Isocyanic acid

Also known as: Isocyanic acid, HNCO, Hydrogen isocyanate, imino-ketone, isocianic acid, isocyansaeure, oxidoazanediidocarbon, HN=C=O

Isocyanic acid (CAS 75-13-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula CHNO and a molecular weight of 43.02470 g/mol. Key properties include a melting point of -86ºC, a boiling point of 23.5ºC and a density of 1.04g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 75-13-8
Jingsj CID: J-1136458-2
Molecular Formula: CHNO
Molecular Weight: 43.02470 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	-86ºC
Boiling Point	23.5ºC
Density	1.04g/cm3
Exact Mass	43.00580
PSA	40.92000
LogP	0.00070
Refractive Index	1.395

Customs & Trade Information

HS Code	2933699090
Summary	2933699090 other compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Isocyanic acid?

The CAS number of Isocyanic acid is 75-13-8.

What are the molecular formula and molecular weight of Isocyanic acid?

Isocyanic acid has molecular formula CHNO and molecular weight 43.02470 g/mol.

What are the upstream and downstream products of Isocyanic acid?

For Isocyanic acid, Upstream Products: Ethanol, Ethyl carbamate, Methanol; Downstream Products: Oxamic acid, urazole, Sulfamic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Isocyanic acid (CAS 75-13-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1136458-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.