Hydroquinine
Also known as: Dihydroquinine, (8S,9R)-6'-Methoxy-10,11-dihydrocinchonan-9-ol, (8α,9R)-10,11-Dihydro-6'-methoxycinchonan-9-ol, 10,11-Dihydroquinine, Quinine, 10,11-dihydro-, Cinchonan-9-ol, 10,11-dihydro-6'-methoxy-, (8α,9R)-
Hydroquinine (CAS 522-66-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H26N2O2 and a molecular weight of 326.433 g/mol. Key properties include a melting point of 168-176ºC(lit.), a boiling point of 498.4±30.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 255.2±24.6 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 522-66-7
- Jingsj CID
- J-1986797-1
- Molecular Formula
- C20H26N2O2
- Molecular Weight
- 326.433 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 168-176ºC(lit.) |
|---|---|
| Boiling Point | 498.4±30.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 255.2±24.6 °C |
| Exact Mass | 326.199432 |
| PSA | 45.59000 |
| LogP | 3.77 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.626 |
| Storage Conditions | 2~8°C |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Sharma A, et al. Effects of hydroquinone on retinal and vascular cells in vitro. Indian J Ophthalmol. 2012 May-Jun;60(3):189-93. |
|---|
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Hydroquinine?
The CAS number of Hydroquinine is 522-66-7.
What are the molecular formula and molecular weight of Hydroquinine?
Hydroquinine has molecular formula C20H26N2O2 and molecular weight 326.433 g/mol.
Is Hydroquinine hazardous?
Hydroquinine has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Hydroquinine (CAS 522-66-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1986797-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.