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Dibutyl phosphite

Dibutyl phosphite structure

CAS No:
1809-19-4
Formula:
C8H19O3P
Chemical Name:
Dibutyl phosphite
Synonyms:
Phosphonic acid,dibutyl ester;Butyl phosphite ((C4H9O)2(HO)P);Butyl phosphonate ((BuO)2HPO);Dibutyl phosphite;Dibutyl phosphonate;Di-n-butyl hydrogen phosphite;Phosphorous acid,dibutyl ester;Dibutyl hydrogen phosphite;Butyl alcohol,hydrogen phosphite;Dibutoxyphosphine oxide;Butyl phosphonate ((C4H9O)2HPO);DBP 1;Di-n-butyl phosphite;NSC 2668;Duraphos DBHP;T 304;1936453-03-0;2014388-38-4
Categories:
Organic Chemistry > Inorganic Acid Esters

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Description

clear colorless to slightly yellow liquid

Dibutyl phosphite Basic Attributes

Molecular Weight：

194.21

Exact Mass：

194.21

EC Number：

217-316-1

HScode：

29209090

Characteristics

PSA：

35.5

XLogP3：

1.81 (est)

Appearance：

Clear Liquid

Density：

0.9860 g/cm³ @ Temp: 25 °C

Melting Point：

70.5 °C

Boiling Point：

95 °C @ Press: 1 Torr

Flash Point：

250 °F

Refractive Index：

n 20/D 1.423(lit.)

Water Solubility：

H2O: soluble 7.3g/L at 25°C

Vapor Pressure：

<0.1 mm Hg ( 20 °C)

Vapor Density：

6.7 (Air= 1)

Toxicity：

Oral-Rat LD50: 3200 mg/kg

Flammability characteristics：

Combustible in case of open flame, high temperature and strong oxidant; decomposes toxic phosphorus oxide gas when heated by acid

Safety Information

Packing level：

I; II; III

Transport codes：

1760

wgk germany：

hazard class code：

21-37/38-40-41-36/37/38

safety instructions：

26-36/37/39

RTECS Number：

HS6475000

Marks：

Storage features：

Completely packed, lightly placed; storeroom ventilated, away from open flame, high temperature, and stored separately from oxidants and acids

Precautionary statement(s)：

P302 + P352 + P312-P304 + P340 + P312-P305 + P351 + P338 + P310

Hazard Statements：

H312-H315-H318-H335-H351

Toxicity

Toxicity class：

moderately toxic

Dibutyl phosphite Use and Manufacturing

Methods of Manufacturing

Derived from the reaction of butanol and phosphorus trichloride. The Hooker Chemical Company of the United States reacts butanol with phosphorus trichloride at a pressure below atmospheric pressure. When the liquid alcohol enters the reaction zone, it evaporates immediately, absorbing the heat generated by the exothermic reaction, and making the reaction proceed smoothly. The yield of dibutyl phosphite can reach 92% in terms of PCI3, and it will increase with the increase of alcohol consumption.

Uses

Used as anti-wear agent for lubricating oil. It is compounded with sulfurized isobutylene and other additives, and can be formulated into automobile hyperbolic gear oil. The general dosage is 0.5-1.0%. Because the product is acidic and easily decomposed in water, it should be compounded with an appropriate amount of alkaline rust inhibitor. In addition, the product can also be used as flame retardants, gasoline additives, antioxidants, solvents and organic synthesis intermediates.

Material

Phosphonic acid

1-Butanol

Diethyl phosphite

Phosphonic acid, dimethyl ester

Downstream Products

Ethephon

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CAS No.: 1809-19-4

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Dibutyl phosphite CAS1809-19-4

CAS No.: 1809-19-4

Grade: Industrial Grade

Content: 99%

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