARANCE

off-white crystalline powder

CHEMICAL PURITY  
OPTICAL PUIRTY  
TRANSPORTATION  
PACKING

 

HAZARD CLASS  
UN NO.

 

OTHER INFORMATION

European Hazard Symbols: T, Risk Phrases: 45-23/24/25-43, Safety Phrases: 53-28A-37-45

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