Dibutyl phosphite
Also known as: Dibutyl phosphonate, Dibutyl hydrogen phosphite, Phosphonic acid dibutyl ester, DI-N-BUTYL PHOSPHITE, DI-N-BUTYL HYDROGEN PHOSPHITE, Dibutoxyphosphine oxide, Dibutylfosfit, Phosphorous acid dibutyl ester, Syn-O-Ad P-316, Butyl phosphite, Dibutyl hydrogen phosphonate
Dibutyl phosphite (CAS 1809-19-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H18O3P and a molecular weight of 194.208 g/mol. Key properties include a boiling point of 279.0±9.0 °C at 760 mmHg, a density of 0.995 g/mL at 25 °C(lit.) and a flash point of 122.6±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H312 — Harmful in contact with skin, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 1809-19-4
- Jingsj CID
- J-14479-6
- Molecular Formula
- C8H18O3P
- Molecular Weight
- 194.208 g/mol
- Category
- Organic Acids
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 279.0±9.0 °C at 760 mmHg |
|---|---|
| Density | 0.995 g/mL at 25 °C(lit.) |
| Flash Point | 122.6±18.7 °C |
| Exact Mass | 194.107178 |
| PSA | 59.00000 |
| LogP | 4.78 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | n20/D 1.423(lit.) |
| Additional Property | slightly soluble |
GHS Safety & Compliance
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H318 — Causes serious eye damage
- H335 — May cause respiratory irritation
- H351 — Suspected of causing cancer
Customs & Trade Information
| HS Code | 2920909090 |
|---|---|
| Summary | 2920909090 esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Dibutyl phosphite?
The CAS number of Dibutyl phosphite is 1809-19-4.
What are the molecular formula and molecular weight of Dibutyl phosphite?
Dibutyl phosphite has molecular formula C8H18O3P and molecular weight 194.208 g/mol.
Is Dibutyl phosphite hazardous?
Dibutyl phosphite has GHS signal word Danger and hazard statements H312 — Harmful in contact with skin; H315 — Causes skin irritation; H318 — Causes serious eye damage.
What are the upstream and downstream products of Dibutyl phosphite?
For Dibutyl phosphite, Upstream Products: 1-Butanol, Tributyl phosphite, Diethyl phosphite; Downstream Products: 1-Iodobutane, Butyl hydrogen phosphonate, Ethephon.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Dibutyl phosphite (CAS 1809-19-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14479-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.