Tetramethylsuccinonitrile[1] | |
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2,2,3,3-Tetramethylbutanedinitrile[citation needed] |
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Other names
Tetramethyl butanedinitrile[citation needed] |
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Identifiers | |
Abbreviations | TMSN[citation needed] |
CAS number | 3333-52-6 |
PubChem | 18745 |
ChemSpider | 17700 |
UNII | 116XMU2GHK |
MeSH | tetramethylsuccinonitrile |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | C8H12N2 |
Molar mass | 136.19 g mol−1 |
Appearance | Colourless crystals |
Density | 1.07 g mL−1 |
Melting point |
169 °C, 442.2 K, 336 °F |
Thermochemistry | |
Std enthalpy of formation ΔfH |
13.6–16.2 kJ mol−1 |
Std enthalpy of combustion ΔcH |
−4.8767–−4.8793 MJ mol−1 |
Related compounds | |
Related alkanenitriles | |
Related compounds | DBNPA |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Tetramethylsuccinonitrile or TMSN is an organic compound with the formula (C(CH3)2CN)2. Classified as a di[nitrile]], it is a colorless and odorless solid. TMSN is the by-product from the use of some radical initiators used in polymer manufacture.[2]
TMSN is derived from 2,2'-azobis-isobutyronitrile:
- (NC(CH3)2CN)2 → (C(CH3)2CN)2 + N2
AIBN is a common radical initiator in the manufacture of polyvinyl chloride polymers.
Safety considerations
Because PVC is pervasive and can contain TMSN, the safety aspects of this dinitrile has generated interest.[3]
Symptoms of large or short exposure to this substance include convulsions, dizziness, headache, nausea, vomiting or even unconsciousness, hence affects central nervous system.
References
- ^ "TETRAMETHYL SUCCINONITRILE". International Chemistry Safety Cards. Vermont Safety Information Resources Inc. Retrieved 14 June 2012.
- ^ Polymeric Materials Encyclopedia, Joseph C. Salamone, 1996, CRC Press, ISBN 0-8493-2470-X
- ^ Ishiwata, H; Inoue T, Yoshihira K. (July 1987). "Tetramethylsuccinonitrile in polyvinyl chloride products for food and its release into food-simulating solvents". Z Lebensm Unters Forsch. 185 (1): 39–42. PMID 3617937