Molekula
3,3'-Diaminobenzidine
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
3,3'-Diaminobenzidine (DAB) is a tetraamine compound widely used as a chromogenic substrate in immunohistochemistry and histochemistry for detecting peroxidase activity, producing a brown precipitate. It is also employed in chemical synthesis, particularly for dyes and polymers. CAS 91-95-2, molecular formula (NH₂)₂C₆H₃C₆H₃(NH₂)₂, molecular weight 214.27 g/mol. Store at 2–8°C. Hazardous—handle with care (signal word: Danger). Molekula supplies 3,3'-Diaminobenzidine 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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1 g — £88.00 per pack ex VAT · £105.60 inc. VAT
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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 | Off-white to pale yellow powder |
| Water | ≤0.50% |
| Purity (HPLC) | ≥98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 100 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 176 °C |
Source: PubChem CID 7071 (ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 16119261 |
| CAS Number | 91-95-2 |
| IUPAC Name | 4-(3,4-diaminophenyl)benzene-1,2-diamine |
| EC Number | 202-110-6 |
| Molecular Formula | (NH2)2C6H3C6H3(NH2)2 |
| Molecular Weight | 214.27 |
| Exact Mass | 214.1218 |
| SMILES | C1=CC(=C(C=C1C2=CC(=C(C=C2)N)N)N)N |
| InChIKey | HSTOKWSFWGCZMH-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H14N4/c13-9-3-1-7(5-11(9)15)8-2-4-10(14)12(16)6-8/h1-6H,13-16H2 |
| PubChem CID | 7071 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2921.59.8090 |
| Tariff Code | 2921599090 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H319 Causes serious eye irritation
- H341 Suspected of causing genetic defects
- H350 May cause cancer
Precautionary statements
- P201 Obtain special instructions before use
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
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.
Synonyms
- [1,1'-Biphenyl]-3,3',4,4'-tetraamine
- [1,1'-Biphenyl]-3,3',4,4'-tetramine
- 3,3',4,4'-Biphenyltetramine
- 3,3',4,4'-Diphenyltetramine
- 3,3',4,4'-Tetraaminobiphenyl
- 3,3',4,4'-Tetraaminodiphenyl
- 3,3',4,4'-Tetraminobiphenyl
- 4-(3,4-diaminophenyl)benzene-1,2-diamine
- Biphenyl-3,3',4,4'-tetrayltetraamine
- Diaminobenzidine, 3,3
Frequently asked questions
What is 3,3'-Diaminobenzidine (DAB) commonly used for?
3,3'-Diaminobenzidine is primarily used as a chromogenic substrate in immunohistochemistry (IHC) for detecting antigens in tissue sections, as well as in electron microscopy and some polymer applications.
What is the chemical formula and molecular weight of 3,3'-Diaminobenzidine?
The chemical formula is **(NH₂)₂C₆H₃C₆H₃(NH₂)₂**, and the molecular weight is **214.27 g/mol**.
How should 3,3'-Diaminobenzidine be stored?
Store at **2–8°C** in a tightly sealed container, protected from light and moisture, as it is light-sensitive and can degrade over time.
What grades or purities of 3,3'-Diaminobenzidine does Molekula supply?
Molekula supplies **analytical and reagent-grade 3,3'-Diaminobenzidine**, suitable for laboratory and research applications requiring high purity.
Can Molekula supply 3,3'-Diaminobenzidine in bulk quantities?
Yes, Molekula can provide **bulk quantities** of 3,3'-Diaminobenzidine upon request, subject to availability and compliance with safety regulations.
What documentation comes with an order of 3,3'-Diaminobenzidine?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
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.