Tributyl borate
Tributyl borate (CAS 688-74-4), with the linear formula [CH3(CH2)3O]3B and a molecular weight of 230.15 g/mol, is an organoborate compound. It functions as a versatile reagent in organic synthesis. Commonly employed as a building block and protecting group in various chemical transformations, it is a valuable component in research and industrial chemical processes.
- IUPAC
- Boric acid tributylester,Tributoxyborane
- Synonyms
- Boric acid tributylesterTributoxyborane
![Tributyl borate ([CH3(CH2)3O]3B) — chemical structure, CAS 688-74-4; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F688-74-4.png&w=3840&q=75)
Organic Synthesis Reagent
Tributyl borate serves as a key reagent in the synthesis of complex organic molecules. Its utility spans various reactions, including the formation of carbon-carbon bonds and the preparation of other organoboron compounds.
Boron Source
It acts as a source of boron in the preparation of boronic acids and esters, which are crucial intermediates in medicinal chemistry and materials science.
Protecting Group Chemistry
The compound can be utilized for the temporary protection of diols, facilitating selective reactions elsewhere in a molecule during multi-step syntheses.
| Molecular weight | 230.15 |
|---|---|
| Linear formula | [CH3(CH2)3O]3B |
| Assay | ≥99.0% (T) |
| Boiling point | 114-115 °C/12 mmHg(lit.)230-235 °C(lit.) |
| Density | 0.853 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.409(lit.)n20/D 1.409 |
| Vapour density | 7.95 (vs air) |
| Melting point | −70 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 93 °C / 199.4 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26-36/37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Tributyl borate primarily used for?
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Tributyl borate is primarily used as a reagent in organic synthesis, for introducing boron into molecules, and as a protecting group for diols.
What is the CAS number and formula for Tributyl borate?
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The CAS number for Tributyl borate is 688-74-4, and its linear formula is [CH3(CH2)3O]3B.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tributyl borate with an assay of ≥99.0% (T). This is a technical grade, and TSS does not represent it as USP, BP, or EP grade.
How should Tributyl borate be handled safely?
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Tributyl borate is classified as a Warning with hazards including skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, such as eyeshields, gloves, and a respirator, should be used. Handle in a well-ventilated area.
Is Tributyl borate a controlled substance?
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The provided data does not indicate that Tributyl borate is a controlled substance.
How is Tributyl borate packed and exported?
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Tributyl borate is packaged and exported according to relevant regulations for chemical substances. For specific requirements, please contact our sales team.
How can I request a quote or sample of Tributyl borate?
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To request a quote or a sample of Tributyl borate, please contact the Tech Serve Solutions sales department via our website or by phone.
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