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| Ethylene thiourea Basic information |
| Ethylene thiourea Chemical Properties |
| Melting point | 196-200 °C(lit.) | | density | 1.41~1.45 | | vapor pressure | <1 hPa (25 °C) | | refractive index | 1.5500 (estimate) | | Fp | 252 °C | | storage temp. | Store below +30°C. | | solubility | 8g/l | | form | Powder | | pka | 15.01±0.20(Predicted) | | color | White | | Water Solubility | 19 g/L (20 ºC) | | Merck | 14,3803 | | BRN | 106275 | | Boiling point | 240°C (1010 hPa) | | InChIKey | PDQAZBWRQCGBEV-UHFFFAOYSA-N | | LogP | -0.67 at 20℃ | | CAS DataBase Reference | 96-45-7(CAS DataBase Reference) | | NIST Chemistry Reference | 2-Imidazolidinethione(96-45-7) | | IARC | 3 (Vol. Sup 7, 79) 2001 | | EPA Substance Registry System | Ethylene thiourea (96-45-7) |
| Ethylene thiourea Usage And Synthesis |
| Description | Ethylenethiourea, a thiourea derivative, is a rubber
chemical. It has caused contact dermatitis mainly in
rubber workers.
| | Chemical Properties | Ethylene thiourea is a white to light green, needle-like crystalline solid with a faint amine odor. It is very soluble in hot water;slightly soluble in cold water, methanol, ethanol, ethylene glycol, pyridine, acetic acid, and naphtha; and insoluble in acetone, ether, chloroform, and benzene.When heated to decomposition, ethylene thiourea emits toxic fumes of nitrogen oxides (NOx) and sulfur oxides (SOx).
Ethylene thiourea is available in the United States as crystals, as a powder, as an 80% dispersion of the powder in oil, or encapsulated in a matrix of compatible elastomers.
| | Uses | Accelerator in the curing of polychloroprene
(neoprene) and polyacrylate
rubber; intermediate in the manufacture of
antioxidants, insecticides, fungicides, dyes,
pharmaceuticals, and synthetic resins | | Uses | elastomer accelerator;chlorinated polyethylene (CPE) rubber vulcanizing accelerator agent.
Ethylene thiourea is used primarily as an accelerator for vulcanizing polychloroprene (Neoprene®) and polyacrylate rubbers. Neoprene rubbers are used almost exclusively in industrial applications，e.g.. for mechanical and automotive products, in wire and cable production, in construction，and in adhesives. Polyacrylate rubbers are used in products such as seals, o-rings, and gaskets for automotive and aircraft applications. Ethylene thiourea is used in the manufacture of ethylene-bisdithiocarbamate pesticides, such as Maneb®, Mancozeb®, Metiram®,and Zineb®.Ethylene thiourea is also used in electroplating baths, as an intermediate in antioxidant production, in dyes， pharmaceuticals，and synthetic resins. However, there is no evidence that the compound is used commercially for any of these purposes (IARC V.7, 1974; Sax, 1987). | | Uses | 2-Imidazolidinethione is a pesticide used in production of fruits and vegetables. It is also used as a new contrast agent for MRI studies based on proton chemical exchange dependent saturation transfe
r. 2-Imidazolidinethione is also a corrosion inhibitor due to the adsorption of the mol. species. | | General Description | White to pale green crystals or an off-white solid. Odorless when pure, but technical product may have an amine odor. | | Air & Water Reactions | Slightly soluble in water. | | Reactivity Profile | Ethlenethiourea may be sensitive to prolonged exposure to light. Incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. May react with acids to liberate hydrogen sulfide. | | Hazard | Questionable carcinogen. | | Health Hazard | Ethylene thiourea (ETU) is an
antithyroid substance and animal carcinogen. | | Fire Hazard | Ethylene thiourea is combustible. | | Flammability and Explosibility | Nonflammable | | Contact allergens | Ethylene thiourea, a thiourea derivative, is a rubber chemical. It caused contact dermatitis mainly in rubber workers. | | Potential Exposure | Ethylene thiourea is used extensively
as an accelerator in the curing of polychloroprene
(Neoprene) and other elastomers; as a vulcanizing accelerator in rubber processing; in electroplating baths. In addition, exposure to ethylene thiourea also results from the
very widely used ethylene bisdithiocarbamate fungicides.
Ethylene thiourea may be present as a contaminant in the
ethylene bisdithiocarbamate fungicides and can also be
formed when food containing the fungicides is cooked | | Carcinogenicity | Ethylene thiourea is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals. | | Shipping | UN2811 Toxic solids, organic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical
Name Required | | Purification Methods | Crystallise it from EtOH or amyl alcohol. [Beilstein 24 III/IV 22.] | | Incompatibilities | Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides, acid anhydrides, and
acrolein | | Waste Disposal | Incineration in a furnace
equipped with afterburner and scrubber. |
| Ethylene thiourea Preparation Products And Raw materials |
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