Methyl isocyanatoformate
异氰酸基甲酸甲酯
Also known as: Methyl isocyanatoformate, Methoxycarbonyl isocyanate, Carbonisocyanatidic acid methyl ester, Carbomethoxyisocyanate, Methyl carbonisocyanatidoate, Carbonylcarbamic acid methyl ester, methyl N-(oxomethylidene)carbamate, methyl N-carbonylcarbamate, n-(methoxycarbonyl)isocyanate, Carbonyl-carbamidsaeure-methylester, MFCD00037079, methylisocyanatoformate
Methyl isocyanatoformate (CAS 5843-42-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H3NO3 and a molecular weight of 101.06100 g/mol. It is also known as Methoxycarbonyl isocyanate, Carbonisocyanatidic acid methyl ester and Carbomethoxyisocyanate. Key properties include a boiling point of 97ºC(lit.), a density of 1.251 g/mL at 25ºC(lit.) and a flash point of 87 °F. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H302 — Harmful if swallowed and H312 — Harmful in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5843-42-5
- Jingsj CID
- J-855301-2
- Molecular Formula
- C3H3NO3
- Chinese Name
- 异氰酸基甲酸甲酯
- Molecular Weight
- 101.06100 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 97ºC(lit.) |
|---|---|
| Density | 1.251 g/mL at 25ºC(lit.) |
| Flash Point | 87 °F |
| Exact Mass | 101.01100 |
| PSA | 55.73000 |
| LogP | 0.08860 |
| Refractive Index | n20/D 1.413(lit.) |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H332 — Harmful if inhaled
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Komuro K, et al. Efficient Preparation of Cyclic α-Alkylidene β-Oxo Imides by Using a Flow Microreactor System. Synlett, 2018, 29(15): 1989-1994. |
|---|
Customs & Trade Information
| HS Code | 2929109000 |
|---|---|
| Summary | 2929109000. other isocyanates. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyl isocyanatoformate?
The CAS number of Methyl isocyanatoformate is 5843-42-5.
What are the molecular formula and molecular weight of Methyl isocyanatoformate?
Methyl isocyanatoformate has molecular formula C3H3NO3 and molecular weight 101.06100 g/mol.
Is Methyl isocyanatoformate hazardous?
Methyl isocyanatoformate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H302 — Harmful if swallowed; H312 — Harmful in contact with skin.
What are the upstream and downstream products of Methyl isocyanatoformate?
For Methyl isocyanatoformate, Upstream Products: Oxalyl chloride, Methyl carbamate, Trimethylsilyl isocyanate; Downstream Products: Methyl N-carbamoylcarbamate, tert-Butyl Methyl Iminodicarboxylate.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl isocyanatoformate (CAS 5843-42-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-855301-2 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.