Auramine O free base
Also known as: Auramine base, Auramine N base, C.I. Solvent Yellow 34, C.I. 41000B, 4,4'-carbonimidoylbis(N,N-dimethylaniline), 4,4'-bis(dimethylamino)benzophenone imine, Bis(4-dimethylaminophenyl)methanimine, Yellow pyoctanine, Apyonin, Auramine SS, Baso Yellow 124, Blauramine, Waxoline yellow D
Auramine O free base (CAS 492-80-8) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C17H21N3 and a molecular weight of 267.36900 g/mol. Key properties include a melting point of 43 °C, a boiling point of 73 °C733.4 mm Hg(lit.), a density of 1.383 g/mL at 25 °C(lit.) and a flash point of 89.4 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H319 — Causes serious eye irritation and H351 — Suspected of causing cancer. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 492-80-8
- Jingsj CID
- J-29743-5
- Molecular Formula
- C17H21N3
- Molecular Weight
- 267.36900 g/mol
- Category
- Organic Bases
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 43 °C |
|---|---|
| Boiling Point | 73 °C733.4 mm Hg(lit.) |
| Density | 1.383 g/mL at 25 °C(lit.) |
| Flash Point | 89.4 °C |
| Exact Mass | 267.17400 |
| PSA | 30.33000 |
| LogP | 3.33450 |
| Additional Property | 4.38 (vs air) |
| Vapor Pressure | 8.31E-07mmHg at 25°C |
| Refractive Index | 1.4400 |
| Additional Property | 27.9 g/L (20 º C) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H319 — Causes serious eye irritation
- H351 — Suspected of causing cancer
- H411 — Toxic to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2925290090 |
|---|---|
| Summary | 2925290090 other imines and their derivatives; salts thereof。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Auramine O free base?
The CAS number of Auramine O free base is 492-80-8.
What are the molecular formula and molecular weight of Auramine O free base?
Auramine O free base has molecular formula C17H21N3 and molecular weight 267.36900 g/mol.
Is Auramine O free base hazardous?
Auramine O free base has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H319 — Causes serious eye irritation; H351 — Suspected of causing cancer.
What are the upstream and downstream products of Auramine O free base?
For Auramine O free base, Upstream Products: 4,4'-Methylenebis(N,N-dimethylaniline), Michler's ketone, 4-Bromo-N,N-dimethylaniline; Downstream Products: Michler's ketone, Leucocrystal Violet, 4,4'-Bis(dimethylamino)thiobenzophenone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Auramine O free base (CAS 492-80-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29743-5 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.