Tributyl borate

Description

Tributyl borate is identified by CAS 688-74-4, molecular formula C12H27BO3 and molecular weight 230.21 g/mol. UNII X3UQ8D0UED; InChIKey LGQXXHMEBUOXRP-UHFFFAOYSA-N. Boiling Point: 446 to 448 °F at 760 mmHg (NTP, 1992); Boiling Point: 234 °C; Boiling Point: 230 °C @760 [mm Hg].

Identification

CAS Registry Number	688-74-4
PubChem CID	12712
Molecular formula	C12H27BO3
Molecular weight	230.21 g/mol
IUPAC name	tributyl borate
InChIKey	LGQXXHMEBUOXRP-UHFFFAOYSA-N
UNII (FDA)	X3UQ8D0UED

Computed Descriptors

Molecular Weight	230.15
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	12
Exact Mass	230.2053249
Monoisotopic Mass	230.2053249
Topological Polar Surface Area	27.7
Heavy Atom Count	16
Formal Charge	0
Complexity	110

Physical & Chemical Properties

Boiling Point	446 to 448 °F at 760 mmHg (NTP, 1992)
Boiling Point	234 °C
Boiling Point	230 °C @760 [mm Hg]
Density	0.8567 g/cu cm at 20 °C
Density	0.847 @ 20°C
Vapor Density	7.94 (Air = 1)
Vapor Pressure	0.52 [mmHg]
Vapor Pressure	0.526 mm Hg at 25 °C
Viscosity	1.601 centipoise at 25 °C

Physical description & handling notes

• Tributyl borate is a water-white liquid. (NTP, 1992)
• Liquid
• Colorless liquid; [HSDB]
• Water-white liquid
• Colorless, mobile, moisture sensitive liquid
• Like n-butanol

GHS Hazard Classification

Reported hazard statements	H302 (92.2%), H312 (70.9%), H315 (100%), H318 (16.5%), H319 (83.5%), H335 (99.8%)

Documented Uses

• Used in welding fluxes, flame retardants for textiles, and curing systems for metal coatings; [HSDB]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• Welding fluxes, intermediate in preparation of borohydrides, flame retardant for textiles (with boric acid).
• Provides a fast curing system suitable for metal coating.
• Reaction of n-butyl alcohol with boron trichloride
• From butyl alcohol and boric acid.

Synonyms

TRIBUTYL BORATE; 688-74-4; Tri-n-butyl borate; Tributoxyborane; n-Butyl borate; Tributoxyboron; Butyl borate; Tri-n-butoxyborane; Boron tributoxide; Borester 2; Tris(butoxy)borane; Borane, tributoxy-; Tributyl orthoborate; Butyl borate, tri-; Boric acid, tributyl ester; Tributoxyborine

Frequently Asked Questions

What are the CAS number and molecular formula of Tributyl borate?

CAS 688-74-4; molecular formula C12H27BO3; molecular weight 230.21 g/mol.

What other names is Tributyl borate known by?

TRIBUTYL BORATE, 688-74-4, Tri-n-butyl borate, Tributoxyborane, n-Butyl borate, Tributoxyboron.

Is Tributyl borate classified as hazardous?

Hazard statements reported: H302, H312, H315, H318, H319.

What are the key physical properties of Tributyl borate?

Boiling Point: 446 to 448 °F at 760 mmHg (NTP, 1992); Boiling Point: 234 °C; Boiling Point: 230 °C @760 [mm Hg]; Density: 0.8567 g/cu cm at 20 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.