5-Aminopyrimidine
Also known as: 5-AMINOPYRIMIDINE, PYRIMIDIN-5-AMINE, 5-Pyrimidinamine, PYRIMIDIN-5-YLAMINE, Pyrimidin-5-amine
5-Aminopyrimidine (CAS 591-55-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H5N3 and a molecular weight of 95.10 g/mol. Key properties include a melting point of 171°C(lit.), a boiling point of 240.7±13.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 122.6±7.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 591-55-9
- Jingsj CID
- J-1955335-6
- Molecular Formula
- C4H5N3
- Molecular Weight
- 95.10 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 171°C(lit.) |
|---|---|
| Boiling Point | 240.7±13.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 122.6±7.0 °C |
| Exact Mass | 95.048347 |
| PSA | 51.80000 |
| LogP | -0.56 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.598 |
| Storage Conditions | Room temperature. |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933599090 |
|---|---|
| Summary | 2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. 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 5-Aminopyrimidine?
The CAS number of 5-Aminopyrimidine is 591-55-9.
What are the molecular formula and molecular weight of 5-Aminopyrimidine?
5-Aminopyrimidine has molecular formula C4H5N3 and molecular weight 95.10 g/mol.
Is 5-Aminopyrimidine hazardous?
5-Aminopyrimidine has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 5-Aminopyrimidine?
For 5-Aminopyrimidine, Upstream Products: 3,5-Dichloropyridazin-4-amine, 5-Amino-4,6-dichloropyrimidine, 4,6-Dichloro-5-nitropyrimidine; Downstream Products: Pyrimido[5,4-d]pyrimidine, 5-Amino-4-bromopyrimidine, N-(Pyrimidin-5-yl)acetamide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Aminopyrimidine (CAS 591-55-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1955335-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.