1,3,5-Triphenylformazan

Also known as: Triphenylformazan, 1,3,5-Triphenylformazane, Triphenylformazane, DTTC Formazan, Tetrazole Red Formazan, Tetrazolium Red Formazan, TTC Formazan, (E)-1-Phenyl-2-[(Z)-phenyl(phenylhydrazono)methyl]diazene, N'-(Phenylamino)-N-phenyliminobenzenecarboximidamide, Phenyl(2-phenylhydrazono)(phenylazo)methane, Diazene, phenyl(phenyl(phenylhydrazono)methyl)-, MFCD00020647, EINECS 208-509-1, NSC 2931, NSC 34836

1,3,5-Triphenylformazan (CAS 531-52-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C19H16N4 and a molecular weight of 300.357 g/mol. Key properties include a boiling point of 422.3±28.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 209.2±24.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H400 — Very toxic to aquatic life. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 531-52-2
Jingsj CID: J-1323968-4
Molecular Formula: C₁₉H₁₆N₄
Molecular Weight: 300.357 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	422.3±28.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	209.2±24.0 °C
Exact Mass	300.137512
PSA	49.11000
LogP	5.07
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.617
Additional Property	dioxane: 50 mg/mL, clear

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning

H302 — Harmful if swallowed
H400 — Very toxic to aquatic life

Customs & Trade Information

HS Code	2928000090
Summary	2928000090 other organic derivatives of hydrazine or of hydroxylamine VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1,3,5-Triphenylformazan?

The CAS number of 1,3,5-Triphenylformazan is 531-52-2.

What are the molecular formula and molecular weight of 1,3,5-Triphenylformazan?

1,3,5-Triphenylformazan has molecular formula C19H16N4 and molecular weight 300.357 g/mol.

Is 1,3,5-Triphenylformazan hazardous?

1,3,5-Triphenylformazan has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H400 — Very toxic to aquatic life.

What are the upstream and downstream products of 1,3,5-Triphenylformazan?

For 1,3,5-Triphenylformazan, Upstream Products: Benzaldehyde, Phenylhydrazine, N-Phenylbenzenecarbohydrazonoyl chloride; Downstream Products: 2,3,5-Triphenyltetrazolium chloride, 2,3,5-Triphenyl-2H-tetrazol-3-ium iodide, 2,3,5-Triphenyltetrazolium bromide.

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. "1,3,5-Triphenylformazan (CAS 531-52-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1323968-4 (accessed 2026-11-09).

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