Pinacolborane

Also known as: 4,4,5,5-Tetramethyl-1,3,2-dioxaborolane, HBPin, PinBH, MFCD00674030, Pinacolborane (4,4,5,5-Tetramethyl-1,3,2-dioxaborolane), PinB-TE, Pinacolatoborane

Pinacolborane (CAS 25015-63-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C6H12BO2 and a molecular weight of 127.977 g/mol. Key properties include a boiling point of 109.9±7.0 °C at 760 mmHg, a density of 0.882 g/mL at 25 °C(lit.) and a flash point of 20.2±18.2 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H261 and H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.: 25015-63-8
Jingsj CID: J-31170-6
Molecular Formula: C₆H₁₂BO₂
Molecular Weight: 127.977 g/mol
Category: Alcohols
Last updated: 11/2/2026

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Physicochemical Properties

Boiling Point	109.9±7.0 °C at 760 mmHg
Density	0.882 g/mL at 25 °C(lit.)
Flash Point	20.2±18.2 °C
Exact Mass	128.100861
PSA	18.46000
LogP	0.85690
Vapor Pressure	28.6±0.2 mmHg at 25°C
Refractive Index	n20/D 1.396(lit.)

GHS Safety & Compliance

Flammable / Irritant / Health HazardSignal word: Danger

H225 — Highly flammable liquid and vapour
H261
H302 — Harmful if swallowed
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation
H351 — Suspected of causing cancer

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 Pinacolborane?

The CAS number of Pinacolborane is 25015-63-8.

What are the molecular formula and molecular weight of Pinacolborane?

Pinacolborane has molecular formula C6H12BO2 and molecular weight 127.977 g/mol.

Is Pinacolborane hazardous?

Pinacolborane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H261; H302 — Harmful if swallowed.

What are the upstream and downstream products of Pinacolborane?

For Pinacolborane, Upstream Products: Ethyl tert-butyl ether, Bis(pinacolato)diboron, 2,3-Dimethyl-2,3-butanediol; Downstream Products: 2-(3-Chlorothiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-(4-chloro-3,5-dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-(4,5-dihydrofuran-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 11/2/2026

How to cite: Jingsj. "Pinacolborane (CAS 25015-63-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31170-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.