A procurement manager in northern Jiangsu opens a quotation sheet for a 20-hectare vegetable programme and sees four lines: a pyrethroid blend, a neonicotinoid...
READ MOREOther names: PP333, Chlorobutamol
Chemical Name: (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol
CAS number: 76738-62-0
Molecular weight: 293.79
Physical and Chemical Properties: The original drug is a white solid. Melting point: 165-166°C, vapor pressure: 0.001 mPa at 20°C. Solubility at 20°C: 26 mg/L in water, 110 in acetone, 180 in cyclohexanone, and 150 in methanol. Storage at 20°C: over 2 years.
Uses: Paclobutrazol is a chemical agent. When diluted with water and sprayed on seedlings, it inhibits dominant apical growth and promotes the growth of lateral buds (tillers). The resulting seedlings appear short, stocky, and have a well-developed root system. This facilitates cultivation and allows for delayed transplanting.
Structural formula

| Physical and chemical properties | Density | 1.2±0.1 g/cm3 |
| Boiling point | 460.9±55.0 ℃ at 760 mmHg | |
| Melting point | 165-166℃ | |
| Molecular formula | C15H20ClN3O | |
| Molecular weight | 293.792 | |
| Flash point | 232.6±31.5 ℃ | |
| Exact mass | 293.129486 | |
| PSA | 50.94 | |
| LogP | 2.99 | |
| Appearance | Greyish-white to beige solid | |
| Vapour pressure | 0.0±1.2 mmHg at 25℃ | |
| Refractive index | 1.58 | |
| Storage conditions | Store in a tightly closed container in a cool, dry place. Keep away from oxidising agents. |
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