Bis(pinacolato)diboron
Also known as: 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi-1,3,2-dioxaborolane, Diboron pinacol ester, B2pin2, Pin2B2, Bis(pinacolate)diboron, 4,4,4',4',5,5,5',5'-Octamethyl-2,2'-bi(1,3,2-dioxaborolane)
Bis(pinacolato)diboron (CAS 73183-34-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H24B2O4 and a molecular weight of 253.94 g/mol. Key properties include a melting point of 137-140 °C(lit.), a boiling point of 222.6±7.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 88.4±18.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 73183-34-3
- Jingsj CID
- J-42706-5
- Molecular Formula
- C12H24B2O4
- Molecular Weight
- 253.94 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 137-140 °C(lit.) |
|---|---|
| Boiling Point | 222.6±7.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 88.4±18.2 °C |
| Exact Mass | 254.186066 |
| PSA | 36.92000 |
| LogP | 2.24920 |
| Vapor Pressure | 0.2±0.4 mmHg at 25°C |
| Refractive Index | 1.432 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Bis(pinacolato)diboron?
The CAS number of Bis(pinacolato)diboron is 73183-34-3.
What are the molecular formula and molecular weight of Bis(pinacolato)diboron?
Bis(pinacolato)diboron has molecular formula C12H24B2O4 and molecular weight 253.94 g/mol.
What are the upstream and downstream products of Bis(pinacolato)diboron?
For Bis(pinacolato)diboron, Upstream Products: 2,3-Dimethyl-2,3-butanediol, Tetrahydroxydiboron, Tetrakis(dimethylamino)diboron; Downstream Products: 3-Methyl-5-phenylpyridine, 2-Methoxy-3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]isothiazole.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Bis(pinacolato)diboron (CAS 73183-34-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42706-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.