purpurin
Also known as: 1,2,4-Trihydroxy-9,10-anthracenedione, 1,2,4-Trihydroxy-9,10-anthraquinone, 1,2,4-Trihydroxyanthraquinone, 1,2,4-trihydroxyanthracene-9,10-dione, 1,2,4-trishydroxy-9,10-anthraquinone, 9,10-Anthracenedione, 1,2,4-trihydroxy-, C.I. Natural Red 16, C.I. Natural Red 8, EINECS 201-359-8, Hydroxylizaric acid, MFCD00001203, Purpurin, Purpurine, Smoke Brown G, Verantin, natural red 16
purpurin (CAS 81-54-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C14H8O5 and a molecular weight of 256.210 g/mol. Key properties include a melting point of 253-256ºC(lit.), a boiling point of 525.1±45.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 285.4±25.2 °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 36.00 to 36.00 CNY per 25g. Record last updated Aug 21, 2026.
- CAS No.
- 81-54-9
- Jingsj CID
- J-50020-7
- Molecular Formula
- C14H8O5
- Molecular Weight
- 256.210 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | 85% 25g | ¥900.00 | $5.39 /gBest ¥36.00/g CNY | CN China MOQ 25g | |
In Stock | 95% 25g | ¥900.00 | $5.39 /g ¥36.00/g CNY | CN China MOQ 25g |
Physicochemical Properties
| Melting Point | 253-256ºC(lit.) |
|---|---|
| Boiling Point | 525.1±45.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 285.4±25.2 °C |
| Exact Mass | 256.037170 |
| PSA | 94.83000 |
| LogP | 4.60 |
| Appearance | Powder |
| Vapor Pressure | 0.0±1.4 mmHg at 25°C |
| Refractive Index | 1.773 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Ma L, et al. Purpurin exerted antidepressant-like effects on behavior and stress axis reactivity: evidence of serotonergic engagement. Psychopharmacology (Berl). 2020 Mar;237(3):887-899. |
|---|
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 purpurin?
The CAS number of purpurin is 81-54-9.
What are the molecular formula and molecular weight of purpurin?
purpurin has molecular formula C14H8O5 and molecular weight 256.210 g/mol.
Which suppliers offer purpurin?
1 supplier(s) listed; reference unit price ¥36.00–36.00 /g.
Is purpurin hazardous?
purpurin 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 purpurin?
For purpurin, Upstream Products: Alizarin, Anthraquinone, Phthalic anhydride; Downstream Products: Quinizarin, 2,5-Dihydroxy-1,4-benzoquinone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "purpurin (CAS 81-54-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-50020-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.