2-Mercapto-4,5-dimethylthiazole

Also known as: 4,5-Dimethylthiazole-2-thiol, 4,5-Dimethyl-1,3-thiazole-2-thiol, 4,5-Dimethyl-3H-1,3-thiazole-2-thione, 4,5-Dimethylthiazole-2(3H)-thione, 4,5-Dimethyl-2-thiazolethiol

2-Mercapto-4,5-dimethylthiazole (CAS 5351-51-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H7NS2 and a molecular weight of 145.24600 g/mol. Key properties include a melting point of 166ºC, a boiling point of 214.5ºC at 760mmHg, a density of 1.28g/cm3 and a flash point of 83.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5351-51-9
Jingsj CID: J-23233-7
Molecular Formula: C₅H₇NS₂
Molecular Weight: 145.24600 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	166ºC
Boiling Point	214.5ºC at 760mmHg
Density	1.28g/cm3
Flash Point	83.5ºC
Exact Mass	145.00200
PSA	79.93000
LogP	2.04860
Refractive Index	1.649

Customs & Trade Information

HS Code	2934100090
Summary	2934100090 other compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2-Mercapto-4,5-dimethylthiazole?

The CAS number of 2-Mercapto-4,5-dimethylthiazole is 5351-51-9.

What are the molecular formula and molecular weight of 2-Mercapto-4,5-dimethylthiazole?

2-Mercapto-4,5-dimethylthiazole has molecular formula C5H7NS2 and molecular weight 145.24600 g/mol.

What are the upstream and downstream products of 2-Mercapto-4,5-dimethylthiazole?

For 2-Mercapto-4,5-dimethylthiazole, Upstream Products: Ammonium dithiocarbamate, 3-Chloro-2-butanone, 3-Bromo-2-butanone; Downstream Products: 4,5-Dimethylthiazole.

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. "2-Mercapto-4,5-dimethylthiazole (CAS 5351-51-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23233-7 (accessed 2026-11-09).

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