4-Aminophthalic acid
Also known as: 4-Amino-1,2-benzenedicarboxylic acid, 1,2-Benzenedicarboxylic acid, 4-amino-, 4-Amino-o-phthalic acid, AKOS 92080, 4-aminophthalate, 4-Aminophthalsure
4-Aminophthalic acid (CAS 5434-21-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7NO4 and a molecular weight of 181.145 g/mol. Key properties include a melting point of 344 °C (dec.)(lit.), a boiling point of 465.1±40.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 235.1±27.3 °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.
- 5434-21-9
- Jingsj CID
- J-1142276-7
- Molecular Formula
- C8H7NO4
- Molecular Weight
- 181.145 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 344 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 465.1±40.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 235.1±27.3 °C |
| Exact Mass | 181.037506 |
| PSA | 100.62000 |
| LogP | -0.08 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.684 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2922499990 |
|---|---|
| Summary | HS:2922499990 other amino-acids, other than those containing more than one kind of oxygen function, and their esters; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Aminophthalic acid?
The CAS number of 4-Aminophthalic acid is 5434-21-9.
What are the molecular formula and molecular weight of 4-Aminophthalic acid?
4-Aminophthalic acid has molecular formula C8H7NO4 and molecular weight 181.145 g/mol.
Is 4-Aminophthalic acid hazardous?
4-Aminophthalic 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 4-Aminophthalic acid?
For 4-Aminophthalic acid, Upstream Products: 4-Nitrophthalic acid, Dimethyl 4-nitrophthalate, Phthalic acid; Downstream Products: 4-Chlorophthalic acid, 4-Hydroxyphthalic acid, 3-Aminobenzoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Aminophthalic acid (CAS 5434-21-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1142276-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.