Dimethylmethane
1. Introduction to dimethylmethane
English name: 2,4-Dithiapentane
CASRN：1618-26-4
Constitutional formula ：
Molecular formula: C3H18S2
Molecular weight: 108.23
Boiling point: 147℃ (lit)
Density: 1.059 g/ml (25℃)
Appearance: colorless, transparent liquid with a characteristic (fresh mustard) odor.
Use: As a spice.
2. Quality Standards
| project | metric | bear fruit | remarks |
| surface | Colorless or pale yellow liquid | Colorless liquid | |
| fineness ，% | ≥98.0 | 99.0 | GC (column temperature 80℃, vaporization 220℃, detection 250℃, injection 0.1g/1ml methanol) |
| loss on drying ，% | - | ||
| +MS ，M-1 | 106.9 | 106.9 | |
| NMR（1H, 13C） | No significant peaks | No significant peaks | 1H: 2.14(3H,CH3), 3.16(1H,CH2)； 13C: 40.10(CH2),14.30(CH3)。 |
