5,5'-Dithiobis(2-nitrobenzoic acid)
5,5'-二硫代双(2-硝基苯甲酸)
Also known as: DTNB, Ellman's Reagent, Ellman Reagent, ELLMAN'S REAGENT, ELLMANS' REAGENT, dithionitrobenzoic acid, Bis(3-carboxy-4-nitrophenyl) disulfide, 3,3'-Disulfanediylbis(6-nitrobenzoic acid), 3-Carboxy-4-nitrophenyl disulfide, 5,5-Dithiobis(2-nitrobenzoic acid), 5,5'-DITHIOBIS(2-NITROBENZOIC ACID), Benzoic acid, 3,3'-dithiobis[6-nitro-, MFCD00007140, UNII:9BZQ3U62JX
5,5'-Dithiobis(2-nitrobenzoic acid) (CAS 69-78-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C14H8N2O8S2 and a molecular weight of 396.352 g/mol. It is also known as DTNB, Ellman's Reagent and Ellman Reagent. Key properties include a melting point of 240-245 °C (dec.)(lit.), a boiling point of 671.9±55.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 360.1±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 69-78-3
- Jingsj CID
- J-1111072-3
- Molecular Formula
- C14H8N2O8S2
- Chinese Name
- 5,5'-二硫代双(2-硝基苯甲酸)
- Molecular Weight
- 396.352 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 240-245 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 671.9±55.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 360.1±31.5 °C |
| Exact Mass | 395.972198 |
| PSA | 216.84000 |
| LogP | 3.97 |
| Vapor Pressure | 0.0±2.2 mmHg at 25°C |
| Refractive Index | 1.769 |
| Stability | Stable. Incompatible with strong bases, strong oxidizing agents. |
Customs & Trade Information
| HS Code | 2930909090 |
|---|---|
| Summary | 2930909090. other organo-sulphur compounds. 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 5,5'-Dithiobis(2-nitrobenzoic acid)?
The CAS number of 5,5'-Dithiobis(2-nitrobenzoic acid) is 69-78-3.
What are the molecular formula and molecular weight of 5,5'-Dithiobis(2-nitrobenzoic acid)?
5,5'-Dithiobis(2-nitrobenzoic acid) has molecular formula C14H8N2O8S2 and molecular weight 396.352 g/mol.
What are the upstream and downstream products of 5,5'-Dithiobis(2-nitrobenzoic acid)?
For 5,5'-Dithiobis(2-nitrobenzoic acid), Downstream Products: Dibutyl disulfide, 2-Nitro-5-thiocyanatobenzoic acid, Dioctyl disulfide.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5,5'-Dithiobis(2-nitrobenzoic acid) (CAS 69-78-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1111072-3 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.