Molekula
Oil Red O
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Oil Red O is a bright red azo dye widely used in biological staining, lipid detection, and microscopy for visualizing neutral triglycerides and lipids in tissues. It is also applied in industrial dyeing and as a colorant in plastics and cosmetics. CAS 1320-06-5, molecular formula C26H24N4O, molecular weight 408.49 g/mol. Stored at ambient conditions. Non-hazardous (no signal word). Molekula supplies Oil Red O from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £28.00 per pack ex VAT · £33.60 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Red powder |
| Melting Point | ≥ 230 °C |
| Ash | ≤ 1% |
| Moisture | ≤ 1% |
| Fineness | ≤ 5% |
| Colour differential value | ≤ 1 |
| Tint Strength | 100+3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 17425205 |
| CAS Number | 1320-06-5 |
| IUPAC Name | 1-[[4-[(2,5-dimethylphenyl)diazenyl]-2,5-dimethylphenyl]diazenyl]naphthalen-2-ol |
| EC Number | 238-209-6 |
| Molecular Formula | C26H24N4O |
| Molecular Weight | 408.49 |
| Exact Mass | 408.195 |
| 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 | 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 |
| PubChem CID | 2724054 |
| REACH Code | Y113 |
| HTS Code | 3212.90.00.50 |
| Tariff Code | 3212900000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1-((4-((2,5-Dimethylphenyl)diazenyl)-2,5-dimethylphenyl)diazenyl)naphthalen-2-ol
- 1-([4-(Xylylazo)xylyl]azo)-2-naphthol
- 1-(2,5-Dimethyl-4-(2,5-dimethylphenylazo)phenylazo)-2-naphthol
- C.I. 26125
- HJAYEODIXUYVIC-LTFAAIOASA-N
- MolMap_000039
- NPGIHFRTRXVWOY-UHFFFAOYSA-N
- Solvent Red 27
- starbld0000918
- Sudan Red 5B
Frequently asked questions
What is Oil Red O commonly used for?
Oil Red O is primarily used as a dye in biological and histological staining, particularly for lipids in tissue samples, and as a colorant in plastics and cosmetics.
What is the chemical formula and molecular weight of Oil Red O?
The chemical formula is **C26H24N4O** with a molecular weight of **408.49 g/mol**.
How should Oil Red O be stored?
Store Oil Red O at **ambient temperature** in a tightly sealed container, away from moisture and direct sunlight.
What grades of Oil Red O does Molekula supply?
Molekula supplies **analytical grade** Oil Red O for research and industrial applications.
Can Molekula supply Oil Red O in bulk quantities?
Yes, Molekula can provide Oil Red O in bulk, with quantities tailored to your specific needs—please contact us for pricing and availability.
What documentation comes with an Oil Red O order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.