Diethyl phthalate
Also known as: DEP, Ethyl phthalate, Phthalic acid diethyl ester, 1,2-Benzenedicarboxylic acid diethyl ester, Diethyl 1,2-benzenedicarboxylate, Diethyl o-phthalate
Diethyl phthalate (CAS 84-66-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H14O4 and a molecular weight of 222.237 g/mol. Key properties include a melting point of −3 °C(lit.), a boiling point of 294.0±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 160.0±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 84-66-2
- Jingsj CID
- J-3248-4
- Molecular Formula
- C12H14O4
- Molecular Weight
- 222.237 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −3 °C(lit.) |
|---|---|
| Boiling Point | 294.0±0.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 160.0±0.0 °C |
| Exact Mass | 222.089203 |
| PSA | 52.60000 |
| LogP | 2.70 |
| Additional Property | 7.66 (vs air) |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.508 |
| Additional Property | 1 g/L (20 ºC) |
Customs & Trade Information
| HS Code | 2917349000 |
|---|---|
| Summary | 2917349000 other esters of orthophthalic acid。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 Diethyl phthalate?
The CAS number of Diethyl phthalate is 84-66-2.
What are the molecular formula and molecular weight of Diethyl phthalate?
Diethyl phthalate has molecular formula C12H14O4 and molecular weight 222.237 g/mol.
What are the upstream and downstream products of Diethyl phthalate?
For Diethyl phthalate, Upstream Products: Diethyl acetylenedicarboxylate, Crotonaldehyde, Ethanol; Downstream Products: 1,3-Indandione, 1,4-Dihydroxy-2-naphthoic acid, Ethyl benzoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diethyl phthalate (CAS 84-66-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3248-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.