Guanine
Also known as: 2-Amino-6-hydroxypurine, 2-Aminohypoxanthine, 2-Amino-6-oxy-purine, 9H-Purin-6-ol, 2-amino-, 2-Amino-1,7-dihydro-6H-purin-6-one, 2-Amino-1,9-dihydro-6H-purin-6-one, 2-Amino-3,7-dihydro-6H-purin-6-one, Guanine (8CI), EINECS 200-799-8, MFCD00071533, Ganciclovir Impurity 6, Valaciclovir EP Impurity A
Guanine (CAS 73-40-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5N5O and a molecular weight of 151.126 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 561.5±42.0 °C at 760 mmHg, a density of 2.2±0.1 g/cm3 and a flash point of 293.4±27.9 °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.
- 73-40-5
- Jingsj CID
- J-35526-1
- Molecular Formula
- C5H5N5O
- Molecular Weight
- 151.126 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 561.5±42.0 °C at 760 mmHg |
| Density | 2.2±0.1 g/cm3 |
| Flash Point | 293.4±27.9 °C |
| Exact Mass | 151.049408 |
| PSA | 100.45000 |
| LogP | -2.03 |
| Vapor Pressure | 0.0±1.6 mmHg at 25°C |
| Refractive Index | 2.047 |
| Storage Conditions | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Additional Property | practically insoluble |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of Guanine?
The CAS number of Guanine is 73-40-5.
What are the molecular formula and molecular weight of Guanine?
Guanine has molecular formula C5H5N5O and molecular weight 151.126 g/mol.
Is Guanine hazardous?
Guanine 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 Guanine?
For Guanine, Upstream Products: Acyclovir, 2,4-Diamino-6-hydroxy-5-nitrosopyrimidine, platinum; Downstream Products: Penciclovir, 8-bromoguanine, N-Benzyl-2-chloro-9H-purin-6-amine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Guanine (CAS 73-40-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35526-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.