1,1,3,3-Tetramethylguanidine
Chemical compound / From Wikipedia, the free encyclopedia
Tetramethylguanidine is an organic compound with the formula HNC(N(CH3)2)2. This colourless liquid is a strong base, as judged by the high pKa of it conjugate acid.[2]
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
N,N,N′,N′-Tetramethylguanidine | |
Identifiers | |
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3D model (JSmol) |
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969608 | |
ChemSpider |
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ECHA InfoCard | 100.001.185 |
EC Number |
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MeSH | 1,1,3,3-tetramethylguanidine |
PubChem CID |
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UNII | |
UN number | 2920 |
CompTox Dashboard (EPA) |
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Properties | |
C5H13N3 | |
Molar mass | 115.180 g·mol−1 |
Appearance | Colourless liquid |
Density | 918 mg mL−1 |
Melting point | −30 °C (−22 °F; 243 K) |
Boiling point | 160 to 162 °C (320 to 324 °F; 433 to 435 K) |
Miscible | |
Vapor pressure | 30 Pa (at 20 °C) |
Acidity (pKa) | 13.0±1.0[1] (pKa of conjugate acid in water) |
Refractive index (nD) |
1.469 |
Hazards | |
GHS labelling: | |
Danger | |
H226, H302, H314 | |
P280, P305+P351+P338, P310 | |
Flash point | 60 °C (140 °F; 333 K) |
Explosive limits | 1–7.5% |
Related compounds | |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It was originally prepared from tetramethylthiourea via S-methylation and amination, but alternative methods start from cyanogen iodide.[3]