Molekula
o-Tolidine dihydrochloride
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
o-Tolidine dihydrochloride is a chemical used in analytical chemistry and as a reagent in dye and pharmaceutical synthesis. It appears as a crystalline powder and is highly sensitive to light and air. CAS: 612-82-8, Molecular Formula: C14H16N2•2HCl, Molecular Weight: 285.22 g/mol, Storage: Ambient, Signal Word: Danger.
Molekula supplies o-Tolidine dihydrochloride at ≥ 95.0% purity in 5 g packs, from £37.08 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 6 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 — £30.90 per pack ex VAT · £37.08 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 | White to light brown |
| Melting Point | c.a. 300°C |
| Identification | Conforms to reference |
| Solubility | Clear colourless solution, 1% aq. |
| Assay | ≥ 95.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 150 °C |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 30152913 |
| CAS Number | 612-82-8 |
| IUPAC Name | 4-(4-amino-3-methylphenyl)-2-methylaniline;dihydrochloride |
| EC Number | 210-322-5 |
| Molecular Formula | C14H16N2•2HCl |
| Molecular Weight | 285.22 |
| Exact Mass | 284.0847 |
| SMILES | CC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)C)N.Cl.Cl |
| InChIKey | LUKPNZHXJRJBAN-UHFFFAOYSA-N |
| InChI | InChI=1S/C14H16N2.2ClH/c1-9-7-11(3-5-13(9)15)12-4-6-14(16)10(2)8-12;;/h3-8H,15-16H2,1-2H3;2*1H |
| PubChem CID | 108938 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29215130 |
| Tariff Code | 2921595090 |
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
- H350 May cause cancer
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P201 Obtain special instructions before use
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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.
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
- (1,1'Biphenyl)4,4'diamine, 3,3'dimethyl, hydrochloride (1:2)
- [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-, dihydrochloride
- 2,3'-Dimethylbiphenyl-4,4'-diamine dihydrochloride
- 3,3'-DIMETHYLBENZIDINE DIHYDROCHLORIDE
- 3,3'-Dimethylbenzidine.2HCl
- 4,4'-Diamino-3,3'-dimethylbiphenyl dihydrochloride
- 4,4'Biotoluidine dihydrochloride
- Benzidine, 3,3'dimethyl, dihydrochloride
- DMB dihydrochloride
- DMB2HCl
Frequently asked questions
What is o-Tolidine dihydrochloride used for?
It is primarily used as a reagent in analytical chemistry and as an intermediate in the synthesis of dyes and pigments.
What is the chemical formula and molecular weight of o-Tolidine dihydrochloride?
The formula is C14H16N2•2HCl with a molecular weight of 285.22 g/mol.
How should o-Tolidine dihydrochloride be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for o-Tolidine dihydrochloride?
It is supplied to a specification with an assay of ≥ 95.0%; custom grades may be available upon request.
Can Molekula supply o-Tolidine dihydrochloride in bulk?
Yes, bulk quantities are available; please contact our sales team for pricing and availability.
What documentation comes with an order of o-Tolidine dihydrochloride?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Where can I buy o-Tolidine dihydrochloride?
Directly from Molekula, which lists o-Tolidine dihydrochloride in 5 g packs from £37.08 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.
Is o-Tolidine dihydrochloride dangerous goods for shipping?
Yes. o-Tolidine dihydrochloride ships as dangerous goods: UN3077, class 9, packing group III.
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.