3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate
Also known as: TMB dihydrochloride hydrate, TMB·2HCl·xH2O, 3,3',5,5'-Tetramethyl-[1,1'-biphenyl]-4,4'-diamine dihydrochloride hydrate, 3,3',5,5'-Tetramethylbiphenyl-4,4'-diamine dihydrochloride, 3,3',5,5'-Tetramethyl-4,4'-biphenyldiamine dihydrochloride
3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate (CAS 207738-08-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H26Cl2N2O2 and a molecular weight of 349.30200 g/mol. Key properties include a melting point of >300ºC, a boiling point of 459.8ºC at 760 mmHg and a flash point of 231.9ºC. It is listed by 1 supplier, from 7.56 to 8.00 CNY. Record last updated Nov 3, 2026.
- CAS No.
- 207738-08-7
- Jingsj CID
- J-13250-1
- Molecular Formula
- C16H26Cl2N2O2
- Molecular Weight
- 349.30200 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | 98% 500g | ¥3,780.00 | $1.13 /gBest ¥7.56/g CNY | CN China MOQ 500g | |
Made to Order | 98% 100g | ¥780.00 | $1.17 /g ¥7.80/g CNY | CN China MOQ 100g | |
Made to Order | 98% 25g | ¥200.00 | $1.2 /g ¥8.00/g CNY | CN China MOQ 25g |
Physicochemical Properties
| Melting Point | >300ºC |
|---|---|
| Boiling Point | 459.8ºC at 760 mmHg |
| Flash Point | 231.9ºC |
| Exact Mass | 312.115997 |
| PSA | 52.04000 |
| LogP | 6.51800 |
| Vapor Pressure | 3.01E-09mmHg at 25°C |
| Additional Property | Soluble in DMSO (~1.7 mg/ml), and 1:300 DMSO:PBS (pH 7.2) (0.03 mg/ml). |
| SMILES | CC1=CC(=CC(=C1N)C)C2=CC(=C(C(=C2)C)N)C.O.Cl.Cl |
| InChIKey | KVCWTKDFVVSVSJ-UHFFFAOYSA-N |
| InChI | 1S/C16H20N2.2ClH.H2O/c1-9-5-13(6-10(2)15(9)17)14-7-11(3)16(18)12(4)8-14;;;/h5-8H,17-18H2,1-4H3;2*1H;1H2 |
Customs & Trade Information
| HS Code | 2921590090 |
|---|---|
| Summary | 2921590090. other aromatic polyamines and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate?
The CAS number of 3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate is 207738-08-7.
What are the molecular formula and molecular weight of 3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate?
3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate has molecular formula C16H26Cl2N2O2 and molecular weight 349.30200 g/mol.
Which suppliers offer 3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate?
1 supplier(s) listed; reference unit price ¥7.56–8.00 /g.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate (CAS 207738-08-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13250-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.