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S-Methylisothiourea hemisulfate

Also known as: 2-Methyl-2-thiopseudourea hemisulfate, 2-Methyl-2-thiopseudourea sulfate, S-Methylisothiourea sulfate, Methyl carbamimidothioate, S-Methylisothiourea, SMIT, SMT, Carbamimidothioic acid methyl ester, Methylthiocarboxamidine, 1-(Methylthio)formamidine, 2-Methylisothiourea

S-Methylisothiourea hemisulfate (CAS 2986-19-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2H6N2S and a molecular weight of 90.14900 g/mol. Key properties include a melting point of 240-241ºC (dec.)(lit.), a boiling point of 138.8ºC at 760mmHg, a density of 1.26g/cm3 and a flash point of 37.7ºC. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
2986-19-8
Jingsj CID
J-1159093-5
Molecular Formula
C2H6N2S
Molecular Weight
90.14900 g/mol
Category
Organic Acids
Last updated
11/2/2026
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Physicochemical Properties

Melting Point240-241ºC (dec.)(lit.)
Boiling Point138.8ºC at 760mmHg
Density1.26g/cm3
Flash Point37.7ºC
Exact Mass278.01800
PSA233.32000
LogP2.51380
Additional PropertyH2O: 0.1 g/mL, clear, colorless

Frequently Asked Questions

What is the CAS number of S-Methylisothiourea hemisulfate?

The CAS number of S-Methylisothiourea hemisulfate is 2986-19-8.

What are the molecular formula and molecular weight of S-Methylisothiourea hemisulfate?

S-Methylisothiourea hemisulfate has molecular formula C2H6N2S and molecular weight 90.14900 g/mol.

What are the upstream and downstream products of S-Methylisothiourea hemisulfate?

For S-Methylisothiourea hemisulfate, Upstream Products: Dimethyl cyanocarbonimidodithioate, Dimethyl sulfate, iodomethane; Downstream Products: 1,3-Bis(methoxycarbonyl)-2-methyl-2-thiopseudourea, Guanidinoethyl sulfonate, Guanidinoacetic acid.

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

Last updated:

How to cite: Jingsj. "S-Methylisothiourea hemisulfate (CAS 2986-19-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1159093-5 (accessed 2026-11-09).

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