5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine

Also known as: 2-Amino-5-(2-propynylthio)-1,3,4-thiadiazole, 2-Amino-5-[(propyn-3-yl)thio]-1,3,4-thiadiazole, 5-(2-propyn-1-ylthio)-1,3,4-thiadiazol-2-amine, 5-(prop-2-yn-1-ylthio)-1,3,4-thiadiazol-2-amine, 5-prop-2-ynylsulfanyl-1,3,4-thiadiazol-2-amine, 5-prop-2-ynylthio-1,3,4-thiadiazole-2-ylamine

5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine (CAS 53918-05-1) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C5H5N3S2 and a molecular weight of 171.24300 g/mol. Key properties include a melting point of 134-136ºC, a boiling point of 328.7ºC at 760mmHg, a density of 1.45g/cm3 and a flash point of 152.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 53918-05-1
Jingsj CID: J-866502-9
Molecular Formula: C₅H₅N₃S₂
Molecular Weight: 171.24300 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	134-136ºC
Boiling Point	328.7ºC at 760mmHg
Density	1.45g/cm3
Flash Point	152.6ºC
Exact Mass	170.99200
PSA	105.34000
LogP	1.42680

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine?

The CAS number of 5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine is 53918-05-1.

What are the molecular formula and molecular weight of 5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine?

5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine has molecular formula C5H5N3S2 and molecular weight 171.24300 g/mol.

What are the upstream and downstream products of 5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine?

For 5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine, Upstream Products: 3-Chloropropyne, 5-Amino-1,3,4-thiadiazole-2-thiol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "5-(prop-2-yn-1-ylsulfanyl)-1,3,4-thiadiazol-2-amine (CAS 53918-05-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-866502-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.