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
CAS Number	1752-30-3 Y
3D model (JSmol)	Interactive image Interactive image
Abbreviations	ATSC
ChEMBL	ChEMBL500557 Y
ChemSpider	2050659 Y
ECHA InfoCard	100.015.580
EC Number	217-137-9
PubChem CID	2770166
UNII	C3U604L47F Y
CompTox Dashboard (EPA)	DTXSID6044480
InChI InChI=1S/C4H9N3S/c1-3(2)6-7-4(5)8/h1-2H3,(H3,5,7,8) Y Key: FQUDPIIGGVBZEQ-UHFFFAOYSA-N Y InChI=1/C4H9N3S/c1-3(2)6-7-4(5)8/h1-2H3,(H3,5,7,8) Key: FQUDPIIGGVBZEQ-UHFFFAOYAR
SMILES CC(=NNC(=S)N)C S=C(N)N/N=C(\C)C
Properties
Chemical formula	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
Occupational safety and health (OHS/OSH):
Main hazards	Toxic
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H312, H330
Precautionary statements	P260, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P312, P320, P321, P322, P330, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)	4
Safety data sheet (SDS)	MSDS
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

Toxicity

Acetone thiosemicarbazone 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]

Symptoms of exposure

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