125938

Dibutyl phosphite

96%

• Synonym(s): Butyl phosphite, Butyl phosphonate, Di-n-butyl hydrogen phosphite, Di-n-butyl phosphite, Dibutoxyphosphine oxide, Dibutyl hydrogen phosphite, Dibutyl phosphonate
• Linear Formula: (CH₃CH₂CH₂CH₂O)₂P(O)H
• CAS Number: 1809-19-4
• Molecular Weight: 194.21
• Beilstein/REAXYS Number: 1099706
• MDL number: MFCD00066633
• UNSPSC Code: 12352100
• eCl@ss: 39110212
• PubChem Substance ID: 24847687
• NACRES: NA.22

Properties

• vapor pressure: <0.1 mmHg ( 20 °C)
• assay: 96%
• impurities: ≤1% butanol
• refractive index: n20/D 1.423 (lit.)
• bp: 118-119 °C/11 mmHg (lit.)
• solubility: H₂O: soluble 7.3 g/L at 25 °C
• density: 0.995 g/mL at 25 °C (lit.)
• SMILES string: CCCCO[PH](=O)OCCCC
• InChI: 1S/C8H19O3P/c1-3-5-7-10-12(9)11-8-6-4-2/h12H,3-8H2,1-2H3
• InChI key: NFJPGAKRJKLOJK-UHFFFAOYSA-N

Description

General description

Dibutyl phosphite undergoes addition reaction with Schiff bases to yield 1,4-bis[N-methyl(dibutoxyphosphonyl)-1-(2-furyl)]diaminobenzene and 4,4′-bis[N-methyl(dibutoxyphosponyl)-1-phenyl]benzidine. It is antiwear and extreme-pressure additive in industrial gear oils.

Application

Dibutyl phosphite was used as anti-wear agent in bio-based lubricating oil.

Other Notes

Contains tributyl phosphate

Safety Information

• pictograms: GHS08,GHS07
• signalword: Warning
• hcodes: H315,H319,H351,H412
• pcodes: P202 - P264 - P273 - P302 + P352 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Aquatic Chronic 3 - Carc. 2 - Eye Irrit. 2 - Skin Irrit. 2
• Storage Class: 10 - Combustible liquids
• wgk_germany: WGK 3
• flash_point_f: 244.4 °F - closed cup
• flash_point_c: 118 °C - closed cup