Diphosgene
Also known as: Trichloromethyl chloroformate, Trichloromethyl carbonochloridate, Carbonochloridic acid, trichloromethyl ester, Trichloromethylchloroformate, Perchloromethylformate, Difosgen, Diphosgen, Disphosgene
Diphosgene (CAS 503-38-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2Cl4O2 and a molecular weight of 197.832 g/mol. Key properties include a melting point of -57 °C, a boiling point of 128.0±0.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 32.2±24.9 °C. It is classified under GHS with signal word Danger and hazard statements H300, H330 — Fatal if inhaled and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 503-38-8
- Jingsj CID
- J-14455-9
- Molecular Formula
- C2Cl4O2
- Molecular Weight
- 197.832 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -57 °C |
|---|---|
| Boiling Point | 128.0±0.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 32.2±24.9 °C |
| Exact Mass | 195.865234 |
| PSA | 26.30000 |
| LogP | 2.85 |
| Vapor Pressure | 10.8±0.2 mmHg at 25°C |
| Refractive Index | 1.499 |
| Additional Property | may decompose |
GHS Safety & Compliance
- H300
- H330 — Fatal if inhaled
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2915900090 |
|---|---|
| Summary | 2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Diphosgene?
The CAS number of Diphosgene is 503-38-8.
What are the molecular formula and molecular weight of Diphosgene?
Diphosgene has molecular formula C2Cl4O2 and molecular weight 197.832 g/mol.
Is Diphosgene hazardous?
Diphosgene has GHS signal word Danger and hazard statements H300; H330 — Fatal if inhaled; H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of Diphosgene?
For Diphosgene, Upstream Products: methyl formate, Chloromethyl chloroformate, Bis(trichloromethyl) carbonate; Downstream Products: 2-Nitrophenyl isocyanate, 4-Chloro-3-(trifluoromethyl)phenyl isocyanate, Heptyl Isocyanate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diphosgene (CAS 503-38-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14455-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.