5-Amino-2-mercaptobenzimidazole

5-氨基-2-巯基苯并咪唑

Also known as: 5-Amino-2-benzimidazolethiol, 5-Amino-1H-benzimidazole-2-thiol, 5-Amino-1,3-dihydro-2H-benzimidazole-2-thione, 5-Aminobenzimidazole-2-thiol, 2-Mercapto-5-aminobenzimidazole, 5-Amino-1H-benzo[d]imidazole-2-thiol, 5-Amino-1,3-dihydro-benzoimidazole-2-thione

5-Amino-2-mercaptobenzimidazole (CAS 2818-66-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H7N3S and a molecular weight of 165.21600 g/mol. It is also known as 5-Amino-2-benzimidazolethiol, 5-Amino-1H-benzimidazole-2-thiol and 5-Amino-1,3-dihydro-2H-benzimidazole-2-thione. Key properties include a melting point of 240-244 °C(lit.), a boiling point of 356.8ºC at 760 mmHg, a density of 1.48g/cm3 and a flash point of 169.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2818-66-8
Jingsj CID: J-26245-9
Molecular Formula: C₇H₇N₃S
Chinese Name: 5-氨基-2-巯基苯并咪唑
Molecular Weight: 165.21600 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	240-244 °C(lit.)
Boiling Point	356.8ºC at 760 mmHg
Density	1.48g/cm3
Flash Point	169.6ºC

Frequently Asked Questions

What is the CAS number of 5-Amino-2-mercaptobenzimidazole?

The CAS number of 5-Amino-2-mercaptobenzimidazole is 2818-66-8.

What are the molecular formula and molecular weight of 5-Amino-2-mercaptobenzimidazole?

5-Amino-2-mercaptobenzimidazole has molecular formula C7H7N3S and molecular weight 165.21600 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5-Amino-2-mercaptobenzimidazole (CAS 2818-66-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26245-9 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.