Pinacyanol iodide

Also known as: 1,1'-Diethyl-2,2'-carbocyanine iodide, 1-Ethyl-2-[3-(1-ethyl-2(1H)-quinolinylidene)-1-propenyl]quinolinium iodide, Quinolinium, 1-ethyl-2-[(1E,3Z)-3-(1-ethyl-2(1H)-quinolinylidene)-1-propen-1-yl]-, iodide (1:1), CI No 808

Pinacyanol iodide (CAS 605-91-4) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C25H25IN2 and a molecular weight of 480.384 g/mol. Key properties include a melting point of 295 °C (dec.)(lit.), a boiling point of 527.7ºC at 760 mmHg, a density of 1.151g/cm3 and a flash point of 240.2ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H311 — Toxic in contact with skin and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 605-91-4
Jingsj CID: J-19485-4
Molecular Formula: C₂₅H₂₅IN₂
Molecular Weight: 480.384 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	295 °C (dec.)(lit.)
Boiling Point	527.7ºC at 760 mmHg
Density	1.151g/cm3
Flash Point	240.2ºC
Exact Mass	480.106232
PSA	8.81000
LogP	1.90080
Refractive Index	1.685

GHS Safety & Compliance

Acute ToxicitySignal word: Danger

H301 — Toxic if swallowed
H311 — Toxic in contact with skin
H331 — Toxic if inhaled

Activity & Biological Data

Additional Information	[1]. Galestian Pour A, et al. Anharmonic vibrational effects in linear and two-dimensional electronic spectra. Phys Chem Chem Phys. 2017 Sep 20;19(36):24752-24760.

Frequently Asked Questions

What is the CAS number of Pinacyanol iodide?

The CAS number of Pinacyanol iodide is 605-91-4.

What are the molecular formula and molecular weight of Pinacyanol iodide?

Pinacyanol iodide has molecular formula C25H25IN2 and molecular weight 480.384 g/mol.

Is Pinacyanol iodide hazardous?

Pinacyanol iodide has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H311 — Toxic in contact with skin; H331 — Toxic if inhaled.

What are the upstream and downstream products of Pinacyanol iodide?

For Pinacyanol iodide, Upstream Products: Formaldehyde, 1-Ethyl-2-methylquinolinium iodide, Triethyl orthoformate.

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. "Pinacyanol iodide (CAS 605-91-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19485-4 (accessed 2026-11-09).

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