Acetone thiosemicarbazone

Acetone thiosemicarbazone^[1]

Names
IUPAC name (Propan-2-ylideneamino)thiourea
Other names Acetone thiosemicarbazide; Dimethyl ketone thiosemicarbazone; Thiosemicarbazone acetone; NSC 711; 2-(1-Methylethylidene)hydrazinecarbothioamide
Identifiers
CAS Number	1752-30-3 N
3D model (JSmol)	Interactive image Interactive image
Abbreviations	ATSC
ChemSpider	2050659 Y
ECHA InfoCard	100.015.580
EC Number	217-137-9
PubChem CID	2770166
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
Main hazards	Toxic
Safety data sheet	MSDS
EU classification (DSD) (outdated)	T+
R-phrases (outdated)	R21 R25 R26
S-phrases (outdated)	S22 S28 S36/37/39 S45
NFPA 704	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

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