tert-Butyl isocyanate
Also known as: 1,1-dimethylethyl isocyanate, 2-isocyanato-2-methylpropane, Isocyanic acid tert-butyl ester, t-butyl isocyanate, tert-Butyl isocyanate, stab., TERT-BUTYL ISOCYANATE 98%, left-Butyl isocyanate, t-C4H9NCO, Tertbuty Isocyanate
tert-Butyl isocyanate (CAS 1609-86-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H9NO and a molecular weight of 99.13110 g/mol. Key properties include a melting point of <-25ºC, a boiling point of 85-86 °C(lit.), a density of 0.868 g/mL at 25 °C(lit.) and a flash point of -4.4 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H302 — Harmful if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 1609-86-5
- Jingsj CID
- J-14449-0
- Molecular Formula
- C5H9NO
- Molecular Weight
- 99.13110 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | <-25ºC |
|---|---|
| Boiling Point | 85-86 °C(lit.) |
| Density | 0.868 g/mL at 25 °C(lit.) |
| Flash Point | -4.4 °C |
| Exact Mass | 99.06840 |
| PSA | 29.43000 |
| LogP | 1.12070 |
| Vapor Pressure | 69.2mmHg at 25°C |
| Refractive Index | n20/D 1.386(lit.) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
- H317 — May cause an allergic skin reaction
- H330 — Fatal if inhaled
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
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 tert-Butyl isocyanate?
The CAS number of tert-Butyl isocyanate is 1609-86-5.
What are the molecular formula and molecular weight of tert-Butyl isocyanate?
tert-Butyl isocyanate has molecular formula C5H9NO and molecular weight 99.13110 g/mol.
Is tert-Butyl isocyanate hazardous?
tert-Butyl isocyanate has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of tert-Butyl isocyanate?
For tert-Butyl isocyanate, Upstream Products: 2-(tert-butylamino)-2-oxoacetic acid, Carbon dioxide, tert-Butylamine; Downstream Products: Trimethylacetonitrile, N-tert-butyl-2-methylbenzamide, tert-Butylamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "tert-Butyl isocyanate (CAS 1609-86-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14449-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.