Pamoic acid
Also known as: Embonic acid, 4,4'-Methylenebis(3-hydroxy-2-naphthoic acid), 1,1'-Methylene-bis(2-hydroxy-3-naphthoic acid), 2,2'-Dihydroxy-1,1'-dinaphthylmethane-3,3'-dicarboxylic acid, 4,4'-Methylenedi(3-hydroxy-2-naphthoic acid)
Pamoic acid (CAS 130-85-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C23H16O6 and a molecular weight of 388.38 g/mol. Key properties include a melting point of ≥300 °C (dec.), a boiling point of 642.7±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 356.5±28.0 °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 Nov 3, 2026.
- CAS No.
- 130-85-8
- Jingsj CID
- J-6776-6
- Molecular Formula
- C23H16O6
- Molecular Weight
- 388.38 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | ≥300 °C (dec.) |
|---|---|
| Boiling Point | 642.7±55.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 356.5±28.0 °C |
| Exact Mass | 388.094696 |
| PSA | 115.06000 |
| LogP | 6.35 |
| Vapor Pressure | 0.0±2.0 mmHg at 25°C |
| Refractive Index | 1.782 |
| Additional Property | PRACTICALLY INSOLUBLE |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | EC50: 79 nM (GPR35)[1] |
|---|---|
| Additional Information | [1]. Ozayra Sharmin, et al. Activation of GPR35 protects against cerebral ischemia by recruiting monocyte-derived macrophages. Sci Rep. 2020 Jun 10;10(1):9400. [2]. Pingwei Zhao, et al. Targeting of the orphan receptor GPR35 by pamoic acid: a potent activator of extracellular signal-regulated kinase and β-arrestin2 with antinociceptive activity. Mol Pharmacol. 2010 Oct;78(4):560-8. |
Customs & Trade Information
| HS Code | 2918290000 |
|---|---|
| Summary | HS: 2918290000 other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) VAT:17.0% MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Pamoic acid?
The CAS number of Pamoic acid is 130-85-8.
What are the molecular formula and molecular weight of Pamoic acid?
Pamoic acid has molecular formula C23H16O6 and molecular weight 388.38 g/mol.
Is Pamoic acid hazardous?
Pamoic acid 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 Pamoic acid?
For Pamoic acid, Upstream Products: Formaldehyde, 3-Hydroxy-2-naphthoic acid, acetic acid; Downstream Products: Pamoic acid disodium salt monohydrate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pamoic acid (CAS 130-85-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6776-6 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.