Acetone thiosemicarbazone
Names | |
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IUPAC name
(Propan-2-ylideneamino)thiourea | |
Other names
Acetone thiosemicarbazide; Dimethyl ketone thiosemicarbazone; Thiosemicarbazone acetone; NSC 711; 2-(1-Methylethylidene)hydrazinecarbothioamide | |
Identifiers | |
1752-30-3 | |
3D model (Jmol) | Interactive image Interactive image |
Abbreviations | ATSC |
ChEMBL | ChEMBL500557 |
ChemSpider | 2050659 |
ECHA InfoCard | 100.015.580 |
EC Number | 217-137-9 |
PubChem | 2770166 |
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Properties | |
C4H9N3S | |
Molar mass | 131.20 g·mol−1 |
Appearance | White crystals |
Melting point | 172 to 175 °C (342 to 347 °F; 445 to 448 K) |
Hazards | |
Main hazards | Toxic |
Safety data sheet | MSDS |
EU classification (DSD) |
T+ |
R-phrases | R21 R25 R26 |
S-phrases | S22 S28 S36/37/39 S45 |
NFPA 704 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
verify (what is ?) | |
Infobox references | |
Acetone thiosemicarbazone is a chemical compound with the molecular formula C4H9N3S. It is used in the plastics industry in the manufacture of polyvinyl chloride (PVC) to terminate the polymerization process.[2][3]
It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.[4]
References
- ↑ Acetone thiosemicarbazone, chemicalland21.com
- ↑ US patent 3637632, Traynor, Lee, "Agents for shortstopping free radical polymerization of vinylidene monomers", issued 1972-Jan-25
- ↑ Acetone thiosemicarbazone (ATSC) Archived February 27, 2012, at the Wayback Machine., 88chem.com
- ↑ "40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities" (PDF) (July 1, 2008 ed.). Government Printing Office. Retrieved October 29, 2011.
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