Benzyl isocyanate
Also known as: Isocyanatomethylbenzene, (Isocyanatomethyl)benzene, Isocyanic acid benzyl ester, 1-(Isocyanatomethyl)benzene, Phenylmethyl isocyanate, Benzene, (isocyanatomethyl)-, Benzene, isocyanatomethyl-, MFCD00009701
Benzyl isocyanate (CAS 3173-56-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7NO and a molecular weight of 133.147 g/mol. Key properties include a boiling point of 198.5±19.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 45.0±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H317 — May cause an allergic skin reaction. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3173-56-6
- Jingsj CID
- J-48056-8
- Molecular Formula
- C8H7NO
- Molecular Weight
- 133.147 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 198.5±19.0 °C at 760 mmHg |
|---|---|
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 45.0±0.0 °C |
| Exact Mass | 133.052765 |
| PSA | 29.43000 |
| LogP | 2.61 |
| Vapor Pressure | 0.4±0.4 mmHg at 25°C |
| Refractive Index | 1.518 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H317 — May cause an allergic skin reaction
- H319 — Causes serious eye irritation
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 29291090 |
|---|
Frequently Asked Questions
What is the CAS number of Benzyl isocyanate?
The CAS number of Benzyl isocyanate is 3173-56-6.
What are the molecular formula and molecular weight of Benzyl isocyanate?
Benzyl isocyanate has molecular formula C8H7NO and molecular weight 133.147 g/mol.
Is Benzyl isocyanate hazardous?
Benzyl isocyanate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H317 — May cause an allergic skin reaction.
What are the upstream and downstream products of Benzyl isocyanate?
For Benzyl isocyanate, Upstream Products: Carbon dioxide, benzyl azide, Bis(trichloromethyl) carbonate; Downstream Products: BENZYLUREA, N-Benzyl-N-phenylaniline, (S)-2-Benzylamino-1-phenylethanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Benzyl isocyanate (CAS 3173-56-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48056-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.