2-Hydroxy-1,4-naphthoquinone
Also known as: Lawsone, C.I. Natural Orange 6, 2-Hydroxy-p-naphthoquinone, 2-Hydroxynaphthoquinone, 1,4-Naphthalenedione, 2-hydroxy-, Henna, Natural Orange 6
2-Hydroxy-1,4-naphthoquinone (CAS 83-72-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H6O3 and a molecular weight of 174.153 g/mol. Key properties include a melting point of 192-195 °C (dec.)(lit.), a boiling point of 339.9±42.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 173.6±24.4 °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. It is listed by 1 supplier, from 6.40 to 8.00 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 83-72-7
- Jingsj CID
- J-11555-7
- Molecular Formula
- C10H6O3
- Molecular Weight
- 174.153 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | >98.0%(LC)(T) 500g | ¥3,200.00 | $0.96 /gBest ¥6.40/g CNY | CN China MOQ 500g | |
In Stock | >98.0%(LC)(T) 100g | ¥800.00 | $1.2 /g ¥8.00/g CNY | CN China MOQ 100g |
Physicochemical Properties
| Melting Point | 192-195 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 339.9±42.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 173.6±24.4 °C |
| Exact Mass | 174.031693 |
| PSA | 54.37000 |
| LogP | 1.55 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.681 |
| Additional Property | 2 g/L (20 ºC) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Tripathi RD, et al. A fungitoxic principle from the leaves of lawsonia inermis lam. Experientia. 1978 Jan 15;34(1):51-2. |
|---|
Customs & Trade Information
| HS Code | 2914690090 |
|---|---|
| Summary | 2914690090 other quinones。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Hydroxy-1,4-naphthoquinone?
The CAS number of 2-Hydroxy-1,4-naphthoquinone is 83-72-7.
What are the molecular formula and molecular weight of 2-Hydroxy-1,4-naphthoquinone?
2-Hydroxy-1,4-naphthoquinone has molecular formula C10H6O3 and molecular weight 174.153 g/mol.
Which suppliers offer 2-Hydroxy-1,4-naphthoquinone?
1 supplier(s) listed; reference unit price ¥6.40–8.00 /g.
Is 2-Hydroxy-1,4-naphthoquinone hazardous?
2-Hydroxy-1,4-naphthoquinone has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 2-Hydroxy-1,4-naphthoquinone?
For 2-Hydroxy-1,4-naphthoquinone, Upstream Products: 1,3-Dihydroxynaphthalene, 1,2-Naphthalenediol, 2-Methoxynaphthalene; Downstream Products: 1,3-Indandione, 2,2'-Bis(3-hydroxy-1,4-naphthoquinone), 2,2,2-Trifluoroethyl 4-methylbenzenesulfonate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Hydroxy-1,4-naphthoquinone (CAS 83-72-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11555-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.