N,N'-DIMETHYLTHIOUREA

PRODUCT IDENTIFICATION
CAS NO. 534-13-4

n,n'-DIMETHYLTHIOUREA
EINECS NO. 208-588-2
FORMULA (CH3NH)2CS
MOL WT. 104.17

H.S. CODE

 2930.90

TOXICITY

  
SYNONYMS 1,3-Dimethylthiourea; Dimethylthiourea;
Dimethyl-2-thiourea; N,N'-dimethylthiocarbamide; N,N'-dimethylthioharnstoff (Dutch); N,N'-Diméthylthiourée (French); N,N'-Dimetiltiourea (Spanish);
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE off-white crystalline powder

MELTING POINT

 58 - 64 C
BOILING POINT 155 C at 1pHa
SPECIFIC GRAVITY  

SOLUBILITY IN WATER

 slightly soluble
pH 6.5
VAPOR DENSITY  
AUTOIGNITION

 

REFRACTIVE INDEX

 

NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0
FLASH POINT

200 C

STABILITY Stable under ordinary conditions. Hygroscopic.
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 fct, 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. N,N'-Dimethylthiourea is used in manufacturing vulcanization acceleratorand corrosion inhibitors for metal treatments.
SALES SPECIFICATION

APPEARANCE

 off-white crystalline powder
ASSAY

98.0% min

MELTING POINT 58 - 64 C
TRANSPORTATION
PACKING 25kgs in Bag
HAZARD CLASS 6.1 (Packing Group: II)
UN NO. 2811
OTHER INFORMATION
Hazard Symbols: , Risk Phrases: , Safety Phrases: 28A-36/37/45-37-45