Ethyl cyanoformate
Also known as: Cyanoformic acid ethyl ester, Ethyl carbonocyanidate, Carbonocyanidic acid ethyl ester, Formic acid, cyano-, ethyl ester
Ethyl cyanoformate (CAS 623-49-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H5NO2 and a molecular weight of 99.088 g/mol. Key properties include a boiling point of 115.5±9.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 24.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H301 — Toxic if swallowed and H311 — Toxic in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 623-49-4
- Jingsj CID
- J-18670-9
- Molecular Formula
- C4H5NO2
- Molecular Weight
- 99.088 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 115.5±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 24.4±0.0 °C |
| Exact Mass | 99.032028 |
| PSA | 50.09000 |
| LogP | 0.27 |
| Vapor Pressure | 19.0±0.2 mmHg at 25°C |
| Refractive Index | 1.402 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H301 — Toxic if swallowed
- H311 — Toxic in contact with skin
- H314 — Causes severe skin burns and eye damage
- H331 — Toxic if inhaled
Customs & Trade Information
| HS Code | 2926909090 |
|---|---|
| Summary | HS:2926909090 other nitrile-function compounds VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Ethyl cyanoformate?
The CAS number of Ethyl cyanoformate is 623-49-4.
What are the molecular formula and molecular weight of Ethyl cyanoformate?
Ethyl cyanoformate has molecular formula C4H5NO2 and molecular weight 99.088 g/mol.
Is Ethyl cyanoformate hazardous?
Ethyl cyanoformate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H301 — Toxic if swallowed; H311 — Toxic in contact with skin.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Ethyl cyanoformate (CAS 623-49-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18670-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.