3,3'-Dimethoxybenzidine
Also known as: o-Dianisidine, 3,3'-Dimethoxybiphenyl-4,4'-diamine, 4,4'-Diamino-3,3'-dimethoxybiphenyl, Fast Blue B, [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy-, 3,3'-Dimethoxy-4,4'-biphenyldiamine, 3,3'-Dimethoxy-4,4'-diaminodiphenyl
3,3'-Dimethoxybenzidine (CAS 119-90-4) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C14H16N2O2 and a molecular weight of 244.289 g/mol. Key properties include a melting point of 137-138 °C(lit.), a boiling point of 391.3±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 206.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and H350 — May cause cancer. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 119-90-4
- Jingsj CID
- J-1994254-4
- Molecular Formula
- C14H16N2O2
- Molecular Weight
- 244.289 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 137-138 °C(lit.) |
|---|---|
| Boiling Point | 391.3±37.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 206.1±0.0 °C |
| Exact Mass | 244.121185 |
| PSA | 70.50000 |
| LogP | 1.58 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.619 |
| Additional Property | H2O: slightly soluble |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H350 — May cause cancer
Customs & Trade Information
| HS Code | 2922299090 |
|---|---|
| Summary | 2922299090. other amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; 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'-Dimethoxybenzidine?
The CAS number of 3,3'-Dimethoxybenzidine is 119-90-4.
What are the molecular formula and molecular weight of 3,3'-Dimethoxybenzidine?
3,3'-Dimethoxybenzidine has molecular formula C14H16N2O2 and molecular weight 244.289 g/mol.
Is 3,3'-Dimethoxybenzidine hazardous?
3,3'-Dimethoxybenzidine has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H350 — May cause cancer.
What are the upstream and downstream products of 3,3'-Dimethoxybenzidine?
For 3,3'-Dimethoxybenzidine, Upstream Products: 2-Nitroanisole, o-Anisidine, molecular iodine; Downstream Products: Fast Blue B Salt, 3,3'-Dimethoxy-4,4'-biphenylene diisocyanate, Benzoazurine.
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'-Dimethoxybenzidine (CAS 119-90-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1994254-4 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.