Acetone thiosemicarbazone

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]

Acetone thiosemicarbazone[1]
Names
Preferred IUPAC name
2-(Propan-2-ylidene)hydrazine-1-carbothioamide
Other names
(Propan-2-ylideneamino)thiourea
Acetone thiosemicarbazide
Dimethyl ketone thiosemicarbazone
Thiosemicarbazone acetone
NSC 711
2-(1-Methylethylidene)hydrazinecarbothioamide
Identifiers
3D model (JSmol)
Abbreviations ATSC
ChEMBL
ChemSpider
ECHA InfoCard 100.015.580
EC Number
  • 217-137-9
UNII
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
GHS pictograms
GHS Signal word Danger
H300, H312, H330
P260, P264, P270, P271, P280, P284, P301+310, P302+352, P304+340, P310, P312, P320, P321, P322, P330, P363, P403+233, P405, P501
NFPA 704 (fire diamond)
Flammability (red): no hazard codeHealth code 4: Very short exposure could cause death or major residual injury. E.g. VX gasReactivity (yellow): no hazard codeSpecial hazards (white): no code
4
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

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]

Toxicity

Symptoms of exposure

Symptoms of acute exposure to acetone thiosemicarbazide may include nausea, vomiting, eye and skin irritation, excessive salivation, pulmonary edema, excitability, hyperglycemia, and seizures.[5]

References

  1. Acetone thiosemicarbazone, chemicalland21.com
  2. US patent 3637632, Traynor, Lee, "Agents for shortstopping free radical polymerization of vinylidene monomers", issued 1972-Jan-25
  3. Acetone thiosemicarbazone (ATSC) Archived February 27, 2012, at the Wayback Machine, 88chem.com
  4. "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. Archived from the original (PDF) on February 25, 2012. Retrieved October 29, 2011. Cite journal requires |journal= (help)
  5. https://cameochemicals.noaa.gov/chemical/10000
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