1-naphthyl isothiocyanate

Also known as: α-Naphthyl isothiocyanate, 1-Isothiocyanatonaphthalene, ANIT, ANI, Kesscocide, Naphthyl mustard oil, 1-Isothiocyanatenaphthalene, Naphthalene, 1-isothiocyanato-

1-naphthyl isothiocyanate (CAS 551-06-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H7NS and a molecular weight of 185.245 g/mol. Key properties include a melting point of 55.5-57 °C(lit.), a boiling point of 339.3±11.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 167.2±27.1 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 551-06-4
Jingsj CID: J-5617-7
Molecular Formula: C₁₁H₇NS
Molecular Weight: 185.245 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	55.5-57 °C(lit.)
Boiling Point	339.3±11.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	167.2±27.1 °C
Exact Mass	185.029922
PSA	44.45000
LogP	4.47
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.623
Additional Property	insoluble

GHS Safety & Compliance

Acute Toxicity / Health HazardSignal word: Danger

H301 — Toxic if swallowed
H312 — Harmful in contact with skin
H332 — Harmful if inhaled
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H334 — May cause allergy or asthma symptoms if inhaled
H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 1-naphthyl isothiocyanate?

The CAS number of 1-naphthyl isothiocyanate is 551-06-4.

What are the molecular formula and molecular weight of 1-naphthyl isothiocyanate?

1-naphthyl isothiocyanate has molecular formula C11H7NS and molecular weight 185.245 g/mol.

Is 1-naphthyl isothiocyanate hazardous?

1-naphthyl isothiocyanate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H312 — Harmful in contact with skin; H332 — Harmful if inhaled.

What are the upstream and downstream products of 1-naphthyl isothiocyanate?

For 1-naphthyl isothiocyanate, Upstream Products: Thiophosgene, 1-Naphthylamine, Naphtox; Downstream Products: 1-(naphthalen-1-yl)-1H-tetrazole-5-thiol, 4-(1-Naphthyl)-3-thiosemicarbazide, Naphtox.

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. "1-naphthyl isothiocyanate (CAS 551-06-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5617-7 (accessed 2026-11-09).

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