Molekula
3,3'-Diaminobenzidine tetrahydrochloride
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 tetrahydrochloride is a highly sensitive chemical reagent primarily used in biochemical assays, including DNA sequencing, protein detection, and histochemical staining due to its strong chromogenic properties. Upon peroxidase-catalyzed oxidation with hydrogen peroxide, it forms an insoluble brown polymeric precipitate, making it essential in analytical and diagnostic applications. This compound has a CAS number of 7411-49-6, with the molecular formula (NH2)2C6H3C6H3(NH2)2 · 4HCl and a molecular weight of 360.11 g/mol (anhydrous). It must be stored at -15 to -20°C and is classified with the signal word "Danger" due to its hazardous nature. Molekula supplies 3,3'-Diaminobenzidine tetrahydrochloride 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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5 g — £77.70 per pack ex VAT · £93.24 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 / light pink / greyish-brown crystalline powder. |
| Water | <15% |
| Assay | 98.0% min |
| Water insoluble matter | <0.01% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
For research use only. Not for human use.
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Solid |
| Melting Point | 178-180 °C |
Source: PubChem CID 23892 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 27393749 |
| CAS Number | 7411-49-6 |
| IUPAC Name | 4-(3,4-diaminophenyl)benzene-1,2-diamine;tetrahydrochloride |
| EC Number | 231-018-9 |
| Molecular Formula | (NH2)2C6H3C6H3(NH2)2 · 4HCl |
| Molecular Weight | 360.11 (Anhydrous) |
| Exact Mass | 360.0256 |
| SMILES | C1=CC(=C(C=C1C2=CC(=C(C=C2)N)N)N)N.Cl.Cl.Cl.Cl |
| InChIKey | KJDSORYAHBAGPP-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H14N4.4ClH/c13-9-3-1-7(5-11(9)15)8-2-4-10(14)12(16)6-8;;;;/h1-6H,13-16H2;4*1H |
| PubChem CID | 23892 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2921598090 |
| Tariff Code | 2921599090 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H340 May cause genetic defects
- H351 Suspected of causing cancer
- H360FD May damage fertility. May damage the unborn child.
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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, 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
- (1,1'-Biphenyl)-3,3',4,4'-tetramine, hydrochloride (1:4)
- [1,1'-Biphenyl]-3,3',4,4'-tetramine, tetrahydrochloride
- 3,3'-Diaminobenzidine hydrochloride
- 3,3'-Diammoniumbenzidinium tetrachloride
- 3,3',4,4'-Biphenyltetramine, tetrahydrochloride
- 3,3',4,4'-Tetraaminobiphenyl tetrahydrochloride
- 3,3'Diaminobenzidine4HCl
- 3,4,3',4'-TETRAAMINOBIPHENYL TETRAHYDROCHLORIDE
- 4-(3,4-diaminophenyl)benzene-1,2-diamine;tetrahydrochloride
- DAB
Frequently asked questions
What is 3,3'-Diaminobenzidine tetrahydrochloride primarily used for?
It is commonly used as a chromogenic substrate in histochemistry and immunohistochemistry for detecting peroxidase activity, as well as in research applications like DNA sequencing and protein detection.
What is the chemical formula and molecular weight of this compound?
The formula is (NH₂)₂C₆H₃C₆H₃(NH₂)₂ · 4HCl, and the molecular weight is 360.11 g/mol (anhydrous).
What safety classification does this product have, and how should it be handled?
The product has a Signal Word: Danger due to its hazardous nature. It requires careful handling, proper PPE, and adherence to safety protocols—consult the SDS for full details.
What grades or purities of 3,3'-Diaminobenzidine tetrahydrochloride does Molekula supply?
Molekula supplies this compound in analytical and research-grade purity, optimized for laboratory and diagnostic applications.
Can Molekula supply this product in bulk quantities?
Yes, we can accommodate bulk orders—please contact our sales team for pricing, lead times, and availability based on your specific requirements.
What documentation comes with an order of this product?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS/SDS), and a Product Specification Sheet detailing purity, storage, and handling instructions.
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.