4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran

Also known as: DCM, Propanedinitrile, [2-[2-[4-(dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]-, 2-Methyl-4-(dicyanomethylene)-6-[4-(dimethylamino)styryl]-4H-pyran, 4-(Dicyanomethylene)-6-[4-(dimethylamino)styryl]-2-methyl-4H-pyran, Malononitrile, (2-(p-(dimethylamino)styryl)-6-methyl-4H-pyran-4-ylidene)-, [2-[2-[4-(Dimethylamino)phenyl]ethenyl]-6-methyl-4H-pyran-4-ylidene]propanedinitrile, 4-(Dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran, DCM (merocyanine), MFCD00051341

4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (CAS 51325-91-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C19H17N3O and a molecular weight of 303.358 g/mol. Key properties include a melting point of 215-220ºC (lit.), a boiling point of 446.9±45.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 224.1±28.7 °C. It is classified under GHS with signal word Danger and hazard statements H228, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51325-91-8
Jingsj CID: J-43851-1
Molecular Formula: C₁₉H₁₇N₃O
Molecular Weight: 303.358 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	215-220ºC (lit.)
Boiling Point	446.9±45.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	224.1±28.7 °C
Exact Mass	303.137177
PSA	60.05000
LogP	1.69
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.689

GHS Safety & Compliance

Flammable / IrritantSignal word: Danger

H228
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H332 — Harmful if inhaled
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran?

The CAS number of 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran is 51325-91-8.

What are the molecular formula and molecular weight of 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran?

4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran has molecular formula C19H17N3O and molecular weight 303.358 g/mol.

Is 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran hazardous?

4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran has GHS signal word Danger and hazard statements H228; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran?

For 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran, Upstream Products: (2,6-Dimethyl-4H-pyran-4-ylidene)malononitrile, 4-Dimethylaminobenzaldehyde.

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. "4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (CAS 51325-91-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-43851-1 (accessed 2026-11-06).

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