Solvent Red 27

Also known as: Oil Red O, C.I. 26125, Sudan Red 5B, Ceres Red 5B, Fat Red 5B, 1-(2,5-Dimethyl-4-(2,5-dimethylphenylazo)phenylazo)-2-naphthol, 1-((4-((2,5-Dimethylphenyl)diazenyl)-2,5-dimethylphenyl)diazenyl)naphthalen-2-ol

Solvent Red 27 (CAS 1320-06-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C26H24N4O and a molecular weight of 408.5 g/mol. Key properties include a melting point of 120ºC, a boiling point of 638.8±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 439.7±20.8 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H336 — May cause drowsiness or dizziness. It is listed by 1 supplier, from 0.56 to 1.84 CNY. Record last updated Aug 21, 2026.

CAS No.: 1320-06-5
Jingsj CID: J-1110640-3
Molecular Formula: C₂₆H₂₄N₄O
Molecular Weight: 408.5 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Supplier	Purity / Pack	Base Price	Unit Price	Origin
Maikuo Made to Order	75% 500g	¥280.00	$0.08 /gBest ¥0.56/g CNY	CN China MOQ 500g	View Product
Maikuo Made to Order	75% 250g	¥180.00	$0.11 /g ¥0.72/g CNY	CN China MOQ 250g	View Product
Maikuo Made to Order	0.5% 500ml	¥920.00	$0.28 /ml ¥1.84/ml CNY	CN China MOQ 500ml	View Product

Physicochemical Properties

Melting Point	120ºC
Boiling Point	638.8±55.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	439.7±20.8 °C
Exact Mass	408.195007
PSA	69.67000
LogP	7.58
Vapor Pressure	0.0±2.0 mmHg at 25°C
Refractive Index	1.631
SMILES	CC1=CC(=C(C=C1)C)N=NC2=C(C=C(C(=C2)C)N=NC3=C(C=CC4=CC=CC=C43)O)C
InChIKey	NPGIHFRTRXVWOY-UHFFFAOYSA-N
InChI	1S/C26H24N4O/c1-16-9-10-17(2)22(13-16)27-28-23-14-19(4)24(15-18(23)3)29-30-26-21-8-6-5-7-20(21)11-12-25(26)31/h5-15,31H,1-4H3

GHS Safety & Compliance

Flammable / IrritantSignal word: Danger

H225 — Highly flammable liquid and vapour
H319 — Causes serious eye irritation
H336 — May cause drowsiness or dizziness

Activity & Biological Data

Additional Information	[1]. Mehlem A, et al. Imaging of neutral lipids by oil red O for analyzing the metabolic status in health and disease. Nat Protoc. 2013 Jun;8(6):1149-54.

Customs & Trade Information

HS Code	32041900

Frequently Asked Questions

What is the CAS number of Solvent Red 27?

The CAS number of Solvent Red 27 is 1320-06-5.

What are the molecular formula and molecular weight of Solvent Red 27?

Solvent Red 27 has molecular formula C26H24N4O and molecular weight 408.5 g/mol.

Which suppliers offer Solvent Red 27?

1 supplier(s) listed; reference unit price ¥0.56–1.84 /g.

Is Solvent Red 27 hazardous?

Solvent Red 27 has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H336 — May cause drowsiness or dizziness.

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. "Solvent Red 27 (CAS 1320-06-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1110640-3 (accessed 2026-11-06).

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