Molekula
Disperse Orange 3
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Disperse Orange 3 is a synthetic organic dye used primarily in the textile industry for coloring polyester and other synthetic fibers. It is a disperse dye with the chemical formula O2NC6H4N=NC6H4NH2, a molecular weight of 242.23 g/mol, and a CAS number of 730-40-5. It is stable at ambient storage conditions and carries a warning signal word due to potential hazards.
Molekula supplies Disperse Orange 3 in 5 g and 25 g packs, from £61.20 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 8 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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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5 g — £51.00 per pack ex VAT · £61.20 inc. VAT
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25 g — £119.00 per pack ex VAT · £142.80 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 |
| Strength | ≥98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90030781 |
| CAS Number | 730-40-5 |
| IUPAC Name | 4-[(4-nitrophenyl)diazenyl]aniline |
| EC Number | 211-984-8 |
| Molecular Formula | C12H10N4O2 |
| Molecular Weight | 242.23 |
| Exact Mass | 242.0804 |
| SMILES | C1=CC(=CC=C1N)N=NC2=CC=C(C=C2)[N+](=O)[O-] |
| InChIKey | UNBOSJFEZZJZLR-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H10N4O2/c13-9-1-3-10(4-2-9)14-15-11-5-7-12(8-6-11)16(17)18/h1-8H,13H2 |
| PubChem CID | 12896 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 3204.11.5000 |
| Tariff Code | 3204110090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P272 Contaminated work clothing should not be allowed out of the workplace
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+P352 IF ON SKIN: Wash with soap and water
- P304+P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do, continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 1-(4'-aminophenylazo)-4-nitrobenzene
- 4-(4-Nitrophenylazo)aniline
- 4-[(4-nitrophenyl)azo]benzenamine
- 4-[(4-nitrophenyl)diazenyl]aniline
- 4-Amino-4'-nitroazobenzene
- Benzenamine, 4-(2-(4-nitrophenyl)diazenyl)-
- Benzenamine, 4-[(4-nitrophenyl)azo]-
- Benzeneamine, 4-((nitrophenyl)azo)-
- C.I. Disperse Orange 3
- DO3
Frequently asked questions
What is Disperse Orange 3 used for?
Disperse Orange 3 is primarily used as a dye in the textile industry, especially for coloring polyester and other synthetic fibers.
What is the chemical formula and molecular weight of Disperse Orange 3?
The formula is O2NC6H4N=NC6H4NH2 with a molecular weight of 242.23 g/mol.
How should Disperse Orange 3 be stored?
It should be stored at ambient temperature, away from moisture and direct sunlight.
What grade of Disperse Orange 3 is available?
Molekula supplies Disperse Orange 3 as a red powder with a strength of at least 98%.
Can Molekula supply Disperse Orange 3 in bulk?
Yes, Molekula can supply Disperse Orange 3 in bulk quantities upon request.
What documentation comes with a Disperse Orange 3 order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Where can I buy Disperse Orange 3?
Directly from Molekula, which lists Disperse Orange 3 in 5 g and 25 g packs from £61.20 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.