- Shanghai Nianxing Industrial Co., Ltd
- China
- Product Name: 3H-Pyrazol-3-one,2,4-dihydro-
- Price: Check
- Purity: 98.0%
- Stocking Period: 10 Day
- Contact: Yang
- Email: sales@echemcloud.com
- Shanghai Jizhi Biochemical Technology Co., Ltd
- China
- Product Name: 3H-Pyrazol-3-one,2,4-dihydro-
- Price: ￥1168.0/1g ￥488.0/250mg
- Purity: 98.0%
- Stocking Period: 2 Day
- Contact: Liu jia
- Email: 2130147988@qq.com
- Dayang Chem (Hangzhou) Co., Ltd.
- China
- Product Name: 3H-Pyrazol-3-one,2,4-dihydro-
- Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
- Purity: 98.0%
- Stocking Period: Inquiry
- Contact: Ms Wang
- Email: enquiry@dycnchem.com
137-44-0
137-44-0 structure
- Name: 3H-Pyrazol-3-one,2,4-dihydro-
- Chemical Name: 1H-Pyrazol-5(4H)-one
- CAS Number: 137-44-0
- Molecular Formula: C3H4N2O
- Molecular Weight: 84.07670
- Create Date: 2018-08-08 15:14:55
- Modify Date: 2025-08-29 14:09:14
| Name | 1H-Pyrazol-5(4H)-one |
|---|---|
| Synonyms | 1,4-dihydropyrazol-5-one |
| Density | 1.44g/cm3 |
|---|---|
| Melting Point | 162 °C |
| Molecular Formula | C3H4N2O |
| Molecular Weight | 84.07670 |
| Exact Mass | 84.03240 |
| PSA | 41.46000 |
| Index of Refraction | 1.63 |
| Hazard Codes | Xi |
|---|---|
| HS Code | 2933199090 |
|
~%
137-44-0 |
| Literature: Bioorganic and Medicinal Chemistry Letters, , vol. 20, # 5 p. 1661 - 1664 |
| Precursor 1 | |
|---|---|
| DownStream 1 | |
| HS Code | 2933199090 |
|---|---|
| Summary | 2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |